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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 10283756 B1

PDFFull Text
Date of Patent:
May. 07, 2019

Filed:

Feb. 05, 2018

Negative electrode active material, method for producing a negative electrode active material, and lithium ion secondary battery

Applicant:

Shin-etsu Chemical Co., Ltd., Tokyo, JP;

Inventors:

Takakazu Hirose, Annaka, JP;

Hiromichi Kamo, Takasaki, JP;

Hiroki Yoshikawa, Takasaki, JP;

Assignee:

SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Cynthia H Kelly

Assistant Examiner:

Monique M Willis

Int. Cl.
CPC ...
H01M 4/00 (2006.01); H01M 4/131 (2010.01); H01M 4/48 (2010.01); H01M 4/485 (2010.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 4/66 (2006.01); H01M 10/054 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/131 (2013.01); H01M 4/0404 (2013.01); H01M 4/0421 (2013.01); H01M 4/0459 (2013.01); H01M 4/1391 (2013.01); H01M 4/483 (2013.01); H01M 4/485 (2013.01); H01M 4/5825 (2013.01); H01M 4/661 (2013.01); H01M 4/662 (2013.01); H01M 10/054 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); H01M 2300/0071 (2013.01);
Abstract

The present invention is a negative electrode active material for a negative electrode active material layer of a lithium ion secondary battery, wherein: the negative electrode active material comprises silicon-based material consisting of SiO(0.5≤x≤1.6); and the negative electrode active material has two or more peaks in a region of a bond energy ranging from 520 eV to 537 eV in an O 1s peak shape given in an X-ray photoelectron spectroscopy. As a result, it is possible to provide a negative electrode active material in which a battery capacity can be increased and cycle characteristics and initial charge/discharge characteristics can be improved when used as a negative electrode active material for a lithium ion secondary battery.

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