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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 11909033 B1

PDFFull Text
Date of Patent:
Feb. 20, 2024

Filed:

Jan. 22, 2019

Negative electrode including first layer having low compressive strength carbon active material and silicon active material and second layer having high compressive strength carbon active material and nonaqueous electrolyte secondary battery including the same

Applicants:

Panasonic Corporation, Kadoma, JP;

Sanyo Electric Co., Ltd., Daito, JP;

Inventors:

Kouhei Tsuzuki, Hyogo, JP;

Yuki Morikawa, Hyogo, JP;

Hirokazu Wada, Osaka, JP;

Yuta Matsuo, Hyogo, JP;

Kaori Ishikawa, Hyogo, JP;

Katsunori Yanagida, Hyogo, JP;

Assignees:

PANASONIC HOLDINGS CORPORATION, Kadoma, JP;

PANASONIC ENERGY CO., LTD., Osaka, JP;

Attorney:

WHDA, LLP

Primary Examiner:

Sean P Cullen

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract

In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.

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