Cathode active material for lithium secondary batteries

摘要

An improved cathode active material for a lithium secondary battery is disclosed. The cathode active material LiCoO2 is obtained by sintering Li2CO3 and CoCO3, which contains residual Li2CO3 not exceeding 10 wt% and has a specific surface area of no greater than 2 m<2>/g. The cathode active material of the present invention is improved in discharge capacity and self-discharge.