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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 10431824 B1

PDFFull Text
Date of Patent:
Oct. 01, 2019

Filed:

Mar. 23, 2015

Negative electrode carbon material, method for producing negative electrode carbon material, negative electrode for lithium secondary battery, and lithium secondary battery

Applicant:

Nec Corporation, Tokyo, JP;

Inventors:

Qian Cheng, Tokyo, JP;

Noriyuki Tamura, Tokyo, JP;

Assignee:

NEC Corporation, Tokyo, JP;

Attorney:

Wilmer Cutler Pickering Hale and Dorr LLP

Primary Examiner:

Alexander Usyatinsky

Int. Cl.
CPC ...
H01M 4/587 (2010.01); B01J 13/04 (2006.01); H01M 4/36 (2006.01); H01M 10/052 (2010.01); C01B 32/20 (2017.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/587 (2013.01); B01J 13/04 (2013.01); C01B 32/20 (2017.08); H01M 4/366 (2013.01); H01M 10/052 (2013.01); C01P 2004/20 (2013.01); C01P 2004/80 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); Y02T 10/7011 (2013.01);
Abstract

In order to provide a negative electrode carbon material capable of providing a lithium secondary battery improved in the capacity and the rate characteristic, there are carried out a first heat treatment of subjecting graphite particles to a heat treatment in an oxidizing atmosphere, and following the first heat treatment, a second heat treatment of subjecting the resulting graphite particles to a heat treatment in an inert gas atmosphere at a higher temperature than in the first heat treatment.

Find Patent Forward Citations

Cheng, Qian. (2019). Negative electrode carbon material, method for producing negative electrode carbon material, negative electrode for lithium secondary battery, and lithium secondary battery (U.S. Patent No. 10431824). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10431824

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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