Electrochemical synthesis of LiFePO_4/C using different solvent and its performance

The LiFePO4 /C composite cathode materials was synthesized by electrochemical method using ethanol,water as solvent and sucrose as carbon source.The crystalline structure,morphology and electrochemical performance were investigated by X-ray diffraction,scanning electromicroscope,and charge-discharge measurements.The results showed that LiFePO4 /C was simple pure phase olivine-type crystal structure.It is noted that the LiFePO4 /C composite cathode materials have small,uniform particle sizes,and thus excellent electrochemical performance with the first discharge specific capacity of 142.3 mAh/g at 0.2 C.After 30 times cycling,the discharge specific capacity was141.2 mA h/g.