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:
Aug. 10, 2021
Filed:
Oct. 31, 2017
Applicants:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Tanaka Chemical Corporation, Fukui, JP;
Inventors:
Jun-ichi Kageura, Ehime, JP;
Hiroyuki Kurita, Osaka, JP;
Kimiyasu Nakao, Fukui, JP;
Ryota Kobayashi, Fukui, JP;
Assignees:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
TANAKA CHEMICAL CORPORATION, Fukui, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/505 (2010.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/525 (2013.01); H01M 4/0435 (2013.01); H01M 4/131 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01G 53/44 (2013.01); C01P 2004/61 (2013.01); C01P 2006/11 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract
The present invention provides a positive electrode active material for lithium secondary batteries including: secondary particles obtained by aggregating primary particles capable of being doped and de-doped with lithium ions, in which the secondary particles have pores, and pore distribution obtained by a mercury intrusion method satisfies requirements (1) and (2) below: