关键词: 正极材料LiMn₂O₄, 球磨湿混, 旋转合成, 锂离子电池, 电化学性能

Abstract: 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.

Key words: LiMn₂O₄ cathode material, wet ball-milling, rotating synthesizing, lithium ion battery, electrochemical properties