POSITIVE ELECTRODE ACTIVE MATERIAL AND FABRICATION METHOD THEREFOR, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND APPARATUS

WIPO Patent Application WO/2022/088151

A1

A positive electrode active material and a fabrication method therefor. The positive electrode active material comprises a positive electrode active material matrix and a cladding layer. The cladding layer covers a surface of the positive electrode active material matrix, the positive electrode active material matrix being Li1+a[NixCoyMnzMb]O2, wherein 0