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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 12676312 B1

PDFFull Text
Date of Patent:
Jul. 07, 2026

Filed:

Dec. 30, 2020

Positive electrode active material containing thermally expanded-reduced graphene oxide with a montmorillonite additive, and a lithium-sulfur secondary battery thereof

Applicant:

Lg Energy Solution, Ltd., Seoul, KR;

Inventors:

Seungbo Yang, Daejeon, KR;

Suenghoon Han, Daejeon, KR;

Myeongseong Kim, Daejeon, KR;

Kwonnam Sohn, Daejeon, KR;

Assignee:

LG ENERGY SOLUTION, LTD., Seoul, KR;

Attorney:

Birch, Stewart, Kolash & Birch, LLP

Primary Examiner:

Maria Laios

Assistant Examiner:

Lawrence undefined La Raia, III

Int. Cl.
CPC ...
H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 4/136 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/583 (2010.01); H01M 10/052 (2010.01);
U.S. Cl.
CPC ...
H01M 4/62 (2013.01); H01M 4/133 (2013.01); H01M 4/136 (2013.01); H01M 4/364 (2013.01); H01M 4/38 (2013.01); H01M 4/5815 (2013.01); H01M 4/583 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); Y02E 60/10 (2013.01);
Abstract

Disclosed is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same. More particularly, disclosed is a positive electrode for a lithium secondary battery including a sulfur-carbon composite including thermally expanded-reduced graphene oxide as a positive electrode active material and montmorillonite as an additive. The positive electrode for the lithium secondary battery not only has excellent electrochemical reactivity, but also improves the problem due to leaching of lithium polysulfide, thereby improving capacity and lifetime characteristics of the lithium secondary battery.

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