The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2025
Filed:
Aug. 13, 2019
SK Innovation Co., Ltd., Seoul, KR;
SK ON CO., LTD., Seoul, KR;
Abstract
A cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium metal oxide particle which includes a core part and a shell part and contains nickel (Ni), cobalt (Co) and manganese (Mn). A total Ni content of the lithium metal oxide particle is 70 mol % or more based on a total 100 mol % of Ni, Co and Mn. The shell part includes a depth region in a range of 10 to 100 nm from a surface of the lithium metal oxide particle, and a Co content thereof in the depth region is 1.4 to 6 times a Co content of the core part. Stability of the lithium secondary battery may be improved through surface treatment using high content of Co.