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:
Jun. 17, 2025
Filed:
Apr. 19, 2024
Applicant:
Posco Chemical Co., Ltd, Pohang-si, KR;
Inventors:
Assignee:
POSCO CHEMICAL CO., LTD., Pohang-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/131 (2010.01); C01G 53/82 (2025.01); H01M 4/04 (2006.01); H01M 4/136 (2010.01); H01M 4/36 (2006.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/131 (2013.01); C01G 53/82 (2025.01); H01M 4/0402 (2013.01); H01M 4/136 (2013.01); H01M 4/366 (2013.01); H01M 4/58 (2013.01); H01M 10/0525 (2013.01);
Abstract
The present disclosure relates to a positive electrode active material for rechargeable lithium ion batteries and a method of preparing the positive electrode active material, in which a compound including sulfur is used as an additive in a wet treatment process to remove residual lithium impurities (LiOH, LiCO) present on a surface of the positive electrode active material, such that the residual lithium impurities are effectively removed without loss of capacity while a Li—S compound coating layer is formed on the surface thereof, thereby reducing resistance and leakage current.