A New Synthesis Technology of Cathode Material LiMn_2O_4 for Lithium Ion Battery

Wet ball-milling and rotating synthesizing were combined to form a new synthesis technology of cathode materials LiMn2O4 for lithium ion battery. XRD results show that the prepared LiMn2O4 is pure with a spinel structure type. The LiMn2O4 powders have uniform chemical composition and narrow particle size distribution. The first charge capacity and the discharge capacity of LiMn2O4 were 124mAh/g and 115mAh/g, respectively. And the discharge capacity decayed to above 100 mAh/g after 30 charge and discharge cycles, indicating an excellent cycle stability of the reversible capacity. The raw materials can be perfectly mixed uniformly with a uniform particle size distribution by using ball wet milling. The temperature, particle size, crystal structure and chemical composition of the materials are homogenous during rotating sintering, therefore, the final production LiMn2O4 has good electrochemical properties. The industrialization prospect of the new synthesis technology is very attractive.