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:
Oct. 31, 2000
Filed:
Feb. 21, 1996
Takamasa Kawakubo, deceased, late of Tano-gun, JP;
Masataka Wakihara, Yokohama, JP;
Mori Nagayama, Tokyo, JP;
Mitsubishi Pencil Co., Ltd., Tokyo, JP;
Abstract
A high crystallinity powdery graphite is mixed with an organic binder capable of forming a low crystallinity carbon after firing. A high shearing force is applied to the mixture so that a composition is obtained wherein both the components are dispersed in each other under a mechano-chemical reaction. Then a paste of the composition is extruded so that the high crystallinity graphite is highly oriented. A green extrudate of the composition is fired in an inert atmosphere or a non-oxidation atmosphere at a temperature in a range between 500 and 1,100.degree. C. so that the organic binder contained therein is carbonized and a graphite-carbon carbonaceous composite of an amorphous or random layered structure is obtained, which then is ground and used as a cathode for a lithium ion secondary battery.