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:
May. 06, 2025
Filed:
Nov. 09, 2021
Applicant:
Samsung Sdi Co., Ltd., Yongin-si, KR;
Inventors:
Pilsang Yun, Yongin-si, KR;
Hyunbeom Kim, Yongin-si, KR;
Sangin Park, Yongin-si, KR;
Yongchan You, Yongin-si, KR;
Assignee:
Samsung SDI Co., Ltd., Yongin-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/525 (2009.12); H01M 4/04 (2005.12); H01M 4/505 (2009.12); H01M 10/0525 (2009.12); H01M 4/02 (2005.12);
U.S. Cl.
CPC ...
H01M 4/525 (2012.12); H01M 4/0471 (2012.12); H01M 4/505 (2012.12); H01M 10/0525 (2012.12); H01M 2004/028 (2012.12);
Abstract
A positive active material for a rechargeable lithium battery includes a lithium nickel-based metal composite oxide, wherein the positive active material includes secondary particles in which a plurality of primary particles are aggregated, a first boron coating portion present on the outer surfaces of the secondary particles, and a second boron coating portion present on surfaces of the primary particles inside the secondary particles, and a weight of the first boron coating portion is greater than a weight of the second boron coating portion.