	US 12,255,350 B2
	Composition for coating separator, method for manufacturing separator by using same, separator, and lithium battery employing same
Hana Kim, Yongin-si (KR); Byungmin Lee, Yongin-si (KR); and Minho Cho, Yongin-si (KR)
Assigned to SAMSUNG SDI CO., LTD., Yongin-si (KR)
Appl. No. 18/013,583
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
PCT Filed Feb. 22, 2022, PCT No. PCT/KR2022/002587 § 371(c)(1), (2) Date Feb. 8, 2023, PCT Pub. No. WO2022/186537, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 10-2021-0028899 (KR), filed on Mar. 4, 2021.
Prior Publication US 2024/0243434 A1, Jul. 18, 2024
Int. Cl. H01M 50/446 (2021.01); H01M 50/403 (2021.01); H01M 50/42 (2021.01); H01M 50/443 (2021.01)

CPC H01M 50/446 (2021.01) [H01M 50/403 (2021.01); H01M 50/42 (2021.01); H01M 50/443 (2021.01)]

16 Claims

1. A composition for coating a separator, the composition comprising:

a binder including an aqueous cross-linking reactive polyacrylamide copolymer;

inorganic particles; and

water,

wherein the polyacrylamide copolymer includes at least two cross-linking reactive groups that are cross-linkable with each other,

wherein the cross-linking reactive groups include at least one first functional group selected from a carboxyl group, an amine group, and an isocyanate group; and at least one second functional group selected from a hydroxyl group, an epoxy group, and an oxazoline group, and

wherein an equivalent ratio of the first functional group and the second functional group is in a range of about 30:70 to about 70:30.