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. 31, 2013
Filed:
Mar. 16, 2012
Takashi Suzuki, Yokohama, JP;
Akio Sakamoto, Tokyo, JP;
Tamotsu Tano, Yamaguchi, JP;
Kazuhisa Nakanishi, Yamaguchi, JP;
Takashi Oyama, Yamaguchi, JP;
Takashi Suzuki, Yokohama, JP;
Akio Sakamoto, Tokyo, JP;
Tamotsu Tano, Yamaguchi, JP;
Kazuhisa Nakanishi, Yamaguchi, JP;
Takashi Oyama, Yamaguchi, JP;
JX Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
To provide a negative electrode carbon material capable of suppressing capacity degradation which will occur due to repetition of a charge/discharge cycle, storage under a charged state, float charging, or the like. An artificial graphite for a negative electrode of a lithium secondary battery having a c-axis crystallite size L (112) of from 2.0 to 4.2 nm as calculated from a (112) diffraction line obtained by X-ray wide-angle diffractometry and having a half-value width Δνof from 15 to 19 cmfor a peak appearing in a wavelength region of from 1580 cm±100 cmin the Raman spectroscopy using an argon ion laser light having a wavelength of 5145 angstrom.