The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder

2016
Authors
Jugović, Dragana
Mitrić, Miodrag

Milović, Miloš

Cvjetićanin, Nikola

Jokić, Bojan M.

Umićević, Ana

Uskoković, Dragan

Contributors
Uskoković, Dragan
Radmilović, Velimir R.
Conference object
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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.
Keywords:
LiFePO4 / fluorine doping / magnetic propertiesSource:
YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi, 2016, 35-35Publisher:
- Belgrade : Materials Research Society of Serbia
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VinčaTY - CONF AU - Jugović, Dragana AU - Mitrić, Miodrag AU - Milović, Miloš AU - Cvjetićanin, Nikola AU - Jokić, Bojan M. AU - Umićević, Ana AU - Uskoković, Dragan PY - 2016 UR - http://dais.sanu.ac.rs/123456789/898 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7555 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 - YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi 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_vinar_7555 ER -
@conference{ author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Cvjetićanin, Nikola and Jokić, Bojan M. 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 = "YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi", 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_vinar_7555" }
Jugović, D., Mitrić, M., Milović, M., Cvjetićanin, N., Jokić, B. M., Umićević, A.,& Uskoković, D.. (2016). The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi Belgrade : Materials Research Society of Serbia., 35-35. https://hdl.handle.net/21.15107/rcub_vinar_7555
Jugović D, Mitrić M, Milović M, Cvjetićanin N, Jokić BM, Umićević A, Uskoković D. The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi. 2016;:35-35. https://hdl.handle.net/21.15107/rcub_vinar_7555 .
Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Cvjetićanin, Nikola, Jokić, Bojan M., Umićević, Ana, Uskoković, Dragan, "The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder" in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi (2016):35-35, https://hdl.handle.net/21.15107/rcub_vinar_7555 .