Title:
SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/219304
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 comprising: a porous substrate; a heat-resistant layer disposed on at least one surface of the porous substrate; and an adhesive layer disposed on the heat-resistant layer, wherein: the heat-resistant layer comprises a first binder and inorganic particles, the first binder including polyacrylate, polyacrylic acid, polyacrylonitrile, polyvinyl alcohol, polysulfonic acid, polyacrylamide, polyamide, polyurea, polyurethane, copolymers thereof, or combinations thereof; and the adhesive layer comprises a second binder and a third binder, the second binder including a copolymer containing a first unit derived from a vinyl aromatic monomer, a second unit derived from an alkyl acrylate, and a third unit derived from a phosphonate-based monomer, the third binder including a fluorine-based polymer, the weight ratio of the second binder and the third binder in the adhesive layer being 1:1 to 1:6.
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Inventors:
LEE MINJEONG (KR)
PARK SAM-JIN (KR)
SEO JINWEON (KR)
LEE EONMI (KR)
KO CHANGHONG (KR)
PARK SAM-JIN (KR)
SEO JINWEON (KR)
LEE EONMI (KR)
KO CHANGHONG (KR)
Application Number:
PCT/KR2023/005702
Publication Date:
November 16, 2023
Filing Date:
April 26, 2023
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
H01M50/451; H01M4/525; H01M10/052; H01M10/42; H01M50/446; H01M50/46; H01M50/489
Foreign References:
| KR20210147995A | 2021-12-07 | |||
| KR20200079905A | 2020-07-06 | |||
| KR20130011973A | 2013-01-30 | |||
| KR20140026009A | 2014-03-05 | |||
| KR20210117785A | 2021-09-29 |
Attorney, Agent or Firm:
PANKOREA PATENT AND LAW FIRM (KR)
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