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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 10868327 B1

PDFFull Text
Date of Patent:
Dec. 15, 2020

Filed:

Aug. 29, 2018

Negative electrode for secondary battery, secondary battery, battery pack, electric vehicle, power storage system, power tool, and electronic device

Applicant:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Inventors:

Tadashi Matsushita, Kyoto, JP;

Mitsuhiro Ue, Kyoto, JP;

Masaki Kuratsuka, Kyoto, JP;

Assignee:

Murata Manufacturing Co., Ltd., Kyoto, JP;

Attorney:

K&L Gates LLP

Primary Examiner:

Yoshitoshi Takeuchi

Int. Cl.
CPC ...
H01M 4/583 (2010.01); H01M 10/0525 (2010.01); B60K 6/46 (2007.10); H01M 4/134 (2010.01); H01M 4/587 (2010.01); B60K 6/00 (2006.01); H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/38 (2006.01); H01M 4/485 (2010.01); H01M 4/62 (2006.01); H01M 2/10 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 10/0525 (2013.01); B60K 6/00 (2013.01); B60K 6/46 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/485 (2013.01); H01M 4/583 (2013.01); H01M 4/587 (2013.01); H01M 4/623 (2013.01); H01M 2/1077 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01); H01M 2220/30 (2013.01); Y02E 60/10 (2013.01); Y02T 10/70 (2013.01);
Abstract

A secondary battery includes a negative electrode including a plurality of first negative electrode active material particles, second negative electrode active material particles, and a negative electrode binder. The first negative electrode active material particles include a carbon material, and the second negative electrode active material particles include a silicon material. The negative electrode binder includes polyvinylidene fluoride and at least a part of the negative electrode binder is provided on a part of the surface of each of the second negative electrode active material particles. A ratio M2/M1 of an abundance M2 of the negative electrode binder on the surface and in proximity to each of the second negative electrode active material particles to an abundance M1 of the negative electrode binder on the surface and in proximity to each of the first negative electrode active material particles is larger than 1.

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