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.:
Date of Patent:
Nov. 28, 2017
Filed:
Jun. 25, 2013
Applicant:
MT Carbon Co., Ltd., Tokyo, JP;
Inventors:
Yohei Yagishita, Tokyo, JP;
Kohei Yamaguchi, Hiroshima, JP;
Miwa Katayama, Hiroshima, JP;
Wataru Oda, Hiroshima, JP;
Akemi Inami, Hiroshima, JP;
Yoshiki Kubo, Hiroshima, JP;
Seiji Okazaki, Hiroshima, JP;
Akio Sakamoto, Tokyo, JP;
Assignee:
MT Carbon Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 4/133 (2010.01); C01B 31/04 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01B 1/04 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/133 (2013.01); C01B 31/04 (2013.01); H01B 1/04 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); Y02T 10/7011 (2013.01);
Abstract
A graphite material for a negative electrode of a lithium-ion secondary battery is provided. A ratio Lc(112)/Lc(006) defined as a ratio of expansion of graphene sheets to sheet displacement ranges from 0.08 to 0.11, both inclusive. A crystallite size Lc(006) calculated from a wide-angle X-ray diffraction line ranges from 30 nm to 40 nm, both inclusive. An average particle size ranges from 3 μm to 20 μm, both inclusive.