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:
Apr. 15, 2014
Filed:
Nov. 06, 2008
Tamotsu Tano, Yamaguchi, JP;
Takashi Oyama, Yamaguchi, JP;
Hiromitsu Hashisaka, Yamaguchi, JP;
Akio Sakamoto, Tokyo, JP;
Tamotsu Tano, Yamaguchi, JP;
Takashi Oyama, Yamaguchi, JP;
Hiromitsu Hashisaka, Yamaguchi, JP;
Akio Sakamoto, Tokyo, JP;
JX Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
In the raw coke composition of the invention, as the starting material for a negative electrode material of a lithium ion secondary battery, the ratio of the crystallite size Lc(002) and lattice constant co(002) (Lc(002)/co(002)) on the 002 plane is no greater than 180, and the ratio of the crystallite size La(110) and the lattice constant ao(110) (La(110)/ao(110)) on the 110 plane is no greater than 1500, as determined by X-ray diffraction upon graphitizing in an inert gas atmosphere at a temperature of 2800° C.