Attempt was made for the first time to improve the co-precipitation method by designing a feed-in device to synthesize the olivine LiFePO₄/C composite cathode material. The crystal structure and the electrochemical performance were characterized by XRD, SEM, EDS, cycle voltammetry and galvanostatical charge-discharge testing. The material has a single crystal olivine structure with homogeneous grain sizes and shows a good electrochemical performance. The galvanostatical charge and discharge tests showed that the material gave a reversible specific capacity of 145 mAh•g^－1 at 0.1C discharge rate. After 50 cycles, there was no obvious capacity fading. The average capacities of LiFePO₄/C material at 0.2C and 0.5C were 130 and 120 mAh•g^－1, respectively. The material exhibited excellent cyclic performance.

Key words: LiFePO₄, cathode material, homogeneous precipitation, electrochemical performance