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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.:

US 10790512 B1

PDFFull Text
Date of Patent:
Sep. 29, 2020

Filed:

Oct. 18, 2016

Nonaqueous electrolyte secondary battery

Applicant:

Kaneka Corporation, Osaka-shi, JP;

Inventors:

Ayumi Takaoka, Osaka, JP;

Akiko Waki, Osaka, JP;

Assignee:

KANEKA CORPORATION, Osaka-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Kenneth J Douyette

Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 4/485 (2010.01); H01M 10/0525 (2010.01); H01M 4/505 (2010.01); H01M 4/36 (2006.01); H01M 4/131 (2010.01); H01M 10/0566 (2010.01); H01M 2/16 (2006.01); H01M 2/30 (2006.01); H01M 4/525 (2010.01); H01M 4/66 (2006.01); H01M 4/52 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/623 (2013.01); H01M 2/16 (2013.01); H01M 2/30 (2013.01); H01M 4/131 (2013.01); H01M 4/364 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/0566 (2013.01); H01M 4/52 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0025 (2013.01);
Abstract

The present invention is intended to provide a nonaqueous electrolyte secondary battery that is suppressed in generation of a gas and a micro short circuit of a negative electrode, while exhibiting an excellent rate characteristic. The present invention relates to a nonaqueous electrolyte secondary battery having a sealed bodythat encloses a positive electrode, a nonaqueous electrolyte solution, a negative electrode, and a separatorformed of an electrically insulating material. The negative electrodeis formed by forming a negative electrode active material layer, which contains at least a negative electrode active materialand a negative electrode binder, on a current collector. The negative electrode active materialcontains a titanium compound as a main component, the titanium compound having a particle diameter of 0.1 μm or more and 20.0 μm or less. The negative electrode binderis an acid-modified PVdF obtained by introducing a carboxyl group into a polyvinylidene fluoride (PVdF). A negative electrode water content in the sealed bodyis 400 ppm or less.

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