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. 23, 2007
Filed:
Jan. 22, 2003
Hironori Yamamoto, Tokyo, JP;
Mitsuhiro Mori, Tokyo, JP;
Jiro Iriyama, Tokyo, JP;
Mariko Miyachi, Tokyo, JP;
Koji Utsugi, Tokyo, JP;
Yutaka Bannai, Tokyo, JP;
Tamaki Miura, Tokyo, JP;
Ikiko Yamazaki, Tokyo, JP;
Hironori Yamamoto, Tokyo, JP;
Mitsuhiro Mori, Tokyo, JP;
Jiro Iriyama, Tokyo, JP;
Mariko Miyachi, Tokyo, JP;
Koji Utsugi, Tokyo, JP;
Yutaka Bannai, Tokyo, JP;
Tamaki Miura, Tokyo, JP;
Ikiko Yamazaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An object of the present invention is to provide a negative electrode for a secondary battery which has large capacity and restrains a rise in resistance inside the battery and reduction in capacity even after cycles and the secondary battery using the same. A first active material layercomprising members occluding and releasing Li onto a collectoris formed and a second active material layeras an alloy layer containing metal forming alloy with lithium or lithium and metal not-forming alloy with lithium is formed thereon. The secondary battery is constituted using the negative electrode.