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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.:

US 9306216 B1

PDFFull Text
Date of Patent:
Apr. 05, 2016

Filed:

Nov. 06, 2012

Negative active material, method of preparing the same, negative electrode for lithium secondary battery including negative active material, and lithium secondary battery including negative electrode

Applicant:

Samsung Sdi Co., Ltd., Yongin-si, Gyeonggi-do, KR;

Inventors:

Sung-Hwan Moon, Yongin-si, KR;

Jae-Hyuk Kim, Yongin-si, KR;

Seung-Uk Kwon, Yongin-si, KR;

Chang-Ui Jeong, Yongin-si, KR;

Yo-Han Park, Yongin-si, KR;

Soon-Sung Suh, Yongin-si, KR;

Chun-Gyoo Lee, Yongin-si, KR;

Jong-Seo Choi, Yongin-si, KR;

Yury Matulevich, Yongin-si, KR;

Assignee:

Samsung SDI Co., Ltd., Yongin-si, KR;

Attorney:

Lewis Roca Rothgerber Christie LLP

Primary Examiner:

Cynthia K Walls

Int. Cl.
CPC ...
H01M 4/1395 (2010.01); H01M 4/134 (2010.01); H01M 4/13 (2010.01); H01M 4/38 (2006.01); H01B 1/02 (2006.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); C22C 28/00 (2006.01); B82Y 30/00 (2011.01);
U.S. Cl.
CPC ...
H01M 4/386 (2013.01); C22C 28/00 (2013.01); H01B 1/023 (2013.01); H01M 4/04 (2013.01); H01M 4/134 (2013.01); H01M 4/1395 (2013.01); H01M 10/0525 (2013.01); B82Y 30/00 (2013.01); Y02E 60/122 (2013.01); Y02T 10/7011 (2013.01);
Abstract

A negative active material for a rechargeable lithium battery includes a Si—Al—Fe alloy represented by Formula 1. The Si—Al—Fe alloy includes a Si phase and an alloy phase, and the alloy phase includes Si, Al, and Fe in a ratio of atomic percentages of about 3:3:2:Si-Al-Fe  Formula 1wherein 50 at %≦x≦90 at %, 5 at %≦y≦30 at %, 5 at %≦z≦30 at %, and x+y+z=100 at %.

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