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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 9929403 B1

PDFFull Text
Date of Patent:
Mar. 27, 2018

Filed:

Mar. 06, 2015

Method of producing an active material powder

Applicant:

Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;

Inventors:

Yuki Kato, Gotenba, JP;

Takamasa Ohtomo, Susono, JP;

Hisatsugu Yamasaki, Gotenba, JP;

Masatsugu Kawakami, Gotenba, JP;

Assignee:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

Attorney:

Oliff PLC

Primary Examiner:

Gary Harris

Int. Cl.
CPC ...
H01M 4/13 (2010.01); H01M 4/36 (2006.01); H01M 4/485 (2010.01); C01G 33/00 (2006.01); C01G 45/12 (2006.01); H01M 4/62 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); H01M 10/0585 (2010.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01G 33/00 (2013.01); C01G 45/1242 (2013.01); H01M 4/485 (2013.01); H01M 4/62 (2013.01); C01P 2002/88 (2013.01); C01P 2004/84 (2013.01); C01P 2006/12 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 10/0585 (2013.01);
Abstract

A method of producing an active material powder includes (i) an attachment step of obtaining a powder including an active material particle, which stores and releases lithium ions at a potential of 4.5 V or higher based on Li, and a coating layer precursor, which is attached to a surface of the active material particle, by attaching an alkoxide solution containing lithium ions and niobium ions to the surface of the active material particle and drying the attached alkoxide solution; and (ii) a heating step of forming a coating layer on the surface of the active material particle by heating the powder obtained in the attachment step to be within a temperature range of 120° C. to 200° C.

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