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. 09, 2001
Filed:
Apr. 13, 2000
Shinichiro Yamada, Kanagawa, JP;
Takuya Endo, Kanagawa, JP;
Hiroshi Imoto, Kanagawa, JP;
Guohua Li, Kanagawa, JP;
Hiroaki Tanizaki, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
A material for a negative electrode capable of preventing change in the volume of an active material occurring when lithium is doped/dedoped to improve resistance against cycle operations. A material for a negative electrode contains a mixture of a non-carbon material and a carbon material, wherein when an assumption is made that the average particle size of the non-carbon material is R,and the average particle size of the carbon material is R,, the ratio R,/R,is not higher than one, and when an assumption is made that the weight of the non-carbon material is W,and the weight of the carbon is W,, the ratio W,/W,is not higher than one or a mixture of a silicon compound and a carbon material, wherein when an assumption is made that the average particle size of the silicon compound is R,and the average particle size of the carbon material is R,, the ratio R,/R,is not higher than one.