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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 9966594 B1

PDFFull Text
Date of Patent:
May. 08, 2018

Filed:

May. 04, 2012

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

Applicants:

Beom-kwon Kim, Yongin-si, KR;

Jae-myung Kim, Yongin-si, KR;

So-ra Lee, Yongin-si, KR;

Chang-su Shin, Yongin-si, KR;

Ui-song DO, Yongin-si, KR;

Inventors:

Beom-Kwon Kim, Yongin-si, KR;

Jae-Myung Kim, Yongin-si, KR;

So-Ra Lee, Yongin-si, KR;

Chang-Su Shin, Yongin-si, KR;

Ui-Song Do, Yongin-si, KR;

Assignee:

Samsung SDI Co., Ltd., Giheung-go, Yongin-si, Gyeonggi-do, KR;

Attorney:

Robert E. Bushnell, Esq.

Primary Examiner:

Stephan Essex

Int. Cl.
CPC ...
H01M 4/583 (2010.01); H01M 4/13 (2010.01); H01M 4/38 (2006.01); H01M 4/60 (2006.01); H01M 4/133 (2010.01); B82Y 30/00 (2011.01); H01M 4/134 (2010.01); H01M 4/1393 (2010.01); H01M 4/1395 (2010.01); H01M 4/36 (2006.01); H01M 4/02 (2006.01); B82Y 40/00 (2011.01);
U.S. Cl.
CPC ...
H01M 4/133 (2013.01); B82Y 30/00 (2013.01); H01M 4/134 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); B82Y 40/00 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract

A negative active material, a method of preparing the same, and a lithium battery including the negative active material are disclosed. The negative active material includes a silicon-based nanocore and a first amorphous carbonaceous coating layer that is formed of carbonized organic material and that is uniformly and continuously formed on a surface of the silicon-based nanocore, whereby irreversible capacity losses due to volumetric expansion/contraction caused when a lithium battery is charged and discharged are compensated and cycle lifetime characteristics are enhanced.

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