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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 10879528 B1

PDFFull Text
Date of Patent:
Dec. 29, 2020

Filed:

Mar. 06, 2017

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

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Jung Hyun Choi, Daejeon, KR;

Yong Ju Lee, Daejeon, KR;

Eun Kyung Kim, Daejeon, KR;

Assignee:

LG Chem, Ltd.;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Brian R Ohara

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/13 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01); B01J 13/04 (2006.01); C23C 14/18 (2006.01); C23C 14/20 (2006.01); C23C 14/34 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); B01J 13/04 (2013.01); C23C 14/185 (2013.01); C23C 14/205 (2013.01); C23C 14/34 (2013.01); H01M 4/13 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01);
Abstract

The present invention relates to a negative electrode active material, a method of preparing the same, and a lithium secondary battery including the same. In particular, the present invention relates to a composite negative electrode active material that includes: a core capable of intercalating and deintercalating lithium ions; and a plurality of coating layers comprising two or more Si layers having different densities formed on a surface of the core, and thus has enhanced stability by minimizing the formation of cracks occurring by the repetition of charging and discharging, a method of preparing the same, and a lithium secondary battery including the same and thus exhibiting enhanced lifespan characteristics.

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