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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 10868303 B1

PDFFull Text
Date of Patent:
Dec. 15, 2020

Filed:

Feb. 14, 2017

Negative electrode active material, material of mixed negative electrode active material, negative electrode for non-aqueous electrolyte secondary battery, lithium ion secondary battery, method for producing negative electrode active material and method for producing lithium ion secondary battery

Applicant:

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

Inventors:

Hiromichi Kamo, Takasaki, JP;

Masahiro Furuya, Takasaki, JP;

Hidekazu Awano, Takasaki, JP;

Takakazu Hirose, Annaka, JP;

Takumi Matsuno, Annaka, JP;

Katsunori Nishiura, Chiba, JP;

Nan Fang, Ichihara, JP;

Assignee:

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

Attorney:

Oliff PLC

Primary Examiner:

Jane J Rhee

Int. Cl.
CPC ...
H01M 4/48 (2010.01); H01M 4/58 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/485 (2010.01); H01M 4/38 (2006.01); H01M 4/66 (2006.01); H01M 4/587 (2010.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/483 (2013.01); H01M 4/364 (2013.01); H01M 4/382 (2013.01); H01M 4/485 (2013.01); H01M 4/5825 (2013.01); H01M 4/62 (2013.01); H01M 4/366 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); H01M 4/66 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract

A negative electrode active material contains particle of the negative electrode active material, wherein the particle of the negative electrode active material contains particle of a silicon compound which contains a silicon compound (SiO: 0.5≤x≤1.6), the particle of the silicon compound contains lithium, and the particle of the negative electrode active material has a total content rate of a polyphenylene compound component and a polycyclic aromatic component measured by TPD-MS of 1 ppm by mass or more and 4,000 ppm by mass or less. As a result, a negative electrode active material is capable of improving cycle characteristics and initial charge/discharge characteristics when it is used as a negative electrode active material of a lithium ion secondary battery.

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