TY  - JOUR
AU  - Veselinović, Ljiljana
AU  - Mitrić, Miodrag
AU  - Avdeev, Maxim
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/2328
AB  - Neutron powder diffraction (NPD) was employed to further investigate the BaTi1−xSnxO3 (BTS) system previously studied by X-ray diffraction. The room-temperature phase compositions and crystal structures of BTS samples with x = 0, 0.025, 0.05, 0.07, 0.10, 0.12, 0.15 and 0.20 were refined by the Rietveld method using NPD data. It is well known that barium titanate powder (x = 0) crystallizes in the tetragonal P4mm space group. The crystal structures of the samples with 0.025 ≤ x ≤ 0.07 were refined as mixtures of P4mm and Amm2 phases; those with x = 0.1 and 0.12 show the coexistence of rhombohedral R3m and cubic phases, while the samples with x = 0.15 and 0.20 crystallize in a single cubic [Pm3m] phase. Temperature-dependent NPD was used to characterize the BaTi0.95Sn0.05O3 sample at 273, 333 and 373 K, and it was found to form single-phase Amm2, P4mm and [Pm3m] structures at these respective temperatures. The NPD results are in agreement with data obtained by differential scanning calorimetry and dielectric permittivity measurements, which show a paraelectric–ferroelectric transition (associated with structural transition) from [Pm3m] to P4mm at about 353 K followed by a P4mm to Amm2 phase transition at about 303 K.
PB  - International Union of Crystallography
T2  - Journal of Applied Crystallography
T1  - New insights into BaTi1–xSnxO3 (0 ≤ x ≤ 0.20) phase diagram from neutron diffraction data
SP  - 1726
EP  - 1733
VL  - 49
DO  - 10.1107/S1600576716013157
UR  - https://hdl.handle.net/21.15107/rcub_dais_2328
ER  - 

@article{
author = "Veselinović, Ljiljana and Mitrić, Miodrag and Avdeev, Maxim and Marković, Smilja and Uskoković, Dragan",
year = "2016",
abstract = "Neutron powder diffraction (NPD) was employed to further investigate the BaTi1−xSnxO3 (BTS) system previously studied by X-ray diffraction. The room-temperature phase compositions and crystal structures of BTS samples with x = 0, 0.025, 0.05, 0.07, 0.10, 0.12, 0.15 and 0.20 were refined by the Rietveld method using NPD data. It is well known that barium titanate powder (x = 0) crystallizes in the tetragonal P4mm space group. The crystal structures of the samples with 0.025 ≤ x ≤ 0.07 were refined as mixtures of P4mm and Amm2 phases; those with x = 0.1 and 0.12 show the coexistence of rhombohedral R3m and cubic phases, while the samples with x = 0.15 and 0.20 crystallize in a single cubic [Pm3m] phase. Temperature-dependent NPD was used to characterize the BaTi0.95Sn0.05O3 sample at 273, 333 and 373 K, and it was found to form single-phase Amm2, P4mm and [Pm3m] structures at these respective temperatures. The NPD results are in agreement with data obtained by differential scanning calorimetry and dielectric permittivity measurements, which show a paraelectric–ferroelectric transition (associated with structural transition) from [Pm3m] to P4mm at about 353 K followed by a P4mm to Amm2 phase transition at about 303 K.",
publisher = "International Union of Crystallography",
journal = "Journal of Applied Crystallography",
title = "New insights into BaTi1–xSnxO3 (0 ≤ x ≤ 0.20) phase diagram from neutron diffraction data",
pages = "1726-1733",
volume = "49",
doi = "10.1107/S1600576716013157",
url = "https://hdl.handle.net/21.15107/rcub_dais_2328"
}

Veselinović, L., Mitrić, M., Avdeev, M., Marković, S.,& Uskoković, D.. (2016). New insights into BaTi1–xSnxO3 (0 ≤ x ≤ 0.20) phase diagram from neutron diffraction data. in Journal of Applied Crystallography
International Union of Crystallography., 49, 1726-1733.
https://doi.org/10.1107/S1600576716013157
https://hdl.handle.net/21.15107/rcub_dais_2328

Veselinović L, Mitrić M, Avdeev M, Marković S, Uskoković D. New insights into BaTi1–xSnxO3 (0 ≤ x ≤ 0.20) phase diagram from neutron diffraction data. in Journal of Applied Crystallography. 2016;49:1726-1733.
doi:10.1107/S1600576716013157
https://hdl.handle.net/21.15107/rcub_dais_2328 .

Veselinović, Ljiljana, Mitrić, Miodrag, Avdeev, Maxim, Marković, Smilja, Uskoković, Dragan, "New insights into BaTi1–xSnxO3 (0 ≤ x ≤ 0.20) phase diagram from neutron diffraction data" in Journal of Applied Crystallography, 49 (2016):1726-1733,
https://doi.org/10.1107/S1600576716013157 .,
https://hdl.handle.net/21.15107/rcub_dais_2328 .

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  - JOUR
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Ivanovski, Valentin N.
AU  - Avdeev, Maxim
AU  - Dominko, Robert
AU  - Jokić, Bojan
AU  - Uskoković, Dragan
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/755
AB  - A composite powder Li2FeSiO4/C is synthesized through a solid state reaction at 750 °C. The Rietveld crystal structure refinement is done in the monoclinic P21/n space group. It is found that the crystal structure is prone to “antisite” defect where small part of iron ion occupies exclusively Li(2) crystallographic position, of two different lithium tetrahedral positions (Li(1) and Li(2)). This finding is also confirmed by Mössbauer spectroscopy study: the sextet evidenced in the Mössbauer spectrum is assigned to the iron ions positioned at the Li(2) sites. A bond-valence energy landscape calculation is used to predict the conduction pathways of lithium ions. The calculations suggest that Li conductivity is two-dimensional in the (101) plane. Upon galvanostatic cyclings the structure starts to rearrange to inverse βII polymorph.
T2  - Journal of Power Sources
T1  - Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy
SP  - 75
EP  - 80
VL  - 265
DO  - 10.1016/j.jpowsour.2014.04.121
UR  - https://hdl.handle.net/21.15107/rcub_dais_755
ER  - 

@article{
author = "Jugović, Dragana and Milović, Miloš and Ivanovski, Valentin N. and Avdeev, Maxim and Dominko, Robert and Jokić, Bojan and Uskoković, Dragan",
year = "2014",
abstract = "A composite powder Li2FeSiO4/C is synthesized through a solid state reaction at 750 °C. The Rietveld crystal structure refinement is done in the monoclinic P21/n space group. It is found that the crystal structure is prone to “antisite” defect where small part of iron ion occupies exclusively Li(2) crystallographic position, of two different lithium tetrahedral positions (Li(1) and Li(2)). This finding is also confirmed by Mössbauer spectroscopy study: the sextet evidenced in the Mössbauer spectrum is assigned to the iron ions positioned at the Li(2) sites. A bond-valence energy landscape calculation is used to predict the conduction pathways of lithium ions. The calculations suggest that Li conductivity is two-dimensional in the (101) plane. Upon galvanostatic cyclings the structure starts to rearrange to inverse βII polymorph.",
journal = "Journal of Power Sources",
title = "Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy",
pages = "75-80",
volume = "265",
doi = "10.1016/j.jpowsour.2014.04.121",
url = "https://hdl.handle.net/21.15107/rcub_dais_755"
}

Jugović, D., Milović, M., Ivanovski, V. N., Avdeev, M., Dominko, R., Jokić, B.,& Uskoković, D.. (2014). Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy. in Journal of Power Sources, 265, 75-80.
https://doi.org/10.1016/j.jpowsour.2014.04.121
https://hdl.handle.net/21.15107/rcub_dais_755

Jugović D, Milović M, Ivanovski VN, Avdeev M, Dominko R, Jokić B, Uskoković D. Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy. in Journal of Power Sources. 2014;265:75-80.
doi:10.1016/j.jpowsour.2014.04.121
https://hdl.handle.net/21.15107/rcub_dais_755 .

Jugović, Dragana, Milović, Miloš, Ivanovski, Valentin N., Avdeev, Maxim, Dominko, Robert, Jokić, Bojan, Uskoković, Dragan, "Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy" in Journal of Power Sources, 265 (2014):75-80,
https://doi.org/10.1016/j.jpowsour.2014.04.121 .,
https://hdl.handle.net/21.15107/rcub_dais_755 .

TY  - JOUR
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Ivanovski, Valentin N.
AU  - Avdeev, Maxim
AU  - Dominko, Robert
AU  - Jokić, Bojan
AU  - Uskoković, Dragan
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/542
AB  - A composite powder Li2FeSiO4/C is synthesized through a solid state reaction at 750 °C. The Rietveld crystal structure refinement is done in the monoclinic P21/n space group. It is found that the crystal structure is prone to “antisite” defect where small part of iron ion occupies exclusively Li(2) crystallographic position, of two different lithium tetrahedral positions (Li(1) and Li(2)). This finding is also confirmed by Mössbauer spectroscopy study: the sextet evidenced in the Mössbauer spectrum is assigned to the iron ions positioned at the Li(2) sites. A bond-valence energy landscape calculation is used to predict the conduction pathways of lithium ions. The calculations suggest that Li conductivity is two-dimensional in the (101) plane. Upon galvanostatic cyclings the structure starts to rearrange to inverse βII polymorph.
PB  - Elsevier
T2  - Journal of Power Sources
T1  - Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy
SP  - 75
EP  - 80
VL  - 265
DO  - 10.1016/j.jpowsour.2014.04.121
UR  - https://hdl.handle.net/21.15107/rcub_dais_542
ER  - 

@article{
author = "Jugović, Dragana and Milović, Miloš and Ivanovski, Valentin N. and Avdeev, Maxim and Dominko, Robert and Jokić, Bojan and Uskoković, Dragan",
year = "2014",
abstract = "A composite powder Li2FeSiO4/C is synthesized through a solid state reaction at 750 °C. The Rietveld crystal structure refinement is done in the monoclinic P21/n space group. It is found that the crystal structure is prone to “antisite” defect where small part of iron ion occupies exclusively Li(2) crystallographic position, of two different lithium tetrahedral positions (Li(1) and Li(2)). This finding is also confirmed by Mössbauer spectroscopy study: the sextet evidenced in the Mössbauer spectrum is assigned to the iron ions positioned at the Li(2) sites. A bond-valence energy landscape calculation is used to predict the conduction pathways of lithium ions. The calculations suggest that Li conductivity is two-dimensional in the (101) plane. Upon galvanostatic cyclings the structure starts to rearrange to inverse βII polymorph.",
publisher = "Elsevier",
journal = "Journal of Power Sources",
title = "Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy",
pages = "75-80",
volume = "265",
doi = "10.1016/j.jpowsour.2014.04.121",
url = "https://hdl.handle.net/21.15107/rcub_dais_542"
}

Jugović, D., Milović, M., Ivanovski, V. N., Avdeev, M., Dominko, R., Jokić, B.,& Uskoković, D.. (2014). Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy. in Journal of Power Sources
Elsevier., 265, 75-80.
https://doi.org/10.1016/j.jpowsour.2014.04.121
https://hdl.handle.net/21.15107/rcub_dais_542

Jugović D, Milović M, Ivanovski VN, Avdeev M, Dominko R, Jokić B, Uskoković D. Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy. in Journal of Power Sources. 2014;265:75-80.
doi:10.1016/j.jpowsour.2014.04.121
https://hdl.handle.net/21.15107/rcub_dais_542 .

Jugović, Dragana, Milović, Miloš, Ivanovski, Valentin N., Avdeev, Maxim, Dominko, Robert, Jokić, Bojan, Uskoković, Dragan, "Structural study of monoclinic Li2FeSiO4 by X-ray diffraction and Mössbauer spectroscopy" in Journal of Power Sources, 265 (2014):75-80,
https://doi.org/10.1016/j.jpowsour.2014.04.121 .,
https://hdl.handle.net/21.15107/rcub_dais_542 .

TY  - CONF
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Mitrić, Miodrag
AU  - Ivanovski, Valentin N.
AU  - Avdeev, Maxim
AU  - Jokić, Bojan
AU  - Dominko, Robert
AU  - Uskoković, Dragan
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/590
AB  - Monoclinic Li2FeSiO4 that crystallizes in P21/n space group was investigated as a potential cathode material for lithium-ion batteries. A combined X-ray diffraction and Mössbauer spectroscopy study was used for the structural investigation. It was found that the crystal structure is prone to an “antisite” defect, the one in which the Fe ion and the Li ion exchange places. This finding was also confirmed by the Mössbauer spectroscopy. In order to obtain composites of Li2FeSiO4 and carbon, several synthesis techniques that use different carbon sources were involved. Electrochemical performances were investigated through galvanostatic charge/discharge tests. Discharge curve profile did not reflect a two-phase intercalation reaction (no obvious voltage plateau) due to the low conductivity at room temperature.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
T1  - Li2FeSiO4 cathode material: the structure and electrochemical performances
SP  - 6
EP  - 6
UR  - https://hdl.handle.net/21.15107/rcub_dais_590
ER  - 

@conference{
author = "Jugović, Dragana and Milović, Miloš and Mitrić, Miodrag and Ivanovski, Valentin N. and Avdeev, Maxim and Jokić, Bojan and Dominko, Robert and Uskoković, Dragan",
year = "2014",
abstract = "Monoclinic Li2FeSiO4 that crystallizes in P21/n space group was investigated as a potential cathode material for lithium-ion batteries. A combined X-ray diffraction and Mössbauer spectroscopy study was used for the structural investigation. It was found that the crystal structure is prone to an “antisite” defect, the one in which the Fe ion and the Li ion exchange places. This finding was also confirmed by the Mössbauer spectroscopy. In order to obtain composites of Li2FeSiO4 and carbon, several synthesis techniques that use different carbon sources were involved. Electrochemical performances were investigated through galvanostatic charge/discharge tests. Discharge curve profile did not reflect a two-phase intercalation reaction (no obvious voltage plateau) due to the low conductivity at room temperature.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts",
title = "Li2FeSiO4 cathode material: the structure and electrochemical performances",
pages = "6-6",
url = "https://hdl.handle.net/21.15107/rcub_dais_590"
}

Jugović, D., Milović, M., Mitrić, M., Ivanovski, V. N., Avdeev, M., Jokić, B., Dominko, R.,& Uskoković, D.. (2014). Li2FeSiO4 cathode material: the structure and electrochemical performances. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 6-6.
https://hdl.handle.net/21.15107/rcub_dais_590

Jugović D, Milović M, Mitrić M, Ivanovski VN, Avdeev M, Jokić B, Dominko R, Uskoković D. Li2FeSiO4 cathode material: the structure and electrochemical performances. in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts. 2014;:6-6.
https://hdl.handle.net/21.15107/rcub_dais_590 .

Jugović, Dragana, Milović, Miloš, Mitrić, Miodrag, Ivanovski, Valentin N., Avdeev, Maxim, Jokić, Bojan, Dominko, Robert, Uskoković, Dragan, "Li2FeSiO4 cathode material: the structure and electrochemical performances" in The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts (2014):6-6,
https://hdl.handle.net/21.15107/rcub_dais_590 .