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:
Dec. 30, 2014
Filed:
Oct. 05, 2012
Applicant:
Showa Denko K. K., Minato-ku, Tokyo, JP;
Inventors:
Akinori Sudoh, Tokyo, JP;
Yuuichi Kamijou, Tokyo, JP;
Masako Tanaka, Tokyo, JP;
Tomohiro Abe, Tokyo, JP;
Assignee:
Showa Denko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 31/04 (2006.01); H01M 4/96 (2006.01); H01M 4/583 (2010.01); H01M 4/133 (2010.01); H01M 4/587 (2010.01); H01B 1/04 (2006.01);
U.S. Cl.
CPC ...
H01M 4/133 (2013.01); C01B 31/04 (2013.01); H01M 4/587 (2013.01); Y02E 60/122 (2013.01);
Abstract
A graphite material suitable as an electrode material for non-aqueous electrolytic secondary batteries; a method for producing the same and a carbon material for battery electrodes; and a secondary battery. The graphite material includes crystallite graphite particles wherein an oxygen amount (a) (mass %) in a region from a particle surface of the graphite material to a depth of 40 nm is within a range of 0.010≦(a)≦0.04 as determined by a peak intensity of Oobtained by HAX-PES measurement using a hard X-ray of 7,940 eV.