Abstract: Microwave synthesis of copper doped carbon coating lithium iron phosphate （LiFePO₄） was studied.Chemical composition and crystal structure have been characterized by XRD and microstructure of the sample have been investigated by SEM.Electrochemical performances were compared by tests using Cu/LiFePO₄，C/LiFePO₄,and Cu/C/LiFePO₄ as cathode materials of lithium ion battery respectively.Charge and discharge tests results showed that copper doped carbon coating LiFePO₄ formed by microwave synthesis had a good charge and discharge performance and cycle life,the initial discharge capacity reached 145 mA•h/g,discharge capacity still was 143.5 mA•h/g which was 98.96% of the initial capacity after circulated 30 times.

Key words: copper doped, carbon coating, lithium iron phosphate, microwave synthesis, electrochemical performance