公开(公告)号：EP3203553A1

公开(公告)日：2017-08-09

申请号：EP15846551.8

申请日：2015-10-02

申请人： LG Chem, Ltd.

发明人： JO, Chi Ho ,  RYU, Ji Hoon ,  KANG, Min Suk ,  SHIN, Sun Sik ,  JUNG, Wang Mo

IPC分类号： H01M4/525 ,  H01M10/052 ,  H01M2/10 ,  C01G51/00

CPC分类号： H01M4/525 ,  C01G51/42 ,  C01P2002/50 ,  C01P2002/76 ,  C01P2002/85 ,  C01P2004/04 ,  C01P2004/61 ,  C01P2006/40 ,  H01M4/366 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122

摘要： The present invention provided a positive electrode active material for a lithium secondary battery including lithium cobalt oxide particles. The lithium cobalt oxide particles include lithium deficient lithium cobalt oxide having Li/Co molar ratio of less than 1, belongs to an Fd-3m space group, and having a cubic crystal structure, in surface of the particle and in a region corresponding to a distance from 0% to less than 100% from the surface of the particle relative to a distance (r) from the surface to the center of the particle. In the positive electrode active material for a lithium secondary battery according to the present invention, the intercalation and deintercalation of lithium at the surface of a particle may be easy, and the output property and rate characteristic may be improved when applied to a battery. Accordingly, good life property and the minimization of gas generation amount may be attained even with large sized positive electrode active material.

摘要翻译： 本发明提供包含锂钴氧化物粒子的锂二次电池用正极活性物质。 钴酸锂颗粒包括Li / Co摩尔比小于1，属于Fd-3m空间群并且具有立方晶体结构的锂缺乏锂钴氧化物，在颗粒表面和对应于 相对于从表面到颗粒中心的距离（r），从颗粒表面的0％到小于100％的距离。 在根据本发明的锂二次电池用正极活性材料中，颗粒表面处的锂的嵌入和脱嵌可以是容易的，并且当施加到电池时可以提高输出特性和倍率特性。 因此，即使对于大尺寸的正极活性材料，也可以获得良好的寿命特性和气体产生量的最小化。