TY  - CONF
AU  - Latas, Nemanja
AU  - Rajić, Vladimir
AU  - Jugović, Dragana
AU  - Cvjetićanin, Nikola
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/16167
UR  - https://www.shd.org.rs/wp-content/uploads/2023/11/9CYCS_Book-of-Abstracts.pdf
AB  - Lithium-ion batteries (LIBs) are the most promising energy storage devices on the market today. Their importance is reflected in the fact that LIBs power numerous portable devices and that they are being developed for electric and hybrid electric vehicles [1]. Most commercial LIBs are composed of a graphite anode, which cannot meet high performace requirements [2]. Several transition metal-oxide based hosts have been considered as potential alternatives to the graphite anode, including TiO2. Low cost, high Li-ion insertion potential, low volume expansion and good cycling life make TiO2 a promising anode material. Different polymorphs of TiO2 have been investigated, and preference is given to the anatase phase. Herein, anatase TiO2 nanotube arrays (NTAs) electrode was preapred by anodic oxidation of Ti-foil and subesquent annealing at 400 oC. SEM micrographs show that the nanotubes (NTs) are cylindrical in shape, with an average inner diameter of about 95 nm and wall thickness ~15 nm. In the Raman spectrum, five active modes which correspond to the anatase phase are present. XRD pattern of as-prepared Ti/TiO2 NTAs electrode was recorded, and the strongest diffraction maximum of anatase phase was used for the claculation of the mean crystallite size. The obtained value is 19 ± 1 nm. Electrochemical experiments, which included cyclic voltammery (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic (GS) cycling, were carried out using a termostat in the temperature range from 25 – 55 oC. The 1 M solution of LiClO4 in propylene carbonate was used as an electrolyte in all cases. CV experiments demonstrated an increase in the redox peak intensity and a decrease in peak-to-peak separation at higher temperatures, indicating improvement in Li-ion storage capability and better reversibilty of Li-ion intercalation/deintercalation process. GS cycling showed a large Li-ion insertion capacity of Ti/TiO2 NTAs electrode, high Coulombic efficiency (CE) and good capcity retention. Lithiation capacity at 55 oC attains 357 mAh·g-1 at current rate 5.3 C, with CE of 97.5% and capacity retention of 98.5% after 50 cycles. EIS showed with increasing temperature a multifold decrease in solid electrolyte interphase (SEI) layer resistance and charge transfer resistance. EDS and FTIR spectra of Ti/TiO2 NTAs electrode were recorded to better underastand the nature of the formed SEI film.
PB  - Belgrade : Serbian Chemical Society
PB  - Belgrade : Serbian Young Chemists Club
C3  - Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad
T1  - Electrochemical study of Li-ion intercalation into anatase TiO2 nanotubes at different temperatures
SP  - 160
EP  - 160
UR  - https://hdl.handle.net/21.15107/rcub_dais_16167
ER  - 

@conference{
author = "Latas, Nemanja and Rajić, Vladimir and Jugović, Dragana and Cvjetićanin, Nikola",
year = "2023",
abstract = "Lithium-ion batteries (LIBs) are the most promising energy storage devices on the market today. Their importance is reflected in the fact that LIBs power numerous portable devices and that they are being developed for electric and hybrid electric vehicles [1]. Most commercial LIBs are composed of a graphite anode, which cannot meet high performace requirements [2]. Several transition metal-oxide based hosts have been considered as potential alternatives to the graphite anode, including TiO2. Low cost, high Li-ion insertion potential, low volume expansion and good cycling life make TiO2 a promising anode material. Different polymorphs of TiO2 have been investigated, and preference is given to the anatase phase. Herein, anatase TiO2 nanotube arrays (NTAs) electrode was preapred by anodic oxidation of Ti-foil and subesquent annealing at 400 oC. SEM micrographs show that the nanotubes (NTs) are cylindrical in shape, with an average inner diameter of about 95 nm and wall thickness ~15 nm. In the Raman spectrum, five active modes which correspond to the anatase phase are present. XRD pattern of as-prepared Ti/TiO2 NTAs electrode was recorded, and the strongest diffraction maximum of anatase phase was used for the claculation of the mean crystallite size. The obtained value is 19 ± 1 nm. Electrochemical experiments, which included cyclic voltammery (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic (GS) cycling, were carried out using a termostat in the temperature range from 25 – 55 oC. The 1 M solution of LiClO4 in propylene carbonate was used as an electrolyte in all cases. CV experiments demonstrated an increase in the redox peak intensity and a decrease in peak-to-peak separation at higher temperatures, indicating improvement in Li-ion storage capability and better reversibilty of Li-ion intercalation/deintercalation process. GS cycling showed a large Li-ion insertion capacity of Ti/TiO2 NTAs electrode, high Coulombic efficiency (CE) and good capcity retention. Lithiation capacity at 55 oC attains 357 mAh·g-1 at current rate 5.3 C, with CE of 97.5% and capacity retention of 98.5% after 50 cycles. EIS showed with increasing temperature a multifold decrease in solid electrolyte interphase (SEI) layer resistance and charge transfer resistance. EDS and FTIR spectra of Ti/TiO2 NTAs electrode were recorded to better underastand the nature of the formed SEI film.",
publisher = "Belgrade : Serbian Chemical Society, Belgrade : Serbian Young Chemists Club",
journal = "Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad",
title = "Electrochemical study of Li-ion intercalation into anatase TiO2 nanotubes at different temperatures",
pages = "160-160",
url = "https://hdl.handle.net/21.15107/rcub_dais_16167"
}

Latas, N., Rajić, V., Jugović, D.,& Cvjetićanin, N.. (2023). Electrochemical study of Li-ion intercalation into anatase TiO2 nanotubes at different temperatures. in Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad
Belgrade : Serbian Chemical Society., 160-160.
https://hdl.handle.net/21.15107/rcub_dais_16167

Latas N, Rajić V, Jugović D, Cvjetićanin N. Electrochemical study of Li-ion intercalation into anatase TiO2 nanotubes at different temperatures. in Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad. 2023;:160-160.
https://hdl.handle.net/21.15107/rcub_dais_16167 .

Latas, Nemanja, Rajić, Vladimir, Jugović, Dragana, Cvjetićanin, Nikola, "Electrochemical study of Li-ion intercalation into anatase TiO2 nanotubes at different temperatures" in Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad (2023):160-160,
https://hdl.handle.net/21.15107/rcub_dais_16167 .

TY  - JOUR
AU  - Veselinović, Ljiljana
AU  - Mitrić, Miodrag
AU  - Mančić, Lidija
AU  - Jardim, Paula M.
AU  - Škapin, Srečo Davor
AU  - Cvjetićanin, Nikola
AU  - Milović, Miloš D.
AU  - Marković, Smilja
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13562
AB  - This paper reports a detailed study of crystal structure and dielectric properties of ruthenium-substituted calcium-copper titanates (CaCu3Ti4−xRuxO12, CCTRO). A series of three samples with different stoichiometry was prepared: CaCu3Ti4−xRuxO12, x = 0, 1 and 4, abbreviated as CCTO, CCT3RO and CCRO, respectively. A detailed structural analysis of CCTRO samples was done by the Rietveld refinement of XRPD data. The results show that, regardless of whether Ti4+ or Ru4+ ions are placed in B crystallographic position in AA’3B4O12 (CaCu3Ti4−xRuxO12) unit cell, the crystal structure remains cubic with Im3¯ symmetry. Slight increases in the unit cell parameters, cell volume and interatomic distances indicate that Ru4+ ions with larger ionic radii (0.62 Å) than Ti4+ (0.605 Å) are incorporated in the CaCu3Ti4−xRuxO12 crystal lattice. The structural investigations were confirmed using TEM, HRTEM and ADF/STEM analyses, including EDXS elemental mapping. The effect of Ru atoms share in CaCu3Ti4−xRuxO12 samples on their electrical properties was determined by impedance and dielectric measurements. Results of dielectric measurements indicate that one atom of ruthenium per CaCu3Ti4−xRuxO12 unit cell transforms dielectric CCTO into conductive CCT3RO while preserving cubic crystal structure. Our findings about CCTO and CCT3RO ceramics promote them as ideal tandem to overcome the problem of stress on dielectric-electrode interfaces in capacitors.
T2  - Materials
T1  - Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate
SP  - 8500
SP  - 8500
VL  - 15
IS  - 23
DO  - 10.3390/ma15238500
UR  - https://hdl.handle.net/21.15107/rcub_dais_13562
ER  - 

@article{
author = "Veselinović, Ljiljana and Mitrić, Miodrag and Mančić, Lidija and Jardim, Paula M. and Škapin, Srečo Davor and Cvjetićanin, Nikola and Milović, Miloš D. and Marković, Smilja",
year = "2022",
abstract = "This paper reports a detailed study of crystal structure and dielectric properties of ruthenium-substituted calcium-copper titanates (CaCu3Ti4−xRuxO12, CCTRO). A series of three samples with different stoichiometry was prepared: CaCu3Ti4−xRuxO12, x = 0, 1 and 4, abbreviated as CCTO, CCT3RO and CCRO, respectively. A detailed structural analysis of CCTRO samples was done by the Rietveld refinement of XRPD data. The results show that, regardless of whether Ti4+ or Ru4+ ions are placed in B crystallographic position in AA’3B4O12 (CaCu3Ti4−xRuxO12) unit cell, the crystal structure remains cubic with Im3¯ symmetry. Slight increases in the unit cell parameters, cell volume and interatomic distances indicate that Ru4+ ions with larger ionic radii (0.62 Å) than Ti4+ (0.605 Å) are incorporated in the CaCu3Ti4−xRuxO12 crystal lattice. The structural investigations were confirmed using TEM, HRTEM and ADF/STEM analyses, including EDXS elemental mapping. The effect of Ru atoms share in CaCu3Ti4−xRuxO12 samples on their electrical properties was determined by impedance and dielectric measurements. Results of dielectric measurements indicate that one atom of ruthenium per CaCu3Ti4−xRuxO12 unit cell transforms dielectric CCTO into conductive CCT3RO while preserving cubic crystal structure. Our findings about CCTO and CCT3RO ceramics promote them as ideal tandem to overcome the problem of stress on dielectric-electrode interfaces in capacitors.",
journal = "Materials",
title = "Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate",
pages = "8500-8500",
volume = "15",
number = "23",
doi = "10.3390/ma15238500",
url = "https://hdl.handle.net/21.15107/rcub_dais_13562"
}

Veselinović, L., Mitrić, M., Mančić, L., Jardim, P. M., Škapin, S. D., Cvjetićanin, N., Milović, M. D.,& Marković, S.. (2022). Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate. in Materials, 15(23), 8500.
https://doi.org/10.3390/ma15238500
https://hdl.handle.net/21.15107/rcub_dais_13562

Veselinović L, Mitrić M, Mančić L, Jardim PM, Škapin SD, Cvjetićanin N, Milović MD, Marković S. Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate. in Materials. 2022;15(23):8500.
doi:10.3390/ma15238500
https://hdl.handle.net/21.15107/rcub_dais_13562 .

Veselinović, Ljiljana, Mitrić, Miodrag, Mančić, Lidija, Jardim, Paula M., Škapin, Srečo Davor, Cvjetićanin, Nikola, Milović, Miloš D., Marković, Smilja, "Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate" in Materials, 15, no. 23 (2022):8500,
https://doi.org/10.3390/ma15238500 .,
https://hdl.handle.net/21.15107/rcub_dais_13562 .

TY  - CONF
AU  - Vasić, Milica M.
AU  - Milikić, Jadranka
AU  - Amaral, Luis
AU  - Cvjetićanin, Nikola
AU  - Jugović, Dragana
AU  - Hercigonja, Radmila
AU  - Šljukić, Biljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/14864
AB  - Water electrolysis represents a simple and clean method for production of hydrogen and oxygen. Nickel is a promising electrode material for large-scale application. Its activity could be improved by alloying it with other metals, non-metals or rare earth elements, or by fabrication in the form of foams or nanostructured composites, grafting onto a high surface area support, etc.
In this study, Ni2+ cation-exchanged zeolites NiA and NiX were tested as electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) in alkaline media (1 M KOH). Conventional ion-exchange procedure was used to prepare Ni2+ cation-exchanged forms of NaA and NaX zeolites. The obtained materials, NiA and NiX, are described by formula Ni6(AlO2)12(SiO2)12 and Na23Ni32(AlO2)87(SiO2)105, respectively.
XRD analysis generally confirmed the crystalline structure of the studied materials. In the case of NiA, broadening of diffraction peaks at 2θ angle of 11, 24 and 35o indicated partial distortion of the zeolite crystal lattice during ion-exchange process.
Electrocatalitic activity of NiA and NiX for HER and OER was studied in 1 M KOH by recording polarization curves, chronoamperograms and electrochemical impedance spectra. For both reactions, NiA exhibited better catalytic activity than NiX, including higher current density and lower Tafel slope values. This could be correlated with higher Ni weight fraction in NiA than in NiX, and with higher electrical conductivity of NiA. Analysis of the electrochemical impedance spectra revealed that the HER is controlled by adsorption of the Hads intermediate, while the OER is controlled by the charge transfer at the potentials of interest for the process. Relatively good stability of both materials during HER and OER was deduced from the chronoamperometric curves.
PB  - Belgrade : Faculty of physical chemistry
C3  - Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade
T1  - NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media
SP  - 36
EP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_dais_14864
ER  - 

@conference{
author = "Vasić, Milica M. and Milikić, Jadranka and Amaral, Luis and Cvjetićanin, Nikola and Jugović, Dragana and Hercigonja, Radmila and Šljukić, Biljana",
year = "2018",
abstract = "Water electrolysis represents a simple and clean method for production of hydrogen and oxygen. Nickel is a promising electrode material for large-scale application. Its activity could be improved by alloying it with other metals, non-metals or rare earth elements, or by fabrication in the form of foams or nanostructured composites, grafting onto a high surface area support, etc.
In this study, Ni2+ cation-exchanged zeolites NiA and NiX were tested as electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) in alkaline media (1 M KOH). Conventional ion-exchange procedure was used to prepare Ni2+ cation-exchanged forms of NaA and NaX zeolites. The obtained materials, NiA and NiX, are described by formula Ni6(AlO2)12(SiO2)12 and Na23Ni32(AlO2)87(SiO2)105, respectively.
XRD analysis generally confirmed the crystalline structure of the studied materials. In the case of NiA, broadening of diffraction peaks at 2θ angle of 11, 24 and 35o indicated partial distortion of the zeolite crystal lattice during ion-exchange process.
Electrocatalitic activity of NiA and NiX for HER and OER was studied in 1 M KOH by recording polarization curves, chronoamperograms and electrochemical impedance spectra. For both reactions, NiA exhibited better catalytic activity than NiX, including higher current density and lower Tafel slope values. This could be correlated with higher Ni weight fraction in NiA than in NiX, and with higher electrical conductivity of NiA. Analysis of the electrochemical impedance spectra revealed that the HER is controlled by adsorption of the Hads intermediate, while the OER is controlled by the charge transfer at the potentials of interest for the process. Relatively good stability of both materials during HER and OER was deduced from the chronoamperometric curves.",
publisher = "Belgrade : Faculty of physical chemistry",
journal = "Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade",
title = "NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media",
pages = "36-36",
url = "https://hdl.handle.net/21.15107/rcub_dais_14864"
}

Vasić, M. M., Milikić, J., Amaral, L., Cvjetićanin, N., Jugović, D., Hercigonja, R.,& Šljukić, B.. (2018). NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media. in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade
Belgrade : Faculty of physical chemistry., 36-36.
https://hdl.handle.net/21.15107/rcub_dais_14864

Vasić MM, Milikić J, Amaral L, Cvjetićanin N, Jugović D, Hercigonja R, Šljukić B. NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media. in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade. 2018;:36-36.
https://hdl.handle.net/21.15107/rcub_dais_14864 .

Vasić, Milica M., Milikić, Jadranka, Amaral, Luis, Cvjetićanin, Nikola, Jugović, Dragana, Hercigonja, Radmila, Šljukić, Biljana, "NiA and NiX zeolites as electrocatalysts for water splitting in alkaline media" in Book of Abstracts / 3rd International Meeting on materials science for energy related applications, september 25-26, 2018, Belgrade (2018):36-36,
https://hdl.handle.net/21.15107/rcub_dais_14864 .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Vasić, Milica M.
AU  - Amaral, Luis
AU  - Cvjetićanin, Nikola
AU  - Jugović, Dragana
AU  - Hercigonja, Radmila
AU  - Šljukić, Biljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4588
AB  - NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media
SP  - 18977
EP  - 18991
VL  - 43
IS  - 41
DO  - 10.1016/j.ijhydene.2018.08.063
UR  - https://hdl.handle.net/21.15107/rcub_dais_4588
ER  - 

@article{
author = "Milikić, Jadranka and Vasić, Milica M. and Amaral, Luis and Cvjetićanin, Nikola and Jugović, Dragana and Hercigonja, Radmila and Šljukić, Biljana",
year = "2018",
abstract = "NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media",
pages = "18977-18991",
volume = "43",
number = "41",
doi = "10.1016/j.ijhydene.2018.08.063",
url = "https://hdl.handle.net/21.15107/rcub_dais_4588"
}

Milikić, J., Vasić, M. M., Amaral, L., Cvjetićanin, N., Jugović, D., Hercigonja, R.,& Šljukić, B.. (2018). NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy
Elsevier., 43(41), 18977-18991.
https://doi.org/10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4588

Milikić J, Vasić MM, Amaral L, Cvjetićanin N, Jugović D, Hercigonja R, Šljukić B. NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy. 2018;43(41):18977-18991.
doi:10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4588 .

Milikić, Jadranka, Vasić, Milica M., Amaral, Luis, Cvjetićanin, Nikola, Jugović, Dragana, Hercigonja, Radmila, Šljukić, Biljana, "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media" in International Journal of Hydrogen Energy, 43, no. 41 (2018):18977-18991,
https://doi.org/10.1016/j.ijhydene.2018.08.063 .,
https://hdl.handle.net/21.15107/rcub_dais_4588 .

TY  - JOUR
AU  - Milikić, Jadranka
AU  - Vasić, Milica M.
AU  - Amaral, Luis
AU  - Cvjetićanin, Nikola
AU  - Jugović, Dragana
AU  - Hercigonja, Radmila
AU  - Šljukić, Biljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4077
AB  - NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC
PB  - Elsevier
T2  - International Journal of Hydrogen Energy
T1  - NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media
SP  - 18977
EP  - 18991
VL  - 43
IS  - 41
DO  - 10.1016/j.ijhydene.2018.08.063
UR  - https://hdl.handle.net/21.15107/rcub_dais_4077
ER  - 

@article{
author = "Milikić, Jadranka and Vasić, Milica M. and Amaral, Luis and Cvjetićanin, Nikola and Jugović, Dragana and Hercigonja, Radmila and Šljukić, Biljana",
year = "2018",
abstract = "NiA and NiX zeolites were prepared and characterised using XRD, FTIR and SEM, and subsequently tested as electrodes for hydrogen (HER) and oxygen (OER) evolution reactions in alkaline media. Linear sweep voltammetry and chronoamperometry techniques showed that NiA has higher catalytic activity for these two reactions, as evidenced by higher current densities, which can be correlated with a higher weight fraction of Ni in this electrocatalyst than in the NiX and with its higher conductivity. HER and OER kinetic parameters, including Tafel slope, exchange current density and apparent activation energy were evaluated. Electrochemical impedance spectroscopy analysis yielded values of the resistance of the solution, charge transfer and mass transfer, as well as double layer capacitance and pseudo-capacitance of the working electrode, at different potentials and temperatures. Unlike the HER, during which the mass transfer resistance of the adsorbed intermediate is dominant in the case of NiA, the OER impedance response is controlled by the charge transfer process itself at the potentials of interest for these process. The overall resistance related to the HER is lower for NiA than for NiX. © 2018 Hydrogen Energy Publications LLC",
publisher = "Elsevier",
journal = "International Journal of Hydrogen Energy",
title = "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media",
pages = "18977-18991",
volume = "43",
number = "41",
doi = "10.1016/j.ijhydene.2018.08.063",
url = "https://hdl.handle.net/21.15107/rcub_dais_4077"
}

Milikić, J., Vasić, M. M., Amaral, L., Cvjetićanin, N., Jugović, D., Hercigonja, R.,& Šljukić, B.. (2018). NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy
Elsevier., 43(41), 18977-18991.
https://doi.org/10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4077

Milikić J, Vasić MM, Amaral L, Cvjetićanin N, Jugović D, Hercigonja R, Šljukić B. NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media. in International Journal of Hydrogen Energy. 2018;43(41):18977-18991.
doi:10.1016/j.ijhydene.2018.08.063
https://hdl.handle.net/21.15107/rcub_dais_4077 .

Milikić, Jadranka, Vasić, Milica M., Amaral, Luis, Cvjetićanin, Nikola, Jugović, Dragana, Hercigonja, Radmila, Šljukić, Biljana, "NiA and NiX zeolites as bifunctional electrocatalysts for water splitting in alkaline media" in International Journal of Hydrogen Energy, 43, no. 41 (2018):18977-18991,
https://doi.org/10.1016/j.ijhydene.2018.08.063 .,
https://hdl.handle.net/21.15107/rcub_dais_4077 .

TY  - THES
AU  - Kuzmanović, Maja
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15988
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=5007
UR  - http://nardus.mpn.gov.rs/123456789/8260
AB  - Predmet istraživanja ove doktorske disertacije je ispitivanje mogućnosti dobijanja prahova litijum gvožđe(II) fosfata (LiFePO4) novim i modifikovanim načinima sinteze. Zahvaljujući svojoj sposobnosti da reverzibilno interkalira/deinterkalira jone litijuma ovaj materijal se koristi kao katoda u litijum jonskim baterijama. Osnovni cilj ovih istraživanja je bio da se dobije čist materijal bez prisustva nečistoća, koji će imati pogodne fizičkohemijske karakteristike za elektrohemijsku primenu. Parametri kristalne građe mogu značajno uticati na elektrohemijske osobine, tako da je cilj istraživanja bio da se ovaj uticaj razjasni i da se sintetišu materijali koji bi u ovom smislu imali najoptimalniju morfologiju i ostale mikrostrukturne osobine. Polazeći iz vodenih rastvora, koji su se sastojali od jona litijuma, gvožđa i fosfora pomešanih u odnosu koji zadovoljava stehiometriju LiFePO4 i odgovarajuće karboksilne kiseline, dobijene su prekursorske smeše mikroemulzionom metodom, koprecipitacijom i liofilizacijom koje su dalje termički tretirane. Prekursorska smeša dobijena mikroemulzionom metodom je solvotermalno tretirana na temperaturi od 180 oC, dok su prekursorske smeše dobijene koprecipitacijom i liofilizacijom termički tretirane na visokim temperaturama (600-800 oC) u cilju dobijanja kristalnog praha LiFePO4. Korišćenjem eksperimentalnih tehnika rendgenske difrakcije na prahu, skenirajuće elektronske mikroskopije, Mesbauerove spektroskopije, rasejanja laserske svetlosti, termičke analize i elektrohemijske analize ispitan je uticaj različitih karboksilnih kiselina kao redukcionog sredstva i izvora ugljenika na morfološke i elektrohemijske karakteristike sintetisanih prahova.
AB  - The subject of this PhD thesis is investigation of possibility to synthesize lithium iron (II) phosphate (LiFePO4) powders with new and modified synthesis procedures. Due to its ability to reversibly intercalate/deintercalate lithium ions, this material is used as a cathode in lithium ion batteries. The main objective of this research was to synthesize pure material without any phase impurities, which would have appropriate physical chemical properties for electrochemical applications. Crystal lattice parameters can significantly influence electrochemical properties, and this thesis aim is to clarify this relation and to synthesize materials with optimal morphology and other microstructural properties. Starting from mixed aqueous solution of lithium, phosphorus and iron ions in stoichiometric ratio and different carboxylic acids, precursors mixtures were prepared by microemulsion, coprecipitation and lyophilisation techniques, and afterwards were thermally treated. To prepare crystal LiFePO4 powders, microemulsion-derived precursor mixture was solvothermally treated at 180 oC, while precursor mixtures obtained by coprecipitation and lyophilisation were thermally treated at high temperatures (600-800 oC). X-ray powder diffraction, scanning electron microscopy, Mossbauer spectroscopy, laser light scattering, and thermal and electrochemical analyses were used to investigate the influence of different carboxylic acids as reducing agents and carbon sources on morphological and electrochemical properties of synthesized powders
PB  - Belgrade Univerzitet u Beogradu, Fakultet za fizičku hemiju
T1  - Morfološke i elektrohemijske karakteristike prahova LiFePO4 sintetisanih u prisustvu različitih karboksilnih kiselina
T1  - Morfological and electrochemical properties of LiFePO4 powders synthesized in presence of different carboxylic acids
UR  - https://hdl.handle.net/21.15107/rcub_dais_15988
ER  - 

@phdthesis{
editor = "Stojković Simatović, Ivana, Jugović, Dragana, Cvjetićanin, Nikola, Vujković, Milica",
author = "Kuzmanović, Maja",
year = "2017",
abstract = "Predmet istraživanja ove doktorske disertacije je ispitivanje mogućnosti dobijanja prahova litijum gvožđe(II) fosfata (LiFePO4) novim i modifikovanim načinima sinteze. Zahvaljujući svojoj sposobnosti da reverzibilno interkalira/deinterkalira jone litijuma ovaj materijal se koristi kao katoda u litijum jonskim baterijama. Osnovni cilj ovih istraživanja je bio da se dobije čist materijal bez prisustva nečistoća, koji će imati pogodne fizičkohemijske karakteristike za elektrohemijsku primenu. Parametri kristalne građe mogu značajno uticati na elektrohemijske osobine, tako da je cilj istraživanja bio da se ovaj uticaj razjasni i da se sintetišu materijali koji bi u ovom smislu imali najoptimalniju morfologiju i ostale mikrostrukturne osobine. Polazeći iz vodenih rastvora, koji su se sastojali od jona litijuma, gvožđa i fosfora pomešanih u odnosu koji zadovoljava stehiometriju LiFePO4 i odgovarajuće karboksilne kiseline, dobijene su prekursorske smeše mikroemulzionom metodom, koprecipitacijom i liofilizacijom koje su dalje termički tretirane. Prekursorska smeša dobijena mikroemulzionom metodom je solvotermalno tretirana na temperaturi od 180 oC, dok su prekursorske smeše dobijene koprecipitacijom i liofilizacijom termički tretirane na visokim temperaturama (600-800 oC) u cilju dobijanja kristalnog praha LiFePO4. Korišćenjem eksperimentalnih tehnika rendgenske difrakcije na prahu, skenirajuće elektronske mikroskopije, Mesbauerove spektroskopije, rasejanja laserske svetlosti, termičke analize i elektrohemijske analize ispitan je uticaj različitih karboksilnih kiselina kao redukcionog sredstva i izvora ugljenika na morfološke i elektrohemijske karakteristike sintetisanih prahova., The subject of this PhD thesis is investigation of possibility to synthesize lithium iron (II) phosphate (LiFePO4) powders with new and modified synthesis procedures. Due to its ability to reversibly intercalate/deintercalate lithium ions, this material is used as a cathode in lithium ion batteries. The main objective of this research was to synthesize pure material without any phase impurities, which would have appropriate physical chemical properties for electrochemical applications. Crystal lattice parameters can significantly influence electrochemical properties, and this thesis aim is to clarify this relation and to synthesize materials with optimal morphology and other microstructural properties. Starting from mixed aqueous solution of lithium, phosphorus and iron ions in stoichiometric ratio and different carboxylic acids, precursors mixtures were prepared by microemulsion, coprecipitation and lyophilisation techniques, and afterwards were thermally treated. To prepare crystal LiFePO4 powders, microemulsion-derived precursor mixture was solvothermally treated at 180 oC, while precursor mixtures obtained by coprecipitation and lyophilisation were thermally treated at high temperatures (600-800 oC). X-ray powder diffraction, scanning electron microscopy, Mossbauer spectroscopy, laser light scattering, and thermal and electrochemical analyses were used to investigate the influence of different carboxylic acids as reducing agents and carbon sources on morphological and electrochemical properties of synthesized powders",
publisher = "Belgrade Univerzitet u Beogradu, Fakultet za fizičku hemiju",
title = "Morfološke i elektrohemijske karakteristike prahova LiFePO4 sintetisanih u prisustvu različitih karboksilnih kiselina, Morfological and electrochemical properties of LiFePO4 powders synthesized in presence of different carboxylic acids",
url = "https://hdl.handle.net/21.15107/rcub_dais_15988"
}

Stojković Simatović, I., Jugović, D., Cvjetićanin, N., Vujković, M.,& Kuzmanović, M.. (2017). Morfološke i elektrohemijske karakteristike prahova LiFePO4 sintetisanih u prisustvu različitih karboksilnih kiselina. 
Belgrade Univerzitet u Beogradu, Fakultet za fizičku hemiju..
https://hdl.handle.net/21.15107/rcub_dais_15988

Stojković Simatović I, Jugović D, Cvjetićanin N, Vujković M, Kuzmanović M. Morfološke i elektrohemijske karakteristike prahova LiFePO4 sintetisanih u prisustvu različitih karboksilnih kiselina. 2017;.
https://hdl.handle.net/21.15107/rcub_dais_15988 .

Stojković Simatović, Ivana, Jugović, Dragana, Cvjetićanin, Nikola, Vujković, Milica, Kuzmanović, Maja, "Morfološke i elektrohemijske karakteristike prahova LiFePO4 sintetisanih u prisustvu različitih karboksilnih kiselina" (2017),
https://hdl.handle.net/21.15107/rcub_dais_15988 .

TY  - DATA
AU  - Bratić, Milan
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/5979
T2  - Journal of Alloys and Compounds
T1  - Supplementary material for the article: Bratić, M., Jugović, D., Mitrić, M., Cvjetićanin, N., 2017. Insertion of lithium ion in anatase TiO 2 nanotube arrays of different morphology. Journal of Alloys and Compounds 712, 90–96. https://doi.org/10.1016/j.jallcom.2017.04.065
UR  - https://hdl.handle.net/21.15107/rcub_dais_5979
ER  - 

@misc{
author = "Bratić, Milan and Jugović, Dragana and Mitrić, Miodrag and Cvjetićanin, Nikola",
year = "2017",
journal = "Journal of Alloys and Compounds",
title = "Supplementary material for the article: Bratić, M., Jugović, D., Mitrić, M., Cvjetićanin, N., 2017. Insertion of lithium ion in anatase TiO 2 nanotube arrays of different morphology. Journal of Alloys and Compounds 712, 90–96. https://doi.org/10.1016/j.jallcom.2017.04.065",
url = "https://hdl.handle.net/21.15107/rcub_dais_5979"
}

Bratić, M., Jugović, D., Mitrić, M.,& Cvjetićanin, N.. (2017). Supplementary material for the article: Bratić, M., Jugović, D., Mitrić, M., Cvjetićanin, N., 2017. Insertion of lithium ion in anatase TiO 2 nanotube arrays of different morphology. Journal of Alloys and Compounds 712, 90–96. https://doi.org/10.1016/j.jallcom.2017.04.065. in Journal of Alloys and Compounds.
https://hdl.handle.net/21.15107/rcub_dais_5979

Bratić M, Jugović D, Mitrić M, Cvjetićanin N. Supplementary material for the article: Bratić, M., Jugović, D., Mitrić, M., Cvjetićanin, N., 2017. Insertion of lithium ion in anatase TiO 2 nanotube arrays of different morphology. Journal of Alloys and Compounds 712, 90–96. https://doi.org/10.1016/j.jallcom.2017.04.065. in Journal of Alloys and Compounds. 2017;.
https://hdl.handle.net/21.15107/rcub_dais_5979 .

Bratić, Milan, Jugović, Dragana, Mitrić, Miodrag, Cvjetićanin, Nikola, "Supplementary material for the article: Bratić, M., Jugović, D., Mitrić, M., Cvjetićanin, N., 2017. Insertion of lithium ion in anatase TiO 2 nanotube arrays of different morphology. Journal of Alloys and Compounds 712, 90–96. https://doi.org/10.1016/j.jallcom.2017.04.065" in Journal of Alloys and Compounds (2017),
https://hdl.handle.net/21.15107/rcub_dais_5979 .

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Cvjetićanin, Nikola
AU  - Jokić, Bojan
AU  - Umićević, Ana
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/2352
AB  - Low intrinsic electronic conductivity is the main disadvantage of LiFePO4 when used as a cathode material in lithium ion batteries. The paper offers experimental proofs of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. The LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. The crystal structure refinements in the Pnma space group reveal that doping with fluorine ions preserves the olivine structure, while reducing both the lattice parameters and the antisite defect, and increasing the crystallite size. A small amount of incorporated fluorine enhances the electrical conductivity from 4.6×10−7 S cm−1 to 2.3×10−6 S cm−1 and has a positive impact on the electrochemical performance. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) reveal differences between the two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.
PB  - Elsevier
T2  - Ceramics International
T1  - The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder
SP  - 3224
EP  - 3230
VL  - 43
IS  - 3
DO  - 10.1016/j.ceramint.2016.11.149
UR  - https://hdl.handle.net/21.15107/rcub_dais_2352
ER  - 

@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Cvjetićanin, Nikola and Jokić, Bojan and Umićević, Ana and Uskoković, Dragan",
year = "2017",
abstract = "Low intrinsic electronic conductivity is the main disadvantage of LiFePO4 when used as a cathode material in lithium ion batteries. The paper offers experimental proofs of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. The LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. The crystal structure refinements in the Pnma space group reveal that doping with fluorine ions preserves the olivine structure, while reducing both the lattice parameters and the antisite defect, and increasing the crystallite size. A small amount of incorporated fluorine enhances the electrical conductivity from 4.6×10−7 S cm−1 to 2.3×10−6 S cm−1 and has a positive impact on the electrochemical performance. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) reveal differences between the two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder",
pages = "3224-3230",
volume = "43",
number = "3",
doi = "10.1016/j.ceramint.2016.11.149",
url = "https://hdl.handle.net/21.15107/rcub_dais_2352"
}

Jugović, D., Mitrić, M., Milović, M., Cvjetićanin, N., Jokić, B., Umićević, A.,& Uskoković, D.. (2017). The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder. in Ceramics International
Elsevier., 43(3), 3224-3230.
https://doi.org/10.1016/j.ceramint.2016.11.149
https://hdl.handle.net/21.15107/rcub_dais_2352

Jugović D, Mitrić M, Milović M, Cvjetićanin N, Jokić B, Umićević A, Uskoković D. The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder. in Ceramics International. 2017;43(3):3224-3230.
doi:10.1016/j.ceramint.2016.11.149
https://hdl.handle.net/21.15107/rcub_dais_2352 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Cvjetićanin, Nikola, Jokić, Bojan, Umićević, Ana, Uskoković, Dragan, "The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder" in Ceramics International, 43, no. 3 (2017):3224-3230,
https://doi.org/10.1016/j.ceramint.2016.11.149 .,
https://hdl.handle.net/21.15107/rcub_dais_2352 .

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Cvjetićanin, Nikola
AU  - Jokić, Bojan
AU  - Umićević, Ana
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15433
AB  - Low intrinsic electronic conductivity is the main disadvantage of LiFePO4 when used as a cathode material in lithium ion batteries. The paper offers experimental proofs of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. The LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. The crystal structure refinements in the Pnma space group reveal that doping with fluorine ions preserves the olivine structure, while reducing both the lattice parameters and the antisite defect, and increasing the crystallite size. A small amount of incorporated fluorine enhances the electrical conductivity from 4.6×10−7 S cm−1 to 2.3×10−6 S cm−1 and has a positive impact on the electrochemical performance. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) reveal differences between the two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.
PB  - Elsevier
T2  - Ceramics International
T1  - The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder
SP  - 3224
EP  - 3230
VL  - 43
IS  - 3
DO  - 10.1016/j.ceramint.2016.11.149
UR  - https://hdl.handle.net/21.15107/rcub_dais_15433
ER  - 

@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Cvjetićanin, Nikola and Jokić, Bojan and Umićević, Ana and Uskoković, Dragan",
year = "2017",
abstract = "Low intrinsic electronic conductivity is the main disadvantage of LiFePO4 when used as a cathode material in lithium ion batteries. The paper offers experimental proofs of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. The LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. The crystal structure refinements in the Pnma space group reveal that doping with fluorine ions preserves the olivine structure, while reducing both the lattice parameters and the antisite defect, and increasing the crystallite size. A small amount of incorporated fluorine enhances the electrical conductivity from 4.6×10−7 S cm−1 to 2.3×10−6 S cm−1 and has a positive impact on the electrochemical performance. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) reveal differences between the two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder",
pages = "3224-3230",
volume = "43",
number = "3",
doi = "10.1016/j.ceramint.2016.11.149",
url = "https://hdl.handle.net/21.15107/rcub_dais_15433"
}

Jugović, D., Mitrić, M., Milović, M., Cvjetićanin, N., Jokić, B., Umićević, A.,& Uskoković, D.. (2017). The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder. in Ceramics International
Elsevier., 43(3), 3224-3230.
https://doi.org/10.1016/j.ceramint.2016.11.149
https://hdl.handle.net/21.15107/rcub_dais_15433

Jugović D, Mitrić M, Milović M, Cvjetićanin N, Jokić B, Umićević A, Uskoković D. The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder. in Ceramics International. 2017;43(3):3224-3230.
doi:10.1016/j.ceramint.2016.11.149
https://hdl.handle.net/21.15107/rcub_dais_15433 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Cvjetićanin, Nikola, Jokić, Bojan, Umićević, Ana, Uskoković, Dragan, "The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder" in Ceramics International, 43, no. 3 (2017):3224-3230,
https://doi.org/10.1016/j.ceramint.2016.11.149 .,
https://hdl.handle.net/21.15107/rcub_dais_15433 .

TY  - JOUR
AU  - Bratić, Milan
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/4567
AB  - Anatase TiO2 nanotube arrays of different morphology were prepared by a two-step process: anodic oxidation at voltages 20–60 V and subsequent annealing at 400 °C. By amplifying anodization voltage the inner diameter of nanotubes increased. At 60 V nanotubes changed the shape from cylindrical tube to truncated cone with elliptical opening. Electrochemical insertion of Li-ion in nanotubes was studied by cyclic voltammetry and galvanostatic charge-discharge experiments. The cyclovoltammetric response was fast for all nanotube arrays. The galvanostatic areal charge/discharge capacity of nanotube arrays increased with increasing anodizaton voltage. Although the mass of nanotubes prepared at 45 V was larger, the gravimetrical capacity was much higher for nanotubes prepared at 60 V because of the larger surface area exposed to the electrolyte. Gravimetrical capacity values exceed theoretical bulk capacity of anatase due to the surface storage of Li-ion. Diffusion coefficient of Li-ion was calculated to be between 5.9·10−16 and 5.9·10−15 cm2 s−1.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology
SP  - 90
EP  - 96
VL  - 712
DO  - 10.1016/j.jallcom.2017.04.065
UR  - https://hdl.handle.net/21.15107/rcub_dais_4567
ER  - 

@article{
author = "Bratić, Milan and Jugović, Dragana and Mitrić, Miodrag and Cvjetićanin, Nikola",
year = "2017",
abstract = "Anatase TiO2 nanotube arrays of different morphology were prepared by a two-step process: anodic oxidation at voltages 20–60 V and subsequent annealing at 400 °C. By amplifying anodization voltage the inner diameter of nanotubes increased. At 60 V nanotubes changed the shape from cylindrical tube to truncated cone with elliptical opening. Electrochemical insertion of Li-ion in nanotubes was studied by cyclic voltammetry and galvanostatic charge-discharge experiments. The cyclovoltammetric response was fast for all nanotube arrays. The galvanostatic areal charge/discharge capacity of nanotube arrays increased with increasing anodizaton voltage. Although the mass of nanotubes prepared at 45 V was larger, the gravimetrical capacity was much higher for nanotubes prepared at 60 V because of the larger surface area exposed to the electrolyte. Gravimetrical capacity values exceed theoretical bulk capacity of anatase due to the surface storage of Li-ion. Diffusion coefficient of Li-ion was calculated to be between 5.9·10−16 and 5.9·10−15 cm2 s−1.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology",
pages = "90-96",
volume = "712",
doi = "10.1016/j.jallcom.2017.04.065",
url = "https://hdl.handle.net/21.15107/rcub_dais_4567"
}

Bratić, M., Jugović, D., Mitrić, M.,& Cvjetićanin, N.. (2017). Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology. in Journal of Alloys and Compounds
Elsevier., 712, 90-96.
https://doi.org/10.1016/j.jallcom.2017.04.065
https://hdl.handle.net/21.15107/rcub_dais_4567

Bratić M, Jugović D, Mitrić M, Cvjetićanin N. Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology. in Journal of Alloys and Compounds. 2017;712:90-96.
doi:10.1016/j.jallcom.2017.04.065
https://hdl.handle.net/21.15107/rcub_dais_4567 .

Bratić, Milan, Jugović, Dragana, Mitrić, Miodrag, Cvjetićanin, Nikola, "Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology" in Journal of Alloys and Compounds, 712 (2017):90-96,
https://doi.org/10.1016/j.jallcom.2017.04.065 .,
https://hdl.handle.net/21.15107/rcub_dais_4567 .

TY  - JOUR
AU  - Bratić, Milan
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/2332
AB  - Anatase TiO2 nanotube arrays of different morphology were prepared by a two-step process: anodic oxidation at voltages 20–60 V and subsequent annealing at 400 °C. By amplifying anodization voltage the inner diameter of nanotubes increased. At 60 V nanotubes changed the shape from cylindrical tube to truncated cone with elliptical opening. Electrochemical insertion of Li-ion in nanotubes was studied by cyclic voltammetry and galvanostatic charge-discharge experiments. The cyclovoltammetric response was fast for all nanotube arrays. The galvanostatic areal charge/discharge capacity of nanotube arrays increased with increasing anodizaton voltage. Although the mass of nanotubes prepared at 45 V was larger, the gravimetrical capacity was much higher for nanotubes prepared at 60 V because of the larger surface area exposed to the electrolyte. Gravimetrical capacity values exceed theoretical bulk capacity of anatase due to the surface storage of Li-ion. Diffusion coefficient of Li-ion was calculated to be between 5.9·10−16 and 5.9·10−15 cm2 s−1.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology
SP  - 90
EP  - 96
VL  - 712
DO  - 10.1016/j.jallcom.2017.04.065
UR  - https://hdl.handle.net/21.15107/rcub_dais_2332
ER  - 

@article{
author = "Bratić, Milan and Jugović, Dragana and Mitrić, Miodrag and Cvjetićanin, Nikola",
year = "2017",
abstract = "Anatase TiO2 nanotube arrays of different morphology were prepared by a two-step process: anodic oxidation at voltages 20–60 V and subsequent annealing at 400 °C. By amplifying anodization voltage the inner diameter of nanotubes increased. At 60 V nanotubes changed the shape from cylindrical tube to truncated cone with elliptical opening. Electrochemical insertion of Li-ion in nanotubes was studied by cyclic voltammetry and galvanostatic charge-discharge experiments. The cyclovoltammetric response was fast for all nanotube arrays. The galvanostatic areal charge/discharge capacity of nanotube arrays increased with increasing anodizaton voltage. Although the mass of nanotubes prepared at 45 V was larger, the gravimetrical capacity was much higher for nanotubes prepared at 60 V because of the larger surface area exposed to the electrolyte. Gravimetrical capacity values exceed theoretical bulk capacity of anatase due to the surface storage of Li-ion. Diffusion coefficient of Li-ion was calculated to be between 5.9·10−16 and 5.9·10−15 cm2 s−1.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology",
pages = "90-96",
volume = "712",
doi = "10.1016/j.jallcom.2017.04.065",
url = "https://hdl.handle.net/21.15107/rcub_dais_2332"
}

Bratić, M., Jugović, D., Mitrić, M.,& Cvjetićanin, N.. (2017). Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology. in Journal of Alloys and Compounds
Elsevier., 712, 90-96.
https://doi.org/10.1016/j.jallcom.2017.04.065
https://hdl.handle.net/21.15107/rcub_dais_2332

Bratić M, Jugović D, Mitrić M, Cvjetićanin N. Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology. in Journal of Alloys and Compounds. 2017;712:90-96.
doi:10.1016/j.jallcom.2017.04.065
https://hdl.handle.net/21.15107/rcub_dais_2332 .

Bratić, Milan, Jugović, Dragana, Mitrić, Miodrag, Cvjetićanin, Nikola, "Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology" in Journal of Alloys and Compounds, 712 (2017):90-96,
https://doi.org/10.1016/j.jallcom.2017.04.065 .,
https://hdl.handle.net/21.15107/rcub_dais_2332 .

TY  - CONF
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15439
AB  - The search for alternative cathode materials for Li-ion batteries has recently emerged Li2FeP2O7 pyrophosphate as a new potential competitor for LiFePO4 material. It has a possibility to offer good rate capability, lithium ion diffusivity and volumetric energy density, and is a material of high safety and low raw materials cost. In addition, there is the probability of releasing the second Li-atom at a higher redox potential of 5.2 V, where the theoretical capacity would reach 220 mAhg−1. Optimized solid state reaction is used for the synthesis of pure Li2FeP2O7 powder and a composite Li2FeP2O7/C. The synthesized powders are characterized by X-ray powder diffraction, field emission scanning electron microscopy, FTIR spectroscopy, and galvanostatic charge/discharge cycling.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
T1  - Synthesis and characterization of Li2FeP2O7 cathode material
SP  - 46
EP  - 46
UR  - https://hdl.handle.net/21.15107/rcub_dais_15439
ER  - 

@conference{
author = "Jugović, Dragana and Milović, Miloš and Mitrić, Miodrag and Cvjetićanin, Nikola and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2017",
abstract = "The search for alternative cathode materials for Li-ion batteries has recently emerged Li2FeP2O7 pyrophosphate as a new potential competitor for LiFePO4 material. It has a possibility to offer good rate capability, lithium ion diffusivity and volumetric energy density, and is a material of high safety and low raw materials cost. In addition, there is the probability of releasing the second Li-atom at a higher redox potential of 5.2 V, where the theoretical capacity would reach 220 mAhg−1. Optimized solid state reaction is used for the synthesis of pure Li2FeP2O7 powder and a composite Li2FeP2O7/C. The synthesized powders are characterized by X-ray powder diffraction, field emission scanning electron microscopy, FTIR spectroscopy, and galvanostatic charge/discharge cycling.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
title = "Synthesis and characterization of Li2FeP2O7 cathode material",
pages = "46-46",
url = "https://hdl.handle.net/21.15107/rcub_dais_15439"
}

Jugović, D., Milović, M., Mitrić, M., Cvjetićanin, N., Škapin, S. D.,& Uskoković, D.. (2017). Synthesis and characterization of Li2FeP2O7 cathode material. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 46-46.
https://hdl.handle.net/21.15107/rcub_dais_15439

Jugović D, Milović M, Mitrić M, Cvjetićanin N, Škapin SD, Uskoković D. Synthesis and characterization of Li2FeP2O7 cathode material. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:46-46.
https://hdl.handle.net/21.15107/rcub_dais_15439 .

Jugović, Dragana, Milović, Miloš, Mitrić, Miodrag, Cvjetićanin, Nikola, Škapin, Srečo Davor, Uskoković, Dragan, "Synthesis and characterization of Li2FeP2O7 cathode material" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):46-46,
https://hdl.handle.net/21.15107/rcub_dais_15439 .

TY  - CONF
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Cvjetićanin, Nikola
AU  - Jokić, Bojan
AU  - Umićević, Ana
AU  - Uskoković, Dragan
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/898
AB  - Low intrinsic electronic conductivity is the main weakness of LiFePO4 for the use as cathode material in lithium ion batteries. Here is presented an experimental proof of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. Crystal structure refinements in the space group Pnma reveal that doping with fluorine ions preserves olivine structure with the reduction of both the lattice parameters and the antisite defect, and an increase of a crystallite size. A small amount of incorporated fluorine enhances electrical conductivity from 4.6 × 10-7 Scm-1 to 2.3 × 10-6 Scm-1 and has positive impact on the electrochemical performances. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) disclose differences between two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
T1  - The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder
SP  - 35
EP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_dais_898
ER  - 

@conference{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Cvjetićanin, Nikola and Jokić, Bojan and Umićević, Ana and Uskoković, Dragan",
year = "2016",
abstract = "Low intrinsic electronic conductivity is the main weakness of LiFePO4 for the use as cathode material in lithium ion batteries. Here is presented an experimental proof of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. Crystal structure refinements in the space group Pnma reveal that doping with fluorine ions preserves olivine structure with the reduction of both the lattice parameters and the antisite defect, and an increase of a crystallite size. A small amount of incorporated fluorine enhances electrical conductivity from 4.6 × 10-7 Scm-1 to 2.3 × 10-6 Scm-1 and has positive impact on the electrochemical performances. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) disclose differences between two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016",
title = "The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder",
pages = "35-35",
url = "https://hdl.handle.net/21.15107/rcub_dais_898"
}

Jugović, D., Mitrić, M., Milović, M., Cvjetićanin, N., Jokić, B., Umićević, A.,& Uskoković, D.. (2016). The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016
Belgrade : Materials Research Society of Serbia., 35-35.
https://hdl.handle.net/21.15107/rcub_dais_898

Jugović D, Mitrić M, Milović M, Cvjetićanin N, Jokić B, Umićević A, Uskoković D. The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder. in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016. 2016;:35-35.
https://hdl.handle.net/21.15107/rcub_dais_898 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Cvjetićanin, Nikola, Jokić, Bojan, Umićević, Ana, Uskoković, Dragan, "The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder" in Programme and The Book of Abstracts / Eighteenth Annual Conference YUCOMAT 2016, Herceg Novi, September 5-10, 2016 (2016):35-35,
https://hdl.handle.net/21.15107/rcub_dais_898 .

TY  - JOUR
AU  - Kuzmanović, Maja
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Jokić, Bojan
AU  - Cvjetićanin, Nikola
AU  - Uskoković, Dragan
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/15434
AB  - Olivine-type LiFePO4 composite powders with carbon were synthesized by freeze drying and subsequent thermal annealing. The main purpose of the research is to explore how various dicarboxylic acids as carbon sources influence the electrochemical properties of the resulting composites. Three dicarboxylic acids (oxalic, malonic, and adipic) were used as a carbon source. The synthesis was followed by X-ray powder diffraction, scanning electron microscopy, particle-size analysis, and electrochemical experiments. It is shown that the amount of the in situ formed carbon depends on the thermal behaviour of the acids in inert atmosphere rather than on their carbon content. Cyclic voltammetry experiments and galvanostatic cycling illustrate the behaviour of different powders: the powder obtained with oxalic acid yields the highest discharge capacity at small currents, while the one obtained with adipic acid shows better high-current response. Malonic acid has turned out to be a poor carbon source and it consequently yields powder with poor electrochemical performance.
PB  - Elsevier
T2  - Ceramics International
T1  - The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite
SP  - 6753
EP  - 6758
VL  - 41
IS  - 5, Part B
DO  - 10.1016/j.ceramint.2015.01.121
UR  - https://hdl.handle.net/21.15107/rcub_dais_15434
ER  - 

@article{
author = "Kuzmanović, Maja and Jugović, Dragana and Mitrić, Miodrag and Jokić, Bojan and Cvjetićanin, Nikola and Uskoković, Dragan",
year = "2015",
abstract = "Olivine-type LiFePO4 composite powders with carbon were synthesized by freeze drying and subsequent thermal annealing. The main purpose of the research is to explore how various dicarboxylic acids as carbon sources influence the electrochemical properties of the resulting composites. Three dicarboxylic acids (oxalic, malonic, and adipic) were used as a carbon source. The synthesis was followed by X-ray powder diffraction, scanning electron microscopy, particle-size analysis, and electrochemical experiments. It is shown that the amount of the in situ formed carbon depends on the thermal behaviour of the acids in inert atmosphere rather than on their carbon content. Cyclic voltammetry experiments and galvanostatic cycling illustrate the behaviour of different powders: the powder obtained with oxalic acid yields the highest discharge capacity at small currents, while the one obtained with adipic acid shows better high-current response. Malonic acid has turned out to be a poor carbon source and it consequently yields powder with poor electrochemical performance.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite",
pages = "6753-6758",
volume = "41",
number = "5, Part B",
doi = "10.1016/j.ceramint.2015.01.121",
url = "https://hdl.handle.net/21.15107/rcub_dais_15434"
}

Kuzmanović, M., Jugović, D., Mitrić, M., Jokić, B., Cvjetićanin, N.,& Uskoković, D.. (2015). The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite. in Ceramics International
Elsevier., 41(5, Part B), 6753-6758.
https://doi.org/10.1016/j.ceramint.2015.01.121
https://hdl.handle.net/21.15107/rcub_dais_15434

Kuzmanović M, Jugović D, Mitrić M, Jokić B, Cvjetićanin N, Uskoković D. The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite. in Ceramics International. 2015;41(5, Part B):6753-6758.
doi:10.1016/j.ceramint.2015.01.121
https://hdl.handle.net/21.15107/rcub_dais_15434 .

Kuzmanović, Maja, Jugović, Dragana, Mitrić, Miodrag, Jokić, Bojan, Cvjetićanin, Nikola, Uskoković, Dragan, "The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite" in Ceramics International, 41, no. 5, Part B (2015):6753-6758,
https://doi.org/10.1016/j.ceramint.2015.01.121 .,
https://hdl.handle.net/21.15107/rcub_dais_15434 .

TY  - JOUR
AU  - Kuzmanović, Maja
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Jokić, Bojan
AU  - Cvjetićanin, Nikola
AU  - Uskoković, Dragan
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/2590
AB  - Olivine-type LiFePO4 composite powders with carbon were synthesized by freeze drying and subsequent thermal annealing. The main purpose of the research is to explore how various dicarboxylic acids as carbon sources influence the electrochemical properties of the resulting composites. Three dicarboxylic acids (oxalic, malonic, and adipic) were used as a carbon source. The synthesis was followed by X-ray powder diffraction, scanning electron microscopy, particle-size analysis, and electrochemical experiments. It is shown that the amount of the in situ formed carbon depends on the thermal behaviour of the acids in inert atmosphere rather than on their carbon content. Cyclic voltammetry experiments and galvanostatic cycling illustrate the behaviour of different powders: the powder obtained with oxalic acid yields the highest discharge capacity at small currents, while the one obtained with adipic acid shows better high-current response. Malonic acid has turned out to be a poor carbon source and it consequently yields powder with poor electrochemical performance. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite
SP  - 6753
EP  - 6758
VL  - 41
IS  - 5
DO  - 10.1016/j.ceramint.2015.01.121
UR  - https://hdl.handle.net/21.15107/rcub_dais_2590
ER  - 

@article{
author = "Kuzmanović, Maja and Jugović, Dragana and Mitrić, Miodrag and Jokić, Bojan and Cvjetićanin, Nikola and Uskoković, Dragan",
year = "2015",
abstract = "Olivine-type LiFePO4 composite powders with carbon were synthesized by freeze drying and subsequent thermal annealing. The main purpose of the research is to explore how various dicarboxylic acids as carbon sources influence the electrochemical properties of the resulting composites. Three dicarboxylic acids (oxalic, malonic, and adipic) were used as a carbon source. The synthesis was followed by X-ray powder diffraction, scanning electron microscopy, particle-size analysis, and electrochemical experiments. It is shown that the amount of the in situ formed carbon depends on the thermal behaviour of the acids in inert atmosphere rather than on their carbon content. Cyclic voltammetry experiments and galvanostatic cycling illustrate the behaviour of different powders: the powder obtained with oxalic acid yields the highest discharge capacity at small currents, while the one obtained with adipic acid shows better high-current response. Malonic acid has turned out to be a poor carbon source and it consequently yields powder with poor electrochemical performance. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite",
pages = "6753-6758",
volume = "41",
number = "5",
doi = "10.1016/j.ceramint.2015.01.121",
url = "https://hdl.handle.net/21.15107/rcub_dais_2590"
}

Kuzmanović, M., Jugović, D., Mitrić, M., Jokić, B., Cvjetićanin, N.,& Uskoković, D.. (2015). The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite. in Ceramics International, 41(5), 6753-6758.
https://doi.org/10.1016/j.ceramint.2015.01.121
https://hdl.handle.net/21.15107/rcub_dais_2590

Kuzmanović M, Jugović D, Mitrić M, Jokić B, Cvjetićanin N, Uskoković D. The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite. in Ceramics International. 2015;41(5):6753-6758.
doi:10.1016/j.ceramint.2015.01.121
https://hdl.handle.net/21.15107/rcub_dais_2590 .

Kuzmanović, Maja, Jugović, Dragana, Mitrić, Miodrag, Jokić, Bojan, Cvjetićanin, Nikola, Uskoković, Dragan, "The use of various dicarboxylic acids as a carbon source for the preparation of LiFePO4/C composite" in Ceramics International, 41, no. 5 (2015):6753-6758,
https://doi.org/10.1016/j.ceramint.2015.01.121 .,
https://hdl.handle.net/21.15107/rcub_dais_2590 .

TY  - CONF
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
AU  - Avdeev, Maxim
AU  - Jokić, Bojan
AU  - Uskoković, Dragan
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/827
AB  - The room temperature Na-ion secondary battery has been under focus lately due to its feasibility to compete against the already well-established Li-ion secondary battery. Transition metal oxides of general formula NaxMO2 have been investigated as potential cathode materials for sodium batteries. Layered NaxCoO2 is synthesized via solid-state method at 900 ºC in air atmosphere. Fluorine doping of the as-prepared powder is established by the use of ammonium hydrogen difluoride (NH4HF2) as a fluorinating agent. The fluorination takes place only at low temperature (200 ºC), while the treatment at higher temperatures (≥ 400 ºC) facilitates the formation of NaF. It is shown that various and controllable amounts of fluorine can be successfully incorporated into the structure. Finally, the effects of fluorine doping on both structural and electrochemical properties are examined.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015
T1  - Fluorine Doping of Layered NaxCoO2 Structure
SP  - 12
EP  - 12
UR  - https://hdl.handle.net/21.15107/rcub_dais_827
ER  - 

@conference{
author = "Jugović, Dragana and Milović, Miloš and Mitrić, Miodrag and Cvjetićanin, Nikola and Avdeev, Maxim and Jokić, Bojan and Uskoković, Dragan",
year = "2015",
abstract = "The room temperature Na-ion secondary battery has been under focus lately due to its feasibility to compete against the already well-established Li-ion secondary battery. Transition metal oxides of general formula NaxMO2 have been investigated as potential cathode materials for sodium batteries. Layered NaxCoO2 is synthesized via solid-state method at 900 ºC in air atmosphere. Fluorine doping of the as-prepared powder is established by the use of ammonium hydrogen difluoride (NH4HF2) as a fluorinating agent. The fluorination takes place only at low temperature (200 ºC), while the treatment at higher temperatures (≥ 400 ºC) facilitates the formation of NaF. It is shown that various and controllable amounts of fluorine can be successfully incorporated into the structure. Finally, the effects of fluorine doping on both structural and electrochemical properties are examined.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015",
title = "Fluorine Doping of Layered NaxCoO2 Structure",
pages = "12-12",
url = "https://hdl.handle.net/21.15107/rcub_dais_827"
}

Jugović, D., Milović, M., Mitrić, M., Cvjetićanin, N., Avdeev, M., Jokić, B.,& Uskoković, D.. (2015). Fluorine Doping of Layered NaxCoO2 Structure. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015
Belgrade : Materials Research Society of Serbia., 12-12.
https://hdl.handle.net/21.15107/rcub_dais_827

Jugović D, Milović M, Mitrić M, Cvjetićanin N, Avdeev M, Jokić B, Uskoković D. Fluorine Doping of Layered NaxCoO2 Structure. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015. 2015;:12-12.
https://hdl.handle.net/21.15107/rcub_dais_827 .

Jugović, Dragana, Milović, Miloš, Mitrić, Miodrag, Cvjetićanin, Nikola, Avdeev, Maxim, Jokić, Bojan, Uskoković, Dragan, "Fluorine Doping of Layered NaxCoO2 Structure" in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015 (2015):12-12,
https://hdl.handle.net/21.15107/rcub_dais_827 .

TY  - CONF
AU  - Garaj, Andrej
AU  - Cvjetićanin, Nikola
AU  - Marković, Smilja
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/834
AB  - Due to specific dielectric and ferroelectric properties, functional ceramics based on barium titanate (BaTiO3) have found application in semiconductor industries. Appropriate electrical properties of barium titanate-based materials, such as magnitude of relative dielectric permittivity and the Curie temperature, could be achieved by varying the sintering conditions (which influenced ceramics’ microstructure) and/or by doping with various cations. Here, we investigated an influence of sintering atmosphere (air and argon) on the crystal structure, microstructure, and dielectric properties of barium titanate-stannate (BTS; BaTi1-xSnxO3) ceramics. The BTS powders (with x = 0, 0.05 and 0.1; denoted BT, BTS5 and BTS 10, respectively) were synthesized by solid-state reaction technique. In the following, the powders were uniaxially pressed (P = 240 MPa) into cylindrical compacts (Ø6 mm and h approx. 2 mm) and sintered in SETSYS TMA (Setaram Instrumentation, Caluire, France) by heating rate of 10 °/min up 1420 °C and with dwell time of 2 hours. To establish the influence of a sintering atmosphere two sets of experiments were performed: (1) in air, and (2) in Ar. During sintering, the shrinkage was recorded in axial (h) direction. The crystal structure of BTS ceramics were studied at room temperature by X-ray diffractometry and Raman spectroscopy. The microstructure and chemical (Ti/Sn) composition were examined by SEM–EDS methods. The electrical measurements were made in air, at 1 kHz using a Wayne Kerr Universal Bridge B224; the measurements were done in cooling, from 160 to 20 °C. A profound effect of argon atmosphere on the magnitude of relative dielectric permittivity of sintered BTS ceramics has been found.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia
T1  - The crystal structure, microstructure, and dielectric properties of BaTi1-xSnxO3 (x = 0,0.05 and 0.1) ceramics sintered in different atmospheres (air and Ar)
SP  - 40
EP  - 40
UR  - https://hdl.handle.net/21.15107/rcub_dais_834
ER  - 

@conference{
author = "Garaj, Andrej and Cvjetićanin, Nikola and Marković, Smilja",
year = "2015",
abstract = "Due to specific dielectric and ferroelectric properties, functional ceramics based on barium titanate (BaTiO3) have found application in semiconductor industries. Appropriate electrical properties of barium titanate-based materials, such as magnitude of relative dielectric permittivity and the Curie temperature, could be achieved by varying the sintering conditions (which influenced ceramics’ microstructure) and/or by doping with various cations. Here, we investigated an influence of sintering atmosphere (air and argon) on the crystal structure, microstructure, and dielectric properties of barium titanate-stannate (BTS; BaTi1-xSnxO3) ceramics. The BTS powders (with x = 0, 0.05 and 0.1; denoted BT, BTS5 and BTS 10, respectively) were synthesized by solid-state reaction technique. In the following, the powders were uniaxially pressed (P = 240 MPa) into cylindrical compacts (Ø6 mm and h approx. 2 mm) and sintered in SETSYS TMA (Setaram Instrumentation, Caluire, France) by heating rate of 10 °/min up 1420 °C and with dwell time of 2 hours. To establish the influence of a sintering atmosphere two sets of experiments were performed: (1) in air, and (2) in Ar. During sintering, the shrinkage was recorded in axial (h) direction. The crystal structure of BTS ceramics were studied at room temperature by X-ray diffractometry and Raman spectroscopy. The microstructure and chemical (Ti/Sn) composition were examined by SEM–EDS methods. The electrical measurements were made in air, at 1 kHz using a Wayne Kerr Universal Bridge B224; the measurements were done in cooling, from 160 to 20 °C. A profound effect of argon atmosphere on the magnitude of relative dielectric permittivity of sintered BTS ceramics has been found.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia",
title = "The crystal structure, microstructure, and dielectric properties of BaTi1-xSnxO3 (x = 0,0.05 and 0.1) ceramics sintered in different atmospheres (air and Ar)",
pages = "40-40",
url = "https://hdl.handle.net/21.15107/rcub_dais_834"
}

Garaj, A., Cvjetićanin, N.,& Marković, S.. (2015). The crystal structure, microstructure, and dielectric properties of BaTi1-xSnxO3 (x = 0,0.05 and 0.1) ceramics sintered in different atmospheres (air and Ar). in Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 40-40.
https://hdl.handle.net/21.15107/rcub_dais_834

Garaj A, Cvjetićanin N, Marković S. The crystal structure, microstructure, and dielectric properties of BaTi1-xSnxO3 (x = 0,0.05 and 0.1) ceramics sintered in different atmospheres (air and Ar). in Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia. 2015;:40-40.
https://hdl.handle.net/21.15107/rcub_dais_834 .

Garaj, Andrej, Cvjetićanin, Nikola, Marković, Smilja, "The crystal structure, microstructure, and dielectric properties of BaTi1-xSnxO3 (x = 0,0.05 and 0.1) ceramics sintered in different atmospheres (air and Ar)" in Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia (2015):40-40,
https://hdl.handle.net/21.15107/rcub_dais_834 .

TY  - CONF
AU  - Marković, Smilja
AU  - Veselinović, Ljiljana
AU  - Garaj, Andrej
AU  - Cvjetićanin, Nikola
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/828
AB  - Due to specific dielectric and ferroelectric properties, functional ceramics based on barium titanate (BaTiO3) have found application in semiconductor industries. Appropriate electrical properties of barium titanate-based materials, such as magnitude of relative dielectric permittivity and the Curie temperature, can be achieved by varying sintering conditions (which influenced ceramics’ microstructure) and/or by doping with various cations.
In this study, we investigated the influence of sintering atmosphere (air and argon) on the crystal structure, microstructure, dielectric and optical properties of barium titanate-stannate (BTS; BaTi1-xSnxO3) ceramics. The BTS powders (with x = 0, 0.05 and 0.1; denoted BT, BTS5 and BTS 10, respectively) were synthesized by the solid-state reaction technique. The powders were subsequently uniaxially pressed (P = 240 MPa) into cylindrical compacts (ø 6 mm and h ≈ 2 mm) and sintered in SETSYS TMA (Setaram Instrumentation, Caluire, France). Sintering experiments were performed at a heating rate of 10 °/min up 1420 °C and with a dwell time of 2 hours; to determine the influence of sintering atmosphere, two sets of experiments were performed: (1) in air, and (2) in Ar. During sintering, the shrinkage was recorded in the axial (h) direction. The crystal structure of the BTS ceramics was studied at room temperature by X-ray diffractometry and Raman spectroscopy. The microstructure and chemical (Ti/Sn) composition were examined by SEM–EDS methods. The electrical measurements were made in air, at 1 kHz using a Wayne Kerr Universal Bridge B224; the measurements were done in cooling, from 160 to 20 °C. For optical characterization UV-Vis diffusive reflectance and photoluminescence spectroscopy were employed. A profound effect of an argon atmosphere on the examined properties of the sintered BTS ceramics has been found; the mostly important is an increase of the magnitude of relative dielectric permittivity.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015
T1  - Influence of Sintering Atmosphere on the Crystal Structure, Microstructure, Dielectric and Optical Properties of BaTi1-xSnxO3 (x = 0, 0.05 and 0.1) Ceramics
SP  - 14
EP  - 14
UR  - https://hdl.handle.net/21.15107/rcub_dais_828
ER  - 

@conference{
author = "Marković, Smilja and Veselinović, Ljiljana and Garaj, Andrej and Cvjetićanin, Nikola and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2015",
abstract = "Due to specific dielectric and ferroelectric properties, functional ceramics based on barium titanate (BaTiO3) have found application in semiconductor industries. Appropriate electrical properties of barium titanate-based materials, such as magnitude of relative dielectric permittivity and the Curie temperature, can be achieved by varying sintering conditions (which influenced ceramics’ microstructure) and/or by doping with various cations.
In this study, we investigated the influence of sintering atmosphere (air and argon) on the crystal structure, microstructure, dielectric and optical properties of barium titanate-stannate (BTS; BaTi1-xSnxO3) ceramics. The BTS powders (with x = 0, 0.05 and 0.1; denoted BT, BTS5 and BTS 10, respectively) were synthesized by the solid-state reaction technique. The powders were subsequently uniaxially pressed (P = 240 MPa) into cylindrical compacts (ø 6 mm and h ≈ 2 mm) and sintered in SETSYS TMA (Setaram Instrumentation, Caluire, France). Sintering experiments were performed at a heating rate of 10 °/min up 1420 °C and with a dwell time of 2 hours; to determine the influence of sintering atmosphere, two sets of experiments were performed: (1) in air, and (2) in Ar. During sintering, the shrinkage was recorded in the axial (h) direction. The crystal structure of the BTS ceramics was studied at room temperature by X-ray diffractometry and Raman spectroscopy. The microstructure and chemical (Ti/Sn) composition were examined by SEM–EDS methods. The electrical measurements were made in air, at 1 kHz using a Wayne Kerr Universal Bridge B224; the measurements were done in cooling, from 160 to 20 °C. For optical characterization UV-Vis diffusive reflectance and photoluminescence spectroscopy were employed. A profound effect of an argon atmosphere on the examined properties of the sintered BTS ceramics has been found; the mostly important is an increase of the magnitude of relative dielectric permittivity.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015",
title = "Influence of Sintering Atmosphere on the Crystal Structure, Microstructure, Dielectric and Optical Properties of BaTi1-xSnxO3 (x = 0, 0.05 and 0.1) Ceramics",
pages = "14-14",
url = "https://hdl.handle.net/21.15107/rcub_dais_828"
}

Marković, S., Veselinović, L., Garaj, A., Cvjetićanin, N., Škapin, S. D.,& Uskoković, D.. (2015). Influence of Sintering Atmosphere on the Crystal Structure, Microstructure, Dielectric and Optical Properties of BaTi1-xSnxO3 (x = 0, 0.05 and 0.1) Ceramics. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015
Belgrade : Materials Research Society of Serbia., 14-14.
https://hdl.handle.net/21.15107/rcub_dais_828

Marković S, Veselinović L, Garaj A, Cvjetićanin N, Škapin SD, Uskoković D. Influence of Sintering Atmosphere on the Crystal Structure, Microstructure, Dielectric and Optical Properties of BaTi1-xSnxO3 (x = 0, 0.05 and 0.1) Ceramics. in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015. 2015;:14-14.
https://hdl.handle.net/21.15107/rcub_dais_828 .

Marković, Smilja, Veselinović, Ljiljana, Garaj, Andrej, Cvjetićanin, Nikola, Škapin, Srečo Davor, Uskoković, Dragan, "Influence of Sintering Atmosphere on the Crystal Structure, Microstructure, Dielectric and Optical Properties of BaTi1-xSnxO3 (x = 0, 0.05 and 0.1) Ceramics" in Programme and The Book of Abstracts / Seventeenth Annual Conference YUCOMAT 205, Herceg Novi, August 31– September 4, 2015 (2015):14-14,
https://hdl.handle.net/21.15107/rcub_dais_828 .

TY  - JOUR
AU  - Kuzmanović, Maja
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Jokić, Bojan
AU  - Cvjetićanin, Nikola
AU  - Uskoković, Dragoljub P.
PY  - 2014
UR  - http://www.ncbi.nlm.nih.gov/pubmed/0040-21761403373K
UR  - https://dais.sanu.ac.rs/123456789/11624
AB  - Lithium iron phosphate is a promising cathode material for lithium ion battery application thanks to its good characteristics. Here is presented the freeze drying method for the preparation of carbon coated LiFePO4, where PVP is used as a carbon source. The main advantage of this method is mixing at the atomic level and introducing the carbon source into the precursor solution. The synthesis process can be divided into three stages: freezing of a precursor solution, drying under vacuum until water evaporates and calicination of as-dried powder at slightly reductive atmosphere. Powder X-ray diffraction measurement demonstrated single phase LiFePO4 with crystallite size of 45.8 nm. Morphology and particle size was revealed with scanning electron microscopy and particle size analyzer. Galvanostatic cycling from 2.3 to 4.1 V vs. Li/Li+, shows typical LiFePO4 redox behavior with plateau at 3.4 V. The discharge capacity value obtained at C/10 rate was 154 mAh- 1, with decrease on greater C-rates.
PB  - Belgrade : Union of Engineers and Technicians of Serbia
T2  - Tehnika
T1  - Sinteza i karakterizacija LiFePo4/C katodnog materijala dobijenog pomoću postupka liofilizacije u prisustvu PVP-a
T1  - Synthesis and characterization of LiFePo4/C cathode material by freeze drying method with PVP
SP  - 373
EP  - 376
VL  - 69
IS  - 3
DO  - 10.5937/tehnika1403373K
UR  - https://hdl.handle.net/21.15107/rcub_dais_11624
ER  - 

@article{
author = "Kuzmanović, Maja and Jugović, Dragana and Mitrić, Miodrag and Jokić, Bojan and Cvjetićanin, Nikola and Uskoković, Dragoljub P.",
year = "2014",
abstract = "Lithium iron phosphate is a promising cathode material for lithium ion battery application thanks to its good characteristics. Here is presented the freeze drying method for the preparation of carbon coated LiFePO4, where PVP is used as a carbon source. The main advantage of this method is mixing at the atomic level and introducing the carbon source into the precursor solution. The synthesis process can be divided into three stages: freezing of a precursor solution, drying under vacuum until water evaporates and calicination of as-dried powder at slightly reductive atmosphere. Powder X-ray diffraction measurement demonstrated single phase LiFePO4 with crystallite size of 45.8 nm. Morphology and particle size was revealed with scanning electron microscopy and particle size analyzer. Galvanostatic cycling from 2.3 to 4.1 V vs. Li/Li+, shows typical LiFePO4 redox behavior with plateau at 3.4 V. The discharge capacity value obtained at C/10 rate was 154 mAh- 1, with decrease on greater C-rates.",
publisher = "Belgrade : Union of Engineers and Technicians of Serbia",
journal = "Tehnika",
title = "Sinteza i karakterizacija LiFePo4/C katodnog materijala dobijenog pomoću postupka liofilizacije u prisustvu PVP-a, Synthesis and characterization of LiFePo4/C cathode material by freeze drying method with PVP",
pages = "373-376",
volume = "69",
number = "3",
doi = "10.5937/tehnika1403373K",
url = "https://hdl.handle.net/21.15107/rcub_dais_11624"
}

Kuzmanović, M., Jugović, D., Mitrić, M., Jokić, B., Cvjetićanin, N.,& Uskoković, D. P.. (2014). Sinteza i karakterizacija LiFePo4/C katodnog materijala dobijenog pomoću postupka liofilizacije u prisustvu PVP-a. in Tehnika
Belgrade : Union of Engineers and Technicians of Serbia., 69(3), 373-376.
https://doi.org/10.5937/tehnika1403373K
https://hdl.handle.net/21.15107/rcub_dais_11624

Kuzmanović M, Jugović D, Mitrić M, Jokić B, Cvjetićanin N, Uskoković DP. Sinteza i karakterizacija LiFePo4/C katodnog materijala dobijenog pomoću postupka liofilizacije u prisustvu PVP-a. in Tehnika. 2014;69(3):373-376.
doi:10.5937/tehnika1403373K
https://hdl.handle.net/21.15107/rcub_dais_11624 .

Kuzmanović, Maja, Jugović, Dragana, Mitrić, Miodrag, Jokić, Bojan, Cvjetićanin, Nikola, Uskoković, Dragoljub P., "Sinteza i karakterizacija LiFePo4/C katodnog materijala dobijenog pomoću postupka liofilizacije u prisustvu PVP-a" in Tehnika, 69, no. 3 (2014):373-376,
https://doi.org/10.5937/tehnika1403373K .,
https://hdl.handle.net/21.15107/rcub_dais_11624 .

TY  - CONF
AU  - Milović, Miloš
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
AU  - Mraković, Ana
AU  - Senna, Mamoru
AU  - Uskoković, Dragan
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/582
AB  - Mechanical activation can be regarded as a multi-step process with changes in the energetic parameters and the amount of accumulated energy of solids in each step. Here we report the influence of mechanochemical processing on the synthesis of LiFePO4 powders. The different precursor powders were milled in a planetary mill by using WC vials and 5 mm balls made of the same material. A slightly reductive atmosphere (Ar + 5%H2) was used in both mechanical stressing and thermal annealing so as to prevent the oxidation of iron. All synthesis steps were followed by an X-ray diffractometry and FT-IR spectroscopy. The results were compared with previous findings of precipitated and annealed powder, without mechanochemical treatment.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
T1  - Synthesis of LiFePO4 by mechanical stressing and thermal annealing
SP  - 62
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_dais_582
ER  - 

@conference{
author = "Milović, Miloš and Jugović, Dragana and Mitrić, Miodrag and Cvjetićanin, Nikola and Mraković, Ana and Senna, Mamoru and Uskoković, Dragan",
year = "2014",
abstract = "Mechanical activation can be regarded as a multi-step process with changes in the energetic parameters and the amount of accumulated energy of solids in each step. Here we report the influence of mechanochemical processing on the synthesis of LiFePO4 powders. The different precursor powders were milled in a planetary mill by using WC vials and 5 mm balls made of the same material. A slightly reductive atmosphere (Ar + 5%H2) was used in both mechanical stressing and thermal annealing so as to prevent the oxidation of iron. All synthesis steps were followed by an X-ray diffractometry and FT-IR spectroscopy. The results were compared with previous findings of precipitated and annealed powder, without mechanochemical treatment.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts",
title = "Synthesis of LiFePO4 by mechanical stressing and thermal annealing",
pages = "62-62",
url = "https://hdl.handle.net/21.15107/rcub_dais_582"
}

Milović, M., Jugović, D., Mitrić, M., Cvjetićanin, N., Mraković, A., Senna, M.,& Uskoković, D.. (2014). Synthesis of LiFePO4 by mechanical stressing and thermal annealing. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 62-62.
https://hdl.handle.net/21.15107/rcub_dais_582

Milović M, Jugović D, Mitrić M, Cvjetićanin N, Mraković A, Senna M, Uskoković D. Synthesis of LiFePO4 by mechanical stressing and thermal annealing. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts. 2014;:62-62.
https://hdl.handle.net/21.15107/rcub_dais_582 .

Milović, Miloš, Jugović, Dragana, Mitrić, Miodrag, Cvjetićanin, Nikola, Mraković, Ana, Senna, Mamoru, Uskoković, Dragan, "Synthesis of LiFePO4 by mechanical stressing and thermal annealing" in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts (2014):62-62,
https://hdl.handle.net/21.15107/rcub_dais_582 .

TY  - JOUR
AU  - Blagojević, Vladimir A.
AU  - Obradović, Nina
AU  - Cvjetićanin, Nikola
AU  - Minić, Dragica M.
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/373
AB  - Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65°C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials. [Projekat Ministarstva nauke Republike Srbije, br. 142015]
PB  - Belgrade : International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Influence of dimensionality on phase transition in VO2 nanocrystals
SP  - 305
EP  - 311
VL  - 45
IS  - 3
DO  - 10.2298/SOS1303305B
UR  - https://hdl.handle.net/21.15107/rcub_dais_373
ER  - 

@article{
author = "Blagojević, Vladimir A. and Obradović, Nina and Cvjetićanin, Nikola and Minić, Dragica M.",
year = "2013",
abstract = "Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65°C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials. [Projekat Ministarstva nauke Republike Srbije, br. 142015]",
publisher = "Belgrade : International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Influence of dimensionality on phase transition in VO2 nanocrystals",
pages = "305-311",
volume = "45",
number = "3",
doi = "10.2298/SOS1303305B",
url = "https://hdl.handle.net/21.15107/rcub_dais_373"
}

Blagojević, V. A., Obradović, N., Cvjetićanin, N.,& Minić, D. M.. (2013). Influence of dimensionality on phase transition in VO2 nanocrystals. in Science of Sintering
Belgrade : International Institute for the Science of Sintering., 45(3), 305-311.
https://doi.org/10.2298/SOS1303305B
https://hdl.handle.net/21.15107/rcub_dais_373

Blagojević VA, Obradović N, Cvjetićanin N, Minić DM. Influence of dimensionality on phase transition in VO2 nanocrystals. in Science of Sintering. 2013;45(3):305-311.
doi:10.2298/SOS1303305B
https://hdl.handle.net/21.15107/rcub_dais_373 .

Blagojević, Vladimir A., Obradović, Nina, Cvjetićanin, Nikola, Minić, Dragica M., "Influence of dimensionality on phase transition in VO2 nanocrystals" in Science of Sintering, 45, no. 3 (2013):305-311,
https://doi.org/10.2298/SOS1303305B .,
https://hdl.handle.net/21.15107/rcub_dais_373 .

TY  - JOUR
AU  - Vujković, Milica
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Stojković, Ivana
AU  - Cvjetićanin, Nikola
AU  - Mentus, Slavko
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/384
AB  - The nitrate-(glycine + malonic acid)-assisted gel-combustion process, followed by a heat treatment at 750 °C under reductive atmosphere, was used as a fast and effective way to synthesize vanadium doped olivine incorporated in carbon matrix, of general formula LiFe(1−x)VxPO4/C. The two-phased Rietveld refinement confirmed that vanadium incorporation into olivine structure was complete. The heating under reduction atmosphere caused the formation of iron phosphide to some extent, the concentration was determined by Rietveld analysis. The capacity and rate capability of these composites were tested by both cyclic voltammetry and galvanostatic cycling. Specifically, the average discharging capacities of the composite with x = 0.055, determined in an saturated aqueous LiNO3 solution equilibrated with air, at the rates of 1, 10 and 100 C, amounted to 91, 73 and 35 mAh g−1, respectively, with no perceivable capacity fade.
PB  - Elsevier
T2  - Electrochimica Acta
T1  - The LiFe(1-x)VxPO4/C Composite Synthesized by Gel-Combustion Method, with Improved Rate Capability and Cycle Life in Aerated Aqueous Solutions
SP  - 835
EP  - 842
VL  - 109
DO  - 10.1016/j.electacta.2013.07.219
UR  - https://hdl.handle.net/21.15107/rcub_dais_384
ER  - 

@article{
author = "Vujković, Milica and Jugović, Dragana and Mitrić, Miodrag and Stojković, Ivana and Cvjetićanin, Nikola and Mentus, Slavko",
year = "2013",
abstract = "The nitrate-(glycine + malonic acid)-assisted gel-combustion process, followed by a heat treatment at 750 °C under reductive atmosphere, was used as a fast and effective way to synthesize vanadium doped olivine incorporated in carbon matrix, of general formula LiFe(1−x)VxPO4/C. The two-phased Rietveld refinement confirmed that vanadium incorporation into olivine structure was complete. The heating under reduction atmosphere caused the formation of iron phosphide to some extent, the concentration was determined by Rietveld analysis. The capacity and rate capability of these composites were tested by both cyclic voltammetry and galvanostatic cycling. Specifically, the average discharging capacities of the composite with x = 0.055, determined in an saturated aqueous LiNO3 solution equilibrated with air, at the rates of 1, 10 and 100 C, amounted to 91, 73 and 35 mAh g−1, respectively, with no perceivable capacity fade.",
publisher = "Elsevier",
journal = "Electrochimica Acta",
title = "The LiFe(1-x)VxPO4/C Composite Synthesized by Gel-Combustion Method, with Improved Rate Capability and Cycle Life in Aerated Aqueous Solutions",
pages = "835-842",
volume = "109",
doi = "10.1016/j.electacta.2013.07.219",
url = "https://hdl.handle.net/21.15107/rcub_dais_384"
}

Vujković, M., Jugović, D., Mitrić, M., Stojković, I., Cvjetićanin, N.,& Mentus, S.. (2013). The LiFe(1-x)VxPO4/C Composite Synthesized by Gel-Combustion Method, with Improved Rate Capability and Cycle Life in Aerated Aqueous Solutions. in Electrochimica Acta
Elsevier., 109, 835-842.
https://doi.org/10.1016/j.electacta.2013.07.219
https://hdl.handle.net/21.15107/rcub_dais_384

Vujković M, Jugović D, Mitrić M, Stojković I, Cvjetićanin N, Mentus S. The LiFe(1-x)VxPO4/C Composite Synthesized by Gel-Combustion Method, with Improved Rate Capability and Cycle Life in Aerated Aqueous Solutions. in Electrochimica Acta. 2013;109:835-842.
doi:10.1016/j.electacta.2013.07.219
https://hdl.handle.net/21.15107/rcub_dais_384 .

Vujković, Milica, Jugović, Dragana, Mitrić, Miodrag, Stojković, Ivana, Cvjetićanin, Nikola, Mentus, Slavko, "The LiFe(1-x)VxPO4/C Composite Synthesized by Gel-Combustion Method, with Improved Rate Capability and Cycle Life in Aerated Aqueous Solutions" in Electrochimica Acta, 109 (2013):835-842,
https://doi.org/10.1016/j.electacta.2013.07.219 .,
https://hdl.handle.net/21.15107/rcub_dais_384 .

TY  - CONF
AU  - Kuzmanović, Maja
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Jokić, Bojan
AU  - Cvjetićanin, Nikola
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/395
AB  - One of the most perspective cathode materials for the application in the Li-ion batteries is LiFePO4. It has high theoretical specific capacity, good cycle life and technically suitable flat voltage of 3.45 V versus Li. However, its main disadvantages are low electronic and ionic conductivities which can be overcome by particle size minimization and/or carbon coating. Here is presented the freeze-drying method for the preparation of carbon coated LiFePO4 particles. It involves freezing of a precursor solution, vacuum drying and final calcination of as-dried powder under slightly reductive atmosphere. The main advantage of this preparation process is mixing at the atomic level which provides more homogeneous precursor. Water solutions containing Li+,PO4 3- and Fe2+ ions with the addition of various organic compounds as a carbon source were used as the precursor solutions. The as-prepared powders were fully characterized by means of X-ray powder diffraction, scanning electron microscopy, particle size analyzer and galvanostatic cycling.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Carbon coated LiFePO4 cathode material obtained by freeze-drying method
SP  - 76
EP  - 76
UR  - https://hdl.handle.net/21.15107/rcub_dais_395
ER  - 

@conference{
author = "Kuzmanović, Maja and Jugović, Dragana and Mitrić, Miodrag and Jokić, Bojan and Cvjetićanin, Nikola and Uskoković, Dragan",
year = "2013",
abstract = "One of the most perspective cathode materials for the application in the Li-ion batteries is LiFePO4. It has high theoretical specific capacity, good cycle life and technically suitable flat voltage of 3.45 V versus Li. However, its main disadvantages are low electronic and ionic conductivities which can be overcome by particle size minimization and/or carbon coating. Here is presented the freeze-drying method for the preparation of carbon coated LiFePO4 particles. It involves freezing of a precursor solution, vacuum drying and final calcination of as-dried powder under slightly reductive atmosphere. The main advantage of this preparation process is mixing at the atomic level which provides more homogeneous precursor. Water solutions containing Li+,PO4 3- and Fe2+ ions with the addition of various organic compounds as a carbon source were used as the precursor solutions. The as-prepared powders were fully characterized by means of X-ray powder diffraction, scanning electron microscopy, particle size analyzer and galvanostatic cycling.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Carbon coated LiFePO4 cathode material obtained by freeze-drying method",
pages = "76-76",
url = "https://hdl.handle.net/21.15107/rcub_dais_395"
}

Kuzmanović, M., Jugović, D., Mitrić, M., Jokić, B., Cvjetićanin, N.,& Uskoković, D.. (2013). Carbon coated LiFePO4 cathode material obtained by freeze-drying method. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 76-76.
https://hdl.handle.net/21.15107/rcub_dais_395

Kuzmanović M, Jugović D, Mitrić M, Jokić B, Cvjetićanin N, Uskoković D. Carbon coated LiFePO4 cathode material obtained by freeze-drying method. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:76-76.
https://hdl.handle.net/21.15107/rcub_dais_395 .

Kuzmanović, Maja, Jugović, Dragana, Mitrić, Miodrag, Jokić, Bojan, Cvjetićanin, Nikola, Uskoković, Dragan, "Carbon coated LiFePO4 cathode material obtained by freeze-drying method" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):76-76,
https://hdl.handle.net/21.15107/rcub_dais_395 .

TY  - CONF
AU  - Kuzmanović, Maja
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Jokić, Bojan
AU  - Cvjetićanin, Nikola
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/445
AB  - Based on its high capacity, stability, low toxicity and low cost of raw materials, phosphoolivine LiFePO4 became a material of great interest for Li-ion battery application. Synthesis of LiFePO4/C cathode material was performed by freeze-drying method using different organic acids as carbon source. Freeze-drying process consists of freezing of a precursor solution, elimination of solvent by sublimation (vacuum drying) and final calcinations of as-dried powder under slightly reductive atmosphere. The main advantage of this synthesis method is possibility of introducing a carbon source and mixing of reactants at atomic level which provides homogeneity of precursor solution. Synthesized materials were characterized by X-ray powder diffraction, scanning electron microscopy, particle size analyzer and galvanostatic charging/discharging.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Engineering December 11-13, 2013, Belgrade, Serbia
T1  - Freeze-drying method for LiFePO4/C composite processing
SP  - 33
EP  - 33
UR  - https://hdl.handle.net/21.15107/rcub_dais_445
ER  - 

@conference{
author = "Kuzmanović, Maja and Jugović, Dragana and Mitrić, Miodrag and Jokić, Bojan and Cvjetićanin, Nikola and Uskoković, Dragan",
year = "2013",
abstract = "Based on its high capacity, stability, low toxicity and low cost of raw materials, phosphoolivine LiFePO4 became a material of great interest for Li-ion battery application. Synthesis of LiFePO4/C cathode material was performed by freeze-drying method using different organic acids as carbon source. Freeze-drying process consists of freezing of a precursor solution, elimination of solvent by sublimation (vacuum drying) and final calcinations of as-dried powder under slightly reductive atmosphere. The main advantage of this synthesis method is possibility of introducing a carbon source and mixing of reactants at atomic level which provides homogeneity of precursor solution. Synthesized materials were characterized by X-ray powder diffraction, scanning electron microscopy, particle size analyzer and galvanostatic charging/discharging.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Engineering December 11-13, 2013, Belgrade, Serbia",
title = "Freeze-drying method for LiFePO4/C composite processing",
pages = "33-33",
url = "https://hdl.handle.net/21.15107/rcub_dais_445"
}

Kuzmanović, M., Jugović, D., Mitrić, M., Jokić, B., Cvjetićanin, N.,& Uskoković, D.. (2013). Freeze-drying method for LiFePO4/C composite processing. in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Engineering December 11-13, 2013, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 33-33.
https://hdl.handle.net/21.15107/rcub_dais_445

Kuzmanović M, Jugović D, Mitrić M, Jokić B, Cvjetićanin N, Uskoković D. Freeze-drying method for LiFePO4/C composite processing. in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Engineering December 11-13, 2013, Belgrade, Serbia. 2013;:33-33.
https://hdl.handle.net/21.15107/rcub_dais_445 .

Kuzmanović, Maja, Jugović, Dragana, Mitrić, Miodrag, Jokić, Bojan, Cvjetićanin, Nikola, Uskoković, Dragan, "Freeze-drying method for LiFePO4/C composite processing" in Program and the Book of Abstracts / Twelfth Young Researchers' Conference Materials Sciences and Engineering December 11-13, 2013, Belgrade, Serbia (2013):33-33,
https://hdl.handle.net/21.15107/rcub_dais_445 .

TY  - CONF
AU  - Milović, Miloš
AU  - Vukajlović, Filip R.
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Jokić, Bojan
AU  - Cvjetićanin, Nikola
AU  - Milošević, A. S.
AU  - Popović, Zoran S.
AU  - Uskoković, Dragan
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/399
AB  - Fluorine-doped, olivine-structured LiFePO4 suitable for cathode material in rechargeable lithium batteries was prepared by aqueous precipitation followed by high temperature treatment at 700°C under slightly reductive atmosphere (Ar+5%H2). The starting materials were equimolar quantities of (NH4)2HPO4, FeSO4·7H2O and LiF. LiF served as both lithium and fluorine source. Besides the lattice parameters and the primitive cell volume reductions, compared to the undoped sample synthesized under the same conditions using LiNO3 as lithium source, the Rietveld refinement also shows that fluorine ions preferably occupy specific oxygen sites. Particularly, the best refinement is accomplished when fluorine ions occupy O(2) sites exclusively. By means of up-to-date electronic structure and total energy calculations this experimental finding is theoretically confirmed. Such fluorine doping also produces closing of the gap in the electronic structure and consequently better conductivity properties of the doped compound. In addition, the morphological and electrochemical performances of the synthesized powders are fully characterized.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
T1  - Synthesis of f-doped LiFePO4 via precipitation method
SP  - 75
EP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_dais_399
ER  - 

@conference{
author = "Milović, Miloš and Vukajlović, Filip R. and Jugović, Dragana and Mitrić, Miodrag and Jokić, Bojan and Cvjetićanin, Nikola and Milošević, A. S. and Popović, Zoran S. and Uskoković, Dragan",
year = "2013",
abstract = "Fluorine-doped, olivine-structured LiFePO4 suitable for cathode material in rechargeable lithium batteries was prepared by aqueous precipitation followed by high temperature treatment at 700°C under slightly reductive atmosphere (Ar+5%H2). The starting materials were equimolar quantities of (NH4)2HPO4, FeSO4·7H2O and LiF. LiF served as both lithium and fluorine source. Besides the lattice parameters and the primitive cell volume reductions, compared to the undoped sample synthesized under the same conditions using LiNO3 as lithium source, the Rietveld refinement also shows that fluorine ions preferably occupy specific oxygen sites. Particularly, the best refinement is accomplished when fluorine ions occupy O(2) sites exclusively. By means of up-to-date electronic structure and total energy calculations this experimental finding is theoretically confirmed. Such fluorine doping also produces closing of the gap in the electronic structure and consequently better conductivity properties of the doped compound. In addition, the morphological and electrochemical performances of the synthesized powders are fully characterized.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts",
title = "Synthesis of f-doped LiFePO4 via precipitation method",
pages = "75-75",
url = "https://hdl.handle.net/21.15107/rcub_dais_399"
}

Milović, M., Vukajlović, F. R., Jugović, D., Mitrić, M., Jokić, B., Cvjetićanin, N., Milošević, A. S., Popović, Z. S.,& Uskoković, D.. (2013). Synthesis of f-doped LiFePO4 via precipitation method. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 75-75.
https://hdl.handle.net/21.15107/rcub_dais_399

Milović M, Vukajlović FR, Jugović D, Mitrić M, Jokić B, Cvjetićanin N, Milošević AS, Popović ZS, Uskoković D. Synthesis of f-doped LiFePO4 via precipitation method. in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts. 2013;:75-75.
https://hdl.handle.net/21.15107/rcub_dais_399 .

Milović, Miloš, Vukajlović, Filip R., Jugović, Dragana, Mitrić, Miodrag, Jokić, Bojan, Cvjetićanin, Nikola, Milošević, A. S., Popović, Zoran S., Uskoković, Dragan, "Synthesis of f-doped LiFePO4 via precipitation method" in The Fifteenth Annual Conference YUCOMAT 2013: Programme and the Book of Abstracts (2013):75-75,
https://hdl.handle.net/21.15107/rcub_dais_399 .