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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 12230837 B1

PDFFull Text
Date of Patent:
Feb. 18, 2025

Filed:

Aug. 09, 2019

Separator having coating layer with ternary acrylic copolymer and inorganic particles with different particle diameters, and lithium secondary battery comprising same

Applicant:

Samsung Sdi Co., Ltd., Yongin-si, KR;

Inventors:

Jungyoon Lee, Yongin-si, KR;

Gain Kim, Yongin-si, KR;

Yangseob Kim, Yongin-si, KR;

Yongkyoung Kim, Yongin-si, KR;

Yeonjoo Choi, Yongin-si, KR;

Assignee:

Samsung SDI Co., Ltd., Yongin-si, KR;

Attorney:

Lewis Roca Rothgerber Christie LLP

Primary Examiner:

Sean P Cullen

Int. Cl.
CPC ...
H01M 50/451 (2021.01); C08F 220/56 (2006.01); C08K 3/22 (2006.01); H01M 10/0525 (2010.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/434 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/489 (2021.01);
U.S. Cl.
CPC ...
H01M 50/451 (2021.01); C08F 220/56 (2013.01); C08K 3/22 (2013.01); H01M 10/0525 (2013.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/434 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/489 (2021.01); C08F 2800/10 (2013.01); C08K 2003/2227 (2013.01); C08K 2201/005 (2013.01); C08K 2201/011 (2013.01); H01M 50/417 (2021.01);
Abstract

The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including the same. The separator includes a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a binder including a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid or (meth)acrylate, and a structural unit derived from (meth)acrylamidosulfonic acid or a salt thereof; first inorganic particles; and second inorganic particles, wherein the first inorganic particles have an average particle diameter of 400 to 600 nm, the average particle diameter of the second inorganic particles is smaller than the average particle diameter of the first inorganic particles.

Find Patent Forward Citations

Lee, Jungyoon. (2025). Separator having coating layer with ternary acrylic copolymer and inorganic particles with different particle diameters, and lithium secondary battery comprising same (U.S. Patent No. 12230837). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12230837

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

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