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:
Jul. 27, 2010
Filed:
May. 22, 2003
Hironori Yamamoto, Tokyo, JP;
Yutaka Bannai, Tokyo, JP;
Mariko Miyachi, Tokyo, JP;
Jiro Iriyama, Tokyo, JP;
Hidemasa Kawai, Tokyo, JP;
Masato Shirakata, Tokyo, JP;
Hironori Yamamoto, Tokyo, JP;
Yutaka Bannai, Tokyo, JP;
Mariko Miyachi, Tokyo, JP;
Jiro Iriyama, Tokyo, JP;
Hidemasa Kawai, Tokyo, JP;
Masato Shirakata, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Since a first layer (a carbon layer) whose chief ingredient is carbon and a second layer (Li absorbing layer) containing particles having a theoretical capacity greater than that of graphite are formed on anode collector, high capacity and high operation voltage can be realized. Since a element having a theoretical capacity equal to or less than that of graphite is added to the particles constituting this second layer, expansion and contraction of volume according to the charge and discharge are suppressed. This enables capacity deterioration to be suppressed even though cycles go on.