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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 9315882 B1

PDFFull Text
Date of Patent:
Apr. 19, 2016

Filed:

Feb. 20, 2014

Method for preparing anode active material, anode active material prepared therefrom and lithium secondary battery having the same

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Mi-Rim Lee, Seoul, KR;

Yong-Ju Lee, Daejeon, KR;

Je-Young Kim, Daejeon, KR;

Hye-Ran Jung, Busan, KR;

Assignee:

LG Chem, Ltd., , KR;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Jacob Marks

Int. Cl.
CPC ...
H01M 4/02 (2006.01); C22C 29/12 (2006.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/485 (2010.01); H01M 4/139 (2010.01); H01M 4/38 (2006.01); H01M 4/131 (2010.01); H01M 10/052 (2010.01); H01M 4/1391 (2010.01); H01M 4/40 (2006.01); H01M 4/48 (2010.01);
U.S. Cl.
CPC ...
C22C 29/12 (2013.01); H01M 4/139 (2013.01); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/485 (2013.01); H01M 4/628 (2013.01); H01M 4/131 (2013.01); H01M 4/1391 (2013.01); H01M 4/40 (2013.01); H01M 4/483 (2013.01); H01M 4/625 (2013.01); H01M 10/052 (2013.01); Y02E 60/122 (2013.01);
Abstract

The present invention relates to a method for preparing an anode active material, comprising (S1) forming a shell being a coating layer comprising a carbon material on the surface of a core comprising silicon oxide particles, to obtain a silicon oxide-carbon composite having a core-shell structure; (S2) mixing the silicon oxide-carbon composite with an oxygen-containing lithium salt, followed by heat treatment to produce a silicon oxide-lithium alloy, thereby obtaining a (SiO—Li)—C (0<x<1.5, 0<y<4) composite having a core-shell structure; and (S3) washing the surface of the (SiO—Li)—C composite having a core-shell structure and drying the composite, and an anode active material prepared by the method.

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Lee, Mi-Rim. (2016). Method for preparing anode active material, anode active material prepared therefrom and lithium secondary battery having the same (U.S. Patent No. 9315882). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9315882

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