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:
May. 05, 2015
Filed:
Feb. 01, 2012
Tadayoshi Tanaka, Takatsuki, JP;
Mai Yokoi, Kobe, JP;
Hiroshi Minami, Kobe, JP;
Naoki Imachi, Kobe, JP;
Tadayoshi Tanaka, Takatsuki, JP;
Mai Yokoi, Kobe, JP;
Hiroshi Minami, Kobe, JP;
Naoki Imachi, Kobe, JP;
SANYO Electric Co., Ltd., Daito-shi, JP;
Abstract
Provided is a nonaqueous electrolyte secondary battery in which a negative-electrode active material containing a graphite material and silicon or a silicon compound is used and which has an excellent charge-discharge cycle characteristic. In the nonaqueous electrolyte secondary battery, the negative-electrode active material used is an active material containing a graphite material and silicon or a silicon compound, and the negative electrode binder used comprises a polyimide and polyvinylpyrrolidone.