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:
Oct. 22, 2024
Filed:
Feb. 26, 2019
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Akihiro Kawakita, Osaka, JP;
Takeshi Ogasawara, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); C01P 2004/50 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract
A lithium-containing complex transition metal oxide forming the positive electrode active material of a non-aqueous electrolyte secondary cell in one embodiment is a secondary particle obtained by aggregating primary particles and has a BET specific surface area of 0.9 m/g or less. The surface of each primary particle comprises 0.3 to 2.5% lithium carbonate, no more than 0.35% lithium hydroxide, and 2 to 200 ppm of a nitrogen compound relative to the total mass of the lithium-containing complex transition metal oxide.