Patent ID: 11894554
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 8:
9. A method for preparing a cathode active material for a lithium secondary battery, the method comprising
washing a first active material with ammonia water to obtain a second active material, the second active material comprising a lithium metal compound and a lithium compound on a surface of the lithium metal compound,
wherein the lithium metal compound is different from the lithium compound,
the content of lithium contained in the lithium compound is 0.25 parts by weight or less with respect to 100 parts by weight of the lithium metal compound,
a specific surface area of the cathode active material is 0.5 m2/g to 2.0 m2/g, and
a pH of the cathode active material is 11.5 to 12.1.