logo

For the Inventor, By the Inventor

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 10777809 B1

PDFFull Text
Date of Patent:
Sep. 15, 2020

Filed:

Apr. 06, 2017

Method for producing negative electrode active material for lithium ion secondary batteries

Applicants:

Jnc Corporation, Tokyo, JP;

Jnc Petrochemical Corporation, Tokyo, JP;

Inventors:

Yoshihito Takano, Chiba, JP;

Tetsuro Kizaki, Chiba, JP;

Masakazu Kondo, Chiba, JP;

Assignees:

JNC CORPORATION, Tokyo, JP;

JNC PETROCHEMICAL CORPORATION, Tokyo, JP;

Attorney:

JCIPRNET

Primary Examiner:

Brian K Talbot

Int. Cl.
CPC ...
H01M 4/131 (2010.01); H01M 4/36 (2006.01); C01B 33/113 (2006.01); C09D 183/04 (2006.01); H01M 4/1391 (2010.01); C08K 3/20 (2006.01); C08G 77/38 (2006.01); C08K 9/06 (2006.01); H01M 4/04 (2006.01); C08G 77/04 (2006.01); C08G 77/00 (2006.01); H01M 4/485 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01B 33/113 (2013.01); C08G 77/04 (2013.01); C08G 77/38 (2013.01); C08G 77/80 (2013.01); C08K 3/20 (2013.01); C08K 9/06 (2013.01); C09D 183/04 (2013.01); H01M 4/049 (2013.01); H01M 4/131 (2013.01); H01M 4/1391 (2013.01); H01M 4/485 (2013.01); C01P 2004/03 (2013.01); C01P 2004/82 (2013.01); C01P 2006/40 (2013.01); H01M 2004/027 (2013.01);
Abstract

A method for producing a negative electrode active material for lithium ion secondary batteries containing a silicon-titanium oxide composite, which is characterized in that: the silicon-titanium oxide composite contained in the negative electrode active material for lithium ion secondary batteries is obtained by coating a silicon oxide by a titanium oxide; the silicon oxide is obtained by subjecting a polymerized silsesquioxane (PSQ), which has a structure of formula (1) and is obtained by subjecting a silicon compound to hydrolysis and a condensation polymerization reaction, to a heat treatment in an inert gas atmosphere, and is represented by general formula SiOxCyHz (wherein 0.5<x<1.8, 0≤y<5 and 0≤z<0.4); and after coating the silicon oxide with a titanium oxide, the resulting product is subjected to a heat treatment in a reducing gas atmosphere.

Find Patent Forward Citations

Loading…