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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 11658289 B1

PDFFull Text
Date of Patent:
May. 23, 2023

Filed:

Jun. 02, 2021

Negative electrode active material, mixed negative electrode active material, and method for producing negative electrode active material

Applicant:

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

Inventors:

Takakazu Hirose, Annaka, JP;

Hiromichi Kamo, Takasaki, JP;

Assignee:

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

Attorney:

Oliff PLC

Primary Examiner:

Jonathan G Jelsma

Assistant Examiner:

Omar M Kekia

Int. Cl.
CPC ...
H01M 4/36 (2006.01); C01B 33/32 (2006.01); H01M 4/587 (2010.01); H01M 4/48 (2010.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); C01B 33/32 (2013.01); H01M 4/36 (2013.01); H01M 4/366 (2013.01); H01M 4/38 (2013.01); H01M 4/48 (2013.01); H01M 4/58 (2013.01); H01M 4/587 (2013.01); H01M 4/5825 (2013.01); H01M 4/625 (2013.01); C01P 2002/60 (2013.01); C01P 2002/72 (2013.01); C01P 2002/86 (2013.01); C01P 2004/61 (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 including a negative electrode active material layer including a negative electrode active material including a negative electrode active material particle. The negative electrode active material particle includes a silicon compound particle including a silicon compound (SiOx: 0.5≤x≤1.6). The silicon compound particle includes crystalline Li2SiO3 in at least part of the silicon compound particle. Among a peak intensity A derived from Li2SiO3, a peak intensity B derived from Si, a peak intensity C derived from Li2Si2O5, and a peak intensity D derived from SiO2 which are obtained from a 29Si-MAS-NMR spectrum of the silicon compound particle, the peak intensity A is the highest intensity, and the peak intensity A and the peak intensity C satisfy a relationship of the following formula 1:Formula 1: 3C<A.

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