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:
Sep. 16, 2014
Filed:
Mar. 21, 2008
Goo-jin Jeong, Yongin-si, KR;
Min-sook Sung, Yongin-si, KR;
Sang-min Lee, Yongin-si, KR;
Yong-mook Kang, Yongin-si, KR;
Wan-uk Choi, Yongin-si, KR;
Sung-soo Kim, Yongin-si, KR;
Goo-Jin Jeong, Yongin-si, KR;
Min-Sook Sung, Yongin-si, KR;
Sang-Min Lee, Yongin-si, KR;
Yong-Mook Kang, Yongin-si, KR;
Wan-Uk Choi, Yongin-si, KR;
Sung-Soo Kim, Yongin-si, KR;
Samsung SDI Co., Ltd., Yongin-si, KR;
Abstract
Negative active materials for rechargeable lithium batteries are provided. One negative active material includes a metal matrix, and an intermetallic compound including a Si active metal and an additive metal dispersed in the metal matrix. The additive metal may be Ca, Mg, Na, K, Sr, Rb, Ba, Cs, or a combination thereof. The metal matrix may comprise Cu and Al. The negative active material may comprise a X(aM-bSi)—Y(cCu-dAl) material, where X is from about 30 to about 70 wt %, Y is from about 30 to about 70 wt %, X+Y is 100 wt %, a+b is 100 wt %, a is from about 20 to 80 wt %, b is from about 20 to 80 wt %, c+d is 100 wt %, c is from about 80 to about 95 wt %, d is from about 5 to about 20 wt %, and M may be Ca, Mg, Na, K, Sr, Rb, Ba, Cs, or a combination thereof.