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. 27, 2014
Filed:
Nov. 07, 2008
Yasuo Takano, Moriguchi, JP;
Atsushi Fukui, Moriguchi, JP;
Taizo Sunano, Moriguchi, JP;
Maruo Kamino, Moriguchi, JP;
Tetsuo Nakanishi, Annaka, JP;
Koichiro Watanabe, Annaka, JP;
Yasuo Takano, Moriguchi, JP;
Atsushi Fukui, Moriguchi, JP;
Taizo Sunano, Moriguchi, JP;
Maruo Kamino, Moriguchi, JP;
Tetsuo Nakanishi, Annaka, JP;
Koichiro Watanabe, Annaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
This invention provides a negative electrode material for a rechargeable battery with a nonaqueous electrolyte, characterized in that the negative electrode material contains polycrystalline silicon particles as an active material, the particle diameter of crystallites of the polycrystalline silicon is not less than 20 nm and not more than 100 nm in terms of a crystallite size determined by the Scherrer method from the full width at half maximum of a diffraction line attributable to Si (111) around 2θ=28.4° in an x-ray diffraction pattern analysis, and the true specific gravity of the silicon particles is 2.300 to 2.320.