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

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

来源：Solid State Ionics, 2008, 179(27-32): 1736-1739.

DOI：10.1016/j.ssi.2008.03.042

• LiFePO4/C cathode material
• lithium-ion batteries
• carbon sol-gel
• glucose

In order to improve the electrochemical performance of LiFePO4, LiFePO4/C 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 LiFePO4/C shows higher discharge capacity than pure LiFePO4 and an excellent rate property, as carbon network improves the electron conductivity of LiFCPO4 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.

• 出版日期2008-9-30
• 单位上海空间电源研究所; 上海电力大学