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. 30, 2025
Filed:
Jul. 21, 2020
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Nobuhiko Hojo, Osaka Fu, JP;
Yuji Tani, Osaka Fu, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 10/0525 (2010.01); H01M 10/0569 (2010.01); H01M 10/0587 (2010.01);
U.S. Cl.
CPC ...
H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); H01M 10/0587 (2013.01); H01M 2300/0034 (2013.01);
Abstract
A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a lithium ion conductive nonaqueous electrolyte, wherein the negative electrode contains graphite, an open circuit potential of the negative electrode in a fully charged state is 70 mV or less relative to lithium metal, the nonaqueous electrolyte contains a solvent, a cation, and an anion, the solvent contains a fluorine-containing cyclic carbonic acid ester, the cation includes lithium ions, and the anion includes an oxalate complex anion.