SODIUM ION POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, AND SODIUM ION BATTERY

WIPO Patent Application WO/2023/092930

A1

Provided in the present invention are a sodium ion positive electrode material and a preparation method therefor, and a sodium ion battery. The sodium ion positive electrode material comprises a manganese-based positive electrode material and a coating layer coating the manganese-based positive electrode material, wherein the chemical general formula of the manganese-based positive electrode material is NaxMnyM1-yO2, wherein M is selected from any one of Cu, Fe, Co and Ni, 0.5≤x≤1, and 0.5≤y≤1; and the coating layer is a lithium-containing ternary material, and the chemical general formula of the lithium-containing ternary material is LiNiaCobMncO2, where 0