2011•Advanced materials researchRequires access

Influence of Carbon Sources on the Electrochemical Performance of LiFePO4/C Composite Cathode Material

Xiu Juan Qin, Guang Jie Shao, Hong Lian Wu

Abstract

LiFePO4/C cathode material with different carbon sources was synthesized by using a two-step carbothermal reduction method. The structure and electrochemical properties of the samples were characterized by XRD, SEM and galvano-static charge-discharge method. The effect of different carbon sources on the structure, morphology and its electrochemical properties of the LiFePO4/C composite materials were investigated. The results showed that the properties of the samples depended on carbon sources, significantly. The sample synthesized by citric acid as carbon source had the best electrochemical performance. The reason of performance difference of the LiFePO4/C composite materials caused by carbon source was discussed.

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Key concepts: Electrochemistry, Materials science, Carbothermic reaction, Composite number, Carbon fibers, Citric acid, Cathode, Chemical engineering