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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 12749677 B1

PDFFull Text
Date of Patent:
Sep. 29, 2026

Filed:

Jul. 27, 2022

Negative electrode active material, negative electrode comprising negative electrode active material, secondary battery comprising negative electrode, and method for preparing negative electrode active material

Applicant:

Lg Energy Solution, Ltd., Seoul, KR;

Inventors:

Semi Park, Daejeon, KR;

Sun Young Shin, Daejeon, KR;

Ilgeun Oh, Daejeon, KR;

Su Min Lee, Daejeon, KR;

Yong Ju Lee, Daejeon, KR;

Assignee:

LG ENERGY SOLUTION, LTD., Seoul, KR;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Lingwen R Zeng

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/583 (2010.01); H01M 4/02 (2006.01); H01M 4/13 (2010.01); H01M 4/139 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); H01M 4/364 (2013.01); H01M 4/382 (2013.01); H01M 4/483 (2013.01); H01M 4/583 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 4/13 (2013.01); H01M 4/139 (2013.01); H01M 4/362 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); Y02E 60/10 (2013.01);
Abstract

A negative electrode active material including: silicon-containing composite particles including (a) SiO, wherein 0<x<2, (b) pores, and (c) a Mg compound or a Li compound; an outer carbon layer present on the surface of the silicon-containing composite particle; and an inner carbon layer present inside the pores, in which a BET specific surface area of the negative electrode active material is 3 m/g to 15 m/g, a negative electrode including the same, a secondary battery including the negative electrode and a method for preparing the negative electrode active material.

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Park, Semi. (2026). Negative electrode active material, negative electrode comprising negative electrode active material, secondary battery comprising negative electrode, and method for preparing negative electrode active material (U.S. Patent No. 12749677). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12749677

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