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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 11312871 B1

PDFFull Text
Date of Patent:
Apr. 26, 2022

Filed:

May. 15, 2018

Separator for secondary battery and lithium secondary battery comprising same

Applicant:

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

Inventors:

Changhong Ko, Yongin-si, KR;

Dongwan Seo, Yongin-si, KR;

Hyeonsun Choi, Yongin-si, KR;

Ickkyu Choi, Yongin-si, KR;

Jungjoon Park, Yongin-si, KR;

Jinkyu Park, Yongin-si, KR;

Sam-Jin Park, Yongin-si, KR;

Yangseob Kim, Yongin-si, KR;

Assignee:

SAMSUNG SDI CO., LTD., Yongin-si, KR;

Attorney:

Lee IP Law, P.C.

Primary Examiner:

Bethany L Martin

Assistant Examiner:

Kourtney R S Carlson

Int. Cl.
CPC ...
H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/42 (2021.01); H01M 50/417 (2021.01); H01M 10/0525 (2010.01); C09D 7/61 (2018.01); C08J 7/04 (2020.01); H01M 50/44 (2021.01); H01M 50/403 (2021.01); H01M 50/411 (2021.01); H01M 50/429 (2021.01); C08J 7/043 (2020.01); C08K 3/22 (2006.01); C09D 5/18 (2006.01); C09D 133/20 (2006.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/052 (2010.01); H01M 50/46 (2021.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
C09D 7/61 (2018.01); C08J 7/043 (2020.01); C08J 7/0427 (2020.01); C08K 3/22 (2013.01); C09D 5/18 (2013.01); C09D 133/20 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/623 (2013.01); H01M 4/624 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 50/403 (2021.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/4295 (2021.01); H01M 50/44 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); C08J 2323/06 (2013.01); C08J 2433/20 (2013.01); C08K 2003/2227 (2013.01); H01M 10/052 (2013.01); H01M 50/461 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01);
Abstract

The present invention relates to a separator for a secondary battery and a lithium secondary battery including the separator, the separator including: a porous substrate and a heat-resistant layer disposed on at least one surface of the porous substrate, wherein the heat-resistant layer includes an acrylic heat-resistant binder, an adhering binder, and a filler, the acrylic heat-resistant binder including a structural unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing structural unit, and a sulfonate group-containing structural unit, the adhering binder includes a structural unit including a structural unit including hydroxyl group, a structural unit including an acetate group, and a structural unit including an alkali metal.

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