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:
Jan. 06, 2004
Filed:
May. 21, 2001
Shigeru Yao, Ichihara, JP;
Shyusei Ohya, Ichihara, JP;
Yukihiko Asano, Ichihara, JP;
Toshikazu Hamamoto, Ube, JP;
Kazuhiro Miyoshi, Ube, JP;
Ube Industries, Ltd., , JP;
Abstract
An electrode material for a secondary cell comprising as its essential component a powder of graphite having a crystallinity of 90% or more obtained by graphitizing a highly heat resistant polymer compact in an anaerobic atmosphere and crushing into a powder, and a process for the production of an electrode material for a secondary cell comprising heating and graphitizing a composition in which 0-10 wt % of a boron compound is added to a highly heat-resistant polymer to produce a powder of graphite having crystallinity of 90% or more contained as its essential component. An electrode material for a secondary cell having excellent charge/discharge cycle life and discharge voltage performance is provided.