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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 10873082 B1

PDFFull Text
Date of Patent:
Dec. 22, 2020

Filed:

May. 16, 2017

Negative electrode active material, negative electrode, lithium ion secondary battery, method of using lithium ion secondary battery, method of producing negative electrode active material, and method of producing lithium ion secondary battery

Applicant:

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

Inventors:

Takakazu Hirose, Annaka, JP;

Reiko Sakai, Takasaki, JP;

Assignee:

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

Attorney:

Oliff PLC

Primary Examiner:

Cynthia H Kelly

Assistant Examiner:

Monique M Wills

Int. Cl.
CPC ...
H01M 4/00 (2006.01); H01M 4/58 (2010.01); H01M 4/136 (2010.01); C01B 33/113 (2006.01); H01M 10/44 (2006.01); H01M 4/48 (2010.01); H01M 4/66 (2006.01); H01M 4/36 (2006.01); C01B 33/32 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/5825 (2013.01); C01B 33/113 (2013.01); C01B 33/32 (2013.01); H01M 4/136 (2013.01); H01M 4/36 (2013.01); H01M 4/366 (2013.01); H01M 4/48 (2013.01); H01M 4/625 (2013.01); H01M 4/66 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); C01P 2002/74 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract

A negative electrode active material including a negative electrode active material particle; the negative electrode active material particle including a silicon compound shown by SiO(0.5≤x≤1.6), wherein at least part of the Sicontained in the negative electrode active material particle is to be changed to at least one state selected from valence states of Si(y is any of 0, 1, 2, and 3) in occlusion of Li in the negative electrode active material. This provides a negative electrode active material that is capable of increasing battery capacity and improving cycle performance when it is used as a negative electrode active material for a secondary battery.

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