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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 9537142 B1

PDFFull Text
Date of Patent:
Jan. 03, 2017

Filed:

Apr. 15, 2015

Method for manufacturing negative electrode active material for non-aqueous electrolyte secondary battery

Applicant:

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

Inventor:

Tetsuo Nakanishi, Annaka, JP;

Assignee:

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

Attorney:

Oliff PLC

Primary Examiner:

Patrick Ryan

Assistant Examiner:

Julian Anthony

Int. Cl.
CPC ...
H01M 4/82 (2006.01); H01M 6/00 (2006.01); B05D 7/00 (2006.01); B05D 3/14 (2006.01); H05H 1/02 (2006.01); B05D 3/00 (2006.01); H01M 4/1395 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 10/052 (2010.01); B02C 23/08 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/1395 (2013.01); B02C 23/08 (2013.01); H01M 4/0421 (2013.01); H01M 4/0471 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 4/38 (2013.01); H01M 4/386 (2013.01); H01M 10/052 (2013.01); H01M 2004/027 (2013.01); Y02E 60/122 (2013.01); Y02P 70/54 (2015.11);
Abstract

The present invention is a method for manufacturing a negative electrode active material for a non-aqueous electrolyte secondary battery. The method includes depositing silicon on a substrate by vapor deposition by using a metallic silicon as a raw material, the substrate having a temperature controlled to 300° C. to 800° C. under reduced pressure; and pulverizing and classifying the deposited silicon. The resulting negative electrode active material composed of silicon particles is an active material useful as a negative electrode of a non-aqueous electrolyte secondary battery in which high initial efficiency and high battery capacity of silicon are kept, cycle performance is superior, and an amount of a change in volume decreases at the time of charge and discharge.

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