Improved electrochemical performance of LiFePO4/C for lithium-ion batteries with two kinds of carbon sources

摘要：

In order to improve the electrochemical performance of LiFePO4, LiFePCVC composite was synthesized via solid-state reaction with two kinds of carbon sources: carbon sol-gel and glucose. The structure and electrochemical properties of the LiFePO4/C composite were characterized by XRD, SEM, TEM, cyclic voltammetry(CV) and galvanostatic charge-discharge. The results indicate that carbon adding has no effect on the phase of LiFePO4. The LiFePCVC shows higher discharge capacity than pure LiFePO4 and an excellent rate property, as carbon network improves the electron conductivity of LiFePO4 significantly. It presents a discharge specific capacity of 162 mAh/g at both 0.1 C and 0.2 C rates and 157 mAh/g at 1 C rate.

关键词： LiFePO4/C cathode material Lithium-ion batteries Carbon sol-gel Glucose

作者: Chunyan Lai Qunjie Xu Honghua Ge Guoding Zhou Jingying Xie

作者单位: School of Thermal Power and Environment engineering, Shanghai University of Electric Power, Shanghai Shanghai Institute of Space Power Source, Shanghai 200233, China

会议类型: 国际会议

会议名称: The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)

会议地点: 上海

会议语种:英文

页码: 1736-1739

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）