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. 12, 2015
Filed:
Apr. 25, 2011
Noriyuki Negi, Amagasaki, JP;
Tatsuo Nagata, Ikeda, JP;
Sukeyoshi Yamamoto, Nishinomiya, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Chuo Denki Kogyo Co., Ltd., Myoko-Shi, JP;
Abstract
An inexpensive negative electrode material for a nonaqueous electrolyte secondary battery includes three types of powder materials: alloy material A; alloy material B; and a conductive material. Alloy material A includes a CoSnstructure containing Co, Sn, and Fe and has an Sn content of at least 70.1 mass % and less than 82.0 mass %. Alloy material B includes CoSnand has a lower discharge capacity than alloy material A. The proportion Rof the mass of alloy material B based on the total mass of alloy material A and B is greater than 5.9% and less than 27.1%. The content of the conductive material is at least 7 mass % and at most 20 mass % based on the total mass of alloy material A and B, and the conductive material. The exotherm starting temperature for the negative electrode material is less than 375.4° C.