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. 21, 2023
Filed:
Mar. 23, 2021
Lg Chem, Ltd., Seoul, KR;
Woo Ram Lee, Daejeon, KR;
Woo Hyun Kim, Daejeon, KR;
Dong Jin Kim, Daejeon, KR;
Hwa Seok Chae, Daejeon, KR;
Hyun Uk Kim, Daejeon, KR;
Abstract
Provided is a method of manufacturing a positive electrode active material, which includes: (A) preparing a positive electrode active material precursor which includes a core portion including randomly aggregated primary particles and a shell portion surrounding the core portion and formed of primary particles oriented in a direction from a particle center to the outside and in which a ratio of a crystal grain size in the (100) plane to a crystal grain size in the (001) plane of the primary particles forming the shell portion is 3 or more; and (B) mixing the positive electrode active material precursor with a lithium-containing raw material and firing the mixture, wherein the lithium transition metal oxide has an average particle diameter (D) that is 0.01% to 20% reduced as compared to an average particle diameter (D) of the positive electrode active material precursor.