The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution
Само за регистроване кориснике
2019
Аутори
Georgijević, RadovanVujković, Milica
Gutić, Sanjin
Aliefendić, Meho
Jugović, Dragana
Mitrić, Miodrag
Đokić, Veljko
Mentus, Slavko
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. ...The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1.
Кључне речи:
aqueous electrolytes / kinetics of lithium redox behaviour / olivine LiFePOИзвор:
Journal of Alloys and Compounds, 2019, 776, 475-485Издавач:
- Elsevier
Финансирање / пројекти:
- Молекуларно дизајнирање наночестица контролисаних морфолошких и физичко-хемијских карактеристика и функционалних материјала на њиховој основи (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45004)
- Магнетни и радионуклидима обележени наноструктурни материјали за примене у медицини (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45015)
- Синтеза, развој технологија добијања и примена наноструктурних мултифункционалних материјала дефинисаних својстава (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45019)
- Bilateral project between Serbia and Slovenia "Developments of novel materials for alkaline-ion batteries"
- Serbian Academy of Sciences and Arts, Project F-190
Напомена:
- Peer-reviewed manuscript: https://hdl.handle.net/21.15107/rcub_dais_4569
- Supporting information: https://hdl.handle.net/21.15107/rcub_dais_5975
Повезане информације:
- Друга верзија
https://hdl.handle.net/21.15107/rcub_dais_4569 - Повезани садржај
https://hdl.handle.net/21.15107/rcub_dais_5975
DOI: 10.1016/j.jallcom.2018.10.246
ISSN: 0925-8388
WoS: 000453826200054
Scopus: 2-s2.0-85055737904
URI
http://www.sciencedirect.com/science/article/pii/S0925838818339185https://dais.sanu.ac.rs/123456789/4568
Колекције
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Georgijević, Radovan AU - Vujković, Milica AU - Gutić, Sanjin AU - Aliefendić, Meho AU - Jugović, Dragana AU - Mitrić, Miodrag AU - Đokić, Veljko AU - Mentus, Slavko PY - 2019 UR - http://www.sciencedirect.com/science/article/pii/S0925838818339185 UR - https://dais.sanu.ac.rs/123456789/4568 AB - To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1. PB - Elsevier T2 - Journal of Alloys and Compounds T1 - The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution SP - 475 EP - 485 VL - 776 DO - 10.1016/j.jallcom.2018.10.246 UR - https://hdl.handle.net/21.15107/rcub_dais_4568 ER -
@article{ author = "Georgijević, Radovan and Vujković, Milica and Gutić, Sanjin and Aliefendić, Meho and Jugović, Dragana and Mitrić, Miodrag and Đokić, Veljko and Mentus, Slavko", year = "2019", abstract = "To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1.", publisher = "Elsevier", journal = "Journal of Alloys and Compounds", title = "The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution", pages = "475-485", volume = "776", doi = "10.1016/j.jallcom.2018.10.246", url = "https://hdl.handle.net/21.15107/rcub_dais_4568" }
Georgijević, R., Vujković, M., Gutić, S., Aliefendić, M., Jugović, D., Mitrić, M., Đokić, V.,& Mentus, S.. (2019). The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution. in Journal of Alloys and Compounds Elsevier., 776, 475-485. https://doi.org/10.1016/j.jallcom.2018.10.246 https://hdl.handle.net/21.15107/rcub_dais_4568
Georgijević R, Vujković M, Gutić S, Aliefendić M, Jugović D, Mitrić M, Đokić V, Mentus S. The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution. in Journal of Alloys and Compounds. 2019;776:475-485. doi:10.1016/j.jallcom.2018.10.246 https://hdl.handle.net/21.15107/rcub_dais_4568 .
Georgijević, Radovan, Vujković, Milica, Gutić, Sanjin, Aliefendić, Meho, Jugović, Dragana, Mitrić, Miodrag, Đokić, Veljko, Mentus, Slavko, "The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution" in Journal of Alloys and Compounds, 776 (2019):475-485, https://doi.org/10.1016/j.jallcom.2018.10.246 ., https://hdl.handle.net/21.15107/rcub_dais_4568 .