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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 12603277 B1

PDFFull Text
Date of Patent:
Apr. 14, 2026

Filed:

Apr. 20, 2022

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

Applicant:

Lg Energy Solution, Ltd., Seoul, KR;

Inventors:

Hyun Chul Kim, Daejeon, KR;

Yong Ju Lee, Daejeon, KR;

Eun Kyung Kim, Daejeon, KR;

Assignee:

LG ENERGY SOLUTION, LTD., Seoul, KR;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Miriam Stagg

Assistant Examiner:

Lilia undefined Nedialkova

Int. Cl.
CPC ...
H01M 4/36 (2006.01); B01J 13/04 (2006.01); B01J 13/20 (2006.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); B01J 13/04 (2013.01); B01J 13/20 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/36 (2013.01); H01M 4/38 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01);
Abstract

A negative electrode active material which includes a silicon-based composite represented by SiO(0≤a<1), and a carbon coating layer distributed on a surface of the silicon-based composite, and which has a bimodal pore structure including nanopores and mesopores. In a lithium secondary battery including the negative electrode active material, an oxygen content in the silicon-based composite can be controlled to improve initial efficiency and capacity characteristics, and a specific surface area can also be controlled, and thus a side reaction with electrolyte can be reduced.

Find Patent Forward Citations

Kim, Hyun. (2026). Negative electrode active material for lithium secondary battery and method of preparing the same (U.S. Patent No. 12603277). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12603277

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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