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:
Jun. 17, 2014
Filed:
Mar. 21, 2011
Nobuo Kawada, Annaka, JP;
Nobuo Kawada, Annaka, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A method for manufacturing a negative electrode material for a secondary battery with a non-aqueous electrolyte, including coating a surface of a powder with 1 to 40 mass % carbon by heat CVD treatment under an organic gas and/or vapor atmosphere at a temperature between 800° C. and 1300° C., blending lithium hydride and/or lithium aluminum hydride with the carbon-coated powder; and heating the carbon-coated powder at a temperature between 200° C. and 800° C. to be doped with lithium at a doping amount of 0.1 to 20 mass %. The powder is composed of at least one of silicon oxide represented by general formula of SiO(x=0.5 to 1.6) and a silicon-silicon oxide composite having a structure so that silicon particles having a size of 50 nm or less are dispersed to silicon oxide in an atomic order and/or a crystallite state, and having a Si/O molar ratio of 1/0.5 to 1/1.6.