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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 12731857 B1

PDFFull Text
Date of Patent:
Sep. 08, 2026

Filed:

Oct. 27, 2023

Separator for secondary battery, manufacturing method thereof, and lithium secondary battery

Applicant:

SK on Co., Ltd., Seoul, KR;

Inventors:

Chang Mook Hwang, Daejeon, KR;

Hyun Ji Kim, Daejeon, KR;

Jong Hyeok Lee, Daejeon, KR;

Yoon Ji Jo, Daejeon, KR;

Assignee:

SK On Co., Ltd., Seoul, KR;

Attorney:

Jones Day

Primary Examiner:

Matthew J Daniels

Int. Cl.
CPC ...
H01M 50/403 (2021.01); H01M 50/406 (2021.01); H01M 50/431 (2021.01); H01M 50/434 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01);
U.S. Cl.
CPC ...
H01M 50/406 (2021.01); H01M 50/431 (2021.01); H01M 50/434 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01);
Abstract

Provided are a separator for a secondary battery, a manufacturing method thereof, and a lithium secondary battery including the same, having appropriate porosity and an appropriate pore size to lead to excellent strength and safety, and having excellent ion conductivity and resistance characteristics due to interconnected pore passages. The manufacturing method of a separator for a secondary battery includes: molding a separator manufacturing composition into a separator manufacturing sheet; and extracting a diluent from the separator manufacturing sheet with a polar aprotic organic solvent.

Find Patent Forward Citations

Hwang, Chang. (2026). Separator for secondary battery, manufacturing method thereof, and lithium secondary battery (U.S. Patent No. 12731857). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12731857

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

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