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:
Mar. 25, 2025
Filed:
Aug. 28, 2020
Applicant:
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/505 (2010.01); C01G 53/42 (2025.01); C01G 53/44 (2025.01); H01M 4/02 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/505 (2013.01); C01G 53/42 (2013.01); C01G 53/44 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2002/50 (2013.01); C01P 2002/74 (2013.01); C01P 2002/76 (2013.01); C01P 2004/03 (2013.01); C01P 2004/50 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract
A positive electrode active material for a lithium ion secondary battery, the positive electrode active material including a lithium-nickel composite oxide having a hexagonal layered structure and configured by single primary particles or by single primary particles and secondary particles with a plurality of aggregated primary particles, wherein a number proportion of the single primary particles to all of the particles is 30% or more, a ratio of a (003) diffraction peak intensity Ito a (104) diffraction peak intensity I(I/I) is 2.0 or more, and a degree of circularity is 0.93 or more and 1.00 or less.