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:
Feb. 02, 2021
Filed:
Aug. 15, 2019
Lg Chem, Ltd., Seoul, KR;
Ju Kyung Shin, Daejeon, KR;
Wang Mo Jung, Daejeon, KR;
Byung Chun Park, Daejeon, KR;
Ji Hoon Ryu, Daejeon, KR;
Sang Min Park, Daejeon, KR;
Sang Wook Lee, Daejeon, KR;
Abstract
A method for positive electrode active material for a secondary battery includes preparing a precursor by reacting a nickel raw material, a cobalt raw material and an M1 raw material; forming a first surface-treated layer including an oxide of Formula 2 below, on a surface of a core including a lithium composite metal oxide of Formula 1 below, by mixing the precursor with a lithium raw material and an M3 raw material, firing the resultant mixture; and forming a second surface-treated layer including a lithium compound of Formula 3 below, on the core with the first surface-treated layer formed thereon,LiNiCoM1M3M2O  [Formula 1]LiM4O  [Formula 2]LiM5A  [Formula 3]wherein, in Formulae 1 to 3, A, M1 to M5, a, x, y, z, w, m, n, p, and q are the same as those defined in the specification.