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:
Sep. 22, 2020
Filed:
Sep. 13, 2018
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Eiko Kashiwazaki, Osaka, JP;
Chikara Murakami, Osaka, JP;
Assignee:
SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); H01M 10/05 (2010.01); H01M 2/14 (2006.01);
U.S. Cl.
CPC ...
H01M 2/16 (2013.01); H01M 2/1653 (2013.01); H01M 10/05 (2013.01); H01M 2/145 (2013.01);
Abstract
With a nonaqueous electrolyte secondary battery separator having a radical concentration of 5000×10spins/mg to 90000×10spins/mg, wherein the concentration is calculated from a peak at a g-value of not less than 2.010 in an electron spin resonance spectrum obtained through electron spin resonance analysis using a microwave having a frequency of 9.4 GHz, it is possible to provide a nonaqueous electrolyte secondary battery having a high battery resistance decreasing rate before and after battery formation.