logo

For the Inventor, By the Inventor

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 10319993 B1

PDFFull Text
Date of Patent:
Jun. 11, 2019

Filed:

Dec. 19, 2014

Negative electrode for non-aqueous electrolyte secondary battery

Applicant:

Sanyo Electric Co., Ltd., Daito-shi, Osaka, JP;

Inventors:

Na Wang, Osaka, JP;

Shinji Kasamatsu, Tokushima, JP;

Yoshio Kato, Osaka, JP;

Assignee:

SANYO Electric Co., Ltd., Daito-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Daniel S Gatewood

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/58 (2010.01); H01M 4/583 (2010.01); H01M 4/587 (2010.01); H01M 10/056 (2010.01); H01M 10/0525 (2010.01); H01M 4/134 (2010.01); H01M 4/62 (2006.01); H01M 4/38 (2006.01); H01M 4/133 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/583 (2013.01); H01M 4/587 (2013.01); H01M 4/62 (2013.01); H01M 4/622 (2013.01); H01M 10/056 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); H01M 2300/002 (2013.01);
Abstract

Gas evolution during the high-temperature storage of a non-aqueous electrolyte secondary battery is suppressed to improve the high-temperature storage characteristics of the non-aqueous electrolyte secondary battery. A negative electrode for a non-aqueous electrolyte secondary battery contains silicon-containing particles and graphite particles. A covering layer is disposed on each of the graphite particles. The covering layer contains a first covering material and a second covering material, the first covering material containing particles that can be made to swell with a non-aqueous electrolytic solution, the second covering material containing a water-soluble polymer material. The first covering material is disposed on a surface of each of the graphite particles. The mass ratio of the second covering material to the first covering material is higher than 1.

Find Patent Forward Citations

Loading…