Patent ID: 11949099
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 8:
9. A preparation method of an electrode active material comprising a core and a coating layer, comprising:
providing a core material and a coating layer forming material, wherein the core material comprises a ternary material selected from the group consisting of lithium nickel cobalt manganese oxides, lithium nickel cobalt aluminum oxides, or a combination thereof, and the coating layer forming material is a solution comprising a solvent, a sulfur-containing compound, and a lithium-containing compound, and the sulfur-containing compound is selected from the group consisting of sulfamide, aminomethanesulfonic acid, lithium bisfluorosulfonimide, thio-propionamide, thio-isobutyramide, propylene sulfide, and methyl ethyl sulfide;
disposing the coating layer forming material on the core material; and
curing the coating layer forming material and the core material to form the coating layer and the core, wherein the core comprises the core material, the coating layer is disposed on at lease part of a surface of the core and comprises a reaction product formed by the coating layer forming material, the reaction product comprises Li, S, and O, and a weight content of element S in the electrode active material is 500-5000 ppm.