Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.electacta.2012.08.073
DC FieldValue
dc.titleSynthesis, impedance and electrochemical studies of lithium iron fluorophosphate, LiFePO4F cathode
dc.contributor.authorPrabu, M.
dc.contributor.authorReddy, M.V.
dc.contributor.authorSelvasekarapandian, S.
dc.contributor.authorRao, G.V.S.
dc.contributor.authorChowdari, B.V.R.
dc.date.accessioned2014-10-16T09:44:14Z
dc.date.available2014-10-16T09:44:14Z
dc.date.issued2012-12-15
dc.identifier.citationPrabu, M., Reddy, M.V., Selvasekarapandian, S., Rao, G.V.S., Chowdari, B.V.R. (2012-12-15). Synthesis, impedance and electrochemical studies of lithium iron fluorophosphate, LiFePO4F cathode. Electrochimica Acta 85 : 572-578. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2012.08.073
dc.identifier.issn00134686
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/98204
dc.description.abstractTavorite-structured LiFePO4F is synthesized by solid-state reaction and characterized by Rietveld refined X-ray diffraction, scanning electron microscopy, BET surface area, IR and Raman spectroscopy techniques. The ionic conductivity (σ ionic) of LiFePO4F estimated using impedance analysis at 27 °C and at 50 °C are 0.6(±0.1) × 10-7 and 5.4(±0.1) × 10-7 S cm-1, respectively, with an energy of activation (Ea) = 0.75 eV. Its electrochemical behavior were examined by galvanostatic charge-discharge cycling up to 100 cycles, cyclic voltammetry (CV) and electrochemical impedance spectroscopy using Li-metal as the counter and reference electrode, at 0.1C rate in the voltage range, 1.5-4 V. LiFePO4F delivers an initial discharge capacity of 115(±3) mAh g-1 which increases to 119(±3) mAh g-1 at the 20th cycle. The capacity degrades slowly thereafter over 100 cycles, with a capacity loss of 19%. CV data show a clear indication of the Fe3+/2+ redox couple at 3.3-2.6 V that involves a two-phase reaction. Electrochemical impedance spectra measured at various voltages at selected cycles were fitted to an equivalent circuit and the variation of impedance parameters interpreted. © 2012 Elsevier Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.electacta.2012.08.073
dc.sourceScopus
dc.subjectCathode
dc.subjectImpedance spectroscopy
dc.subjectLiFePO4F
dc.subjectTavorite-structure
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1016/j.electacta.2012.08.073
dc.description.sourcetitleElectrochimica Acta
dc.description.volume85
dc.description.page572-578
dc.description.codenELCAA
dc.identifier.isiut000314376000077
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

43
checked on Feb 6, 2023

WEB OF SCIENCETM
Citations

38
checked on Feb 6, 2023

Page view(s)

167
checked on Feb 2, 2023

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.