Title:
SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2020/138628
Kind Code:
A1
Abstract:
The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery comprising same. The separator comprises a porous substrate and a coating layer placed on at least one surface of the porous substrate, wherein the coating layer includes: a heat-resistant binder comprising a (meth)acrylic copolymer which bears 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; an adhesive binder having a core-shell structure; and inorganic particles, wherein the average particle diameter of the adhesive binder is 0.2 to 1.0㎛, and the average particle diameter of the inorganic particles is 0.2 to 1.0㎛.
Inventors:
KIM YONGKYOUNG (KR)
KIM GAIN (KR)
LEE JUNGYOON (KR)
CHOI YEONJOO (KR)
KIM YANGSEOB (KR)
KIM GAIN (KR)
LEE JUNGYOON (KR)
CHOI YEONJOO (KR)
KIM YANGSEOB (KR)
Application Number:
PCT/KR2019/010130
Publication Date:
July 02, 2020
Filing Date:
August 09, 2019
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
C08K3/013; C08L25/14; C08L33/02; C08L33/08; C08L33/14; C08L33/26; H01M10/052; H01M10/42; H01M50/443
Foreign References:
| KR20110104791A | 2011-09-23 | |||
| JP2017050149A | 2017-03-09 | |||
| KR20170129645A | 2017-11-27 | |||
| KR20160109669A | 2016-09-21 | |||
| KR20160061165A | 2016-05-31 |
Other References:
See also references of EP 3905381A4
Attorney, Agent or Firm:
PANKOREA PATENT AND LAW FIRM (KR)
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