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. 26, 2005
Filed:
Jun. 07, 2002
Kenji Fukuda, Fukuoka, JP;
Tadanori Tsunawaki, Fukuoka, JP;
Tatsuo Umeno, Fukuoka, JP;
Kohei Murayama, Fukuoka, JP;
Yoshinori Yasumoto, Fukuoka, JP;
Youichiro Hara, Fukuoka, JP;
Kenji Fukuda, Fukuoka, JP;
Tadanori Tsunawaki, Fukuoka, JP;
Tatsuo Umeno, Fukuoka, JP;
Kohei Murayama, Fukuoka, JP;
Yoshinori Yasumoto, Fukuoka, JP;
Youichiro Hara, Fukuoka, JP;
Mitsui Mining Co., Ltd., Tokyo, JP;
Abstract
An anode material for lithium secondary battery, which comprises graphite particles and a crystalline carbon coating layer formed thereon, wherein each graphite particle has a bent laminate structure inside, is produced by grinding a graphite of 5 mm or less in average particle diameter using an impact grinder to produce graphite particles of 100 μm or less in average particle diameter having a bent laminate structure inside each particle and then subjecting the graphite particles to chemical vapor deposition in a fluidized bed type reaction furnace to form a crystalline carbon coating layer on the graphite particles.