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. 10, 2014
Filed:
Sep. 28, 2011
Yuta Kimura, Aichi, JP;
Yuichiro Tago, Aichi, JP;
Kenji Kodama, Aichi, JP;
Satoshi Takemoto, Aichi, JP;
Yuta Kimura, Aichi, JP;
Yuichiro Tago, Aichi, JP;
Kenji Kodama, Aichi, JP;
Satoshi Takemoto, Aichi, JP;
Daido Steel Co., Ltd., Nagoya, Aichi, JP;
Abstract
A negative electrode active material for a lithium secondary battery, which includes a composition including Si in an amount of from 30% to 65% by mass of the negative electrode active material, includes a two phase matrix structure including an Sn—Cu based alloy matrix including an Sn content of 50% by mass or more of the Sn—Cu based alloy matrix, Si crystallites dispersed in the Sn—Cu based alloy matrix, and an Si—X based alloy crystallized so as to at least partially cover the Si crystallites, in which X is at least one element selected from Fe, Ni, and Co, and is added in an amount of 1% by mass or more of the negative electrode active material.