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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 10998544 B1

PDFFull Text
Date of Patent:
May. 04, 2021

Filed:

Aug. 16, 2017

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

Applicant:

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

Inventors:

Takakazu Hirose, Annaka, JP;

Kohta Takahashi, Takasaki, JP;

Takumi Matsuno, Annaka, JP;

Reiko Sakai, Takasaki, JP;

Assignee:

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

Attorney:

Oliff PLC

Primary Examiner:

Jane J Rhee

Int. Cl.
CPC ...
H01M 4/13 (2010.01); H01M 4/36 (2006.01); C01B 33/113 (2006.01); H01M 4/587 (2010.01); H01M 4/48 (2010.01); H01M 4/38 (2006.01); H01M 4/485 (2010.01); H01M 4/60 (2006.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); C01B 33/113 (2013.01); H01M 4/36 (2013.01); H01M 4/366 (2013.01); H01M 4/381 (2013.01); H01M 4/48 (2013.01); H01M 4/483 (2013.01); H01M 4/485 (2013.01); H01M 4/587 (2013.01); H01M 4/604 (2013.01); H01M 4/625 (2013.01); H01M 2004/027 (2013.01);
Abstract

A negative electrode active material containing a negative electrode active material particle; the negative electrode active material particle including a silicon compound particle containing a silicon compound (SiO: 0.5≤x≤1.6), wherein the silicon compound particle contains a Li compound, and the negative electrode active material particle contains an Al element and an Na element as constituent elements, with a mass ratio M/Mof the Al element and the Na element satisfying the following Formula 1. This provides a negative electrode active material that is capable of stabilizing slurry that is produced in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle performance when it is used as a negative electrode active material for a secondary battery.0.022≤M/M≤61  Formula 1

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