6533b85afe1ef96bd12b8a99

RESEARCH PRODUCT

Physical and electrochemical properties of LiFePO4/C thin films deposited by direct current and radiofrequency magnetron sputtering

G. BajarsJanis SmitsGints KucinskisJanis Kleperis

subject

Materials scienceDirect currentAnalytical chemistrychemistry.chemical_elementGeneral ChemistrySputter depositionCondensed Matter PhysicsMicrostructureElectrochemistryDielectric spectroscopychemistryGeneral Materials ScienceLithiumThin filmCyclic voltammetry

description

Abstract In this study, LiFePO 4 /C thin films with various contents of carbon were prepared by direct current (DC), radiofrequency (RF) and combined (DC/RF) magnetron sputtering methods. Influences of the composition, morphology and microstructure on the electrochemical properties of LiFePO 4 /C thin films are investigated by studying charge–discharge curves, cyclic voltammetry and electrochemical impedance spectroscopy. Cyclic voltammogram of the LiFePO 4 /C thin film showed the typical redox reaction peaks characterizing the electrochemical lithium insertion/extraction reactions in LiFePO 4 . Obtained LiFePO 4 /C thin films have relatively high charge capacities (127 mAh g − 1 ). It was found that optimal magnetron sputtering conditions use a combined CD/RF process to obtain LiFePO 4 /C thin films with the best electrochemical performance.

yearjournalcountryeditionlanguage
2011-04-01Solid State Ionics
https://doi.org/10.1016/j.ssi.2010.10.022