锂离子电池正极材料的组合化学设计及相变机理

Combinatorial design of Li-ion battery cathode materials and mechanism of their phase transitions

将组合化学应用于功能电极材料开发 ,设计出锂离子电池正极材料三角形分子库。采用空间标码、高温固相平行合成法 ,以锂、钴、锰、镍 4种元素的化合物为原料 ,合成了锂离子二次电池的正极材料。以所测材料的充放电性能为筛选指标 ,成功地确定了电化学性能优良、组成构型一定的正极材料。实验中发现正极材料中因钴、镍、锰的配比不同而产生的相变现象 。

The triangle molecular library of the cathode materials of Li-ion batteries was designed. The Li-ion battery cathode materials were prepared by the use of the parallel high-temperature-solid-state synthesis and spatially addressable library of the cathode materials. The raw materials of combinatorial library were synthesized by the compounds including lithium, cobalt, manganese and nickel. Excellent and stable cathode materials were identified by current-voltage method and the phase transition mechanism of some cathode materials of the triangle molecular library was studied.