	US 12,391,810 B2
	Gelled polymer membrane for Li-ion battery
Stephane Bizet, Serquigny (FR); Gregory Schmidt, Pierre-Benite (FR); and Jerome Chauveau, Serquigny (FR)
Assigned to Arkema France, Puteaux (FR)
Appl. No. 17/776,248
Filed by Arkema France, Colombes (FR)
PCT Filed Nov. 10, 2020, PCT No. PCT/FR2020/052050 § 371(c)(1), (2) Date May 12, 2022, PCT Pub. No. WO2021/094681, PCT Pub. Date May 20, 2021.
Claims priority of application No. FR19.12661 (FR), filed on Nov. 13, 2019.
Prior Publication US 2022/0389178 A1, Dec. 8, 2022
Int. Cl. H01M 50/426 (2021.01); C08J 5/18 (2006.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01); H01M 50/449 (2021.01)

CPC C08J 5/18 (2013.01) [H01M 10/0525 (2013.01); H01M 10/44 (2013.01); H01M 50/426 (2021.01); H01M 50/449 (2021.01); C08J 2327/16 (2013.01); C08J 2327/20 (2013.01)]

17 Claims

1. A nonporous fluoropolymer film comprising one or more layers, wherein at least one layer (layer A) consists of a mixture of two fluoropolymers:

a. fluoropolymer A which comprises at least one copolymer of vinylidene fluoride (VDF) and hexafluoropropylene (HFP) having an HFP content of greater than or equal to 3% by weight, and

b. fluoropolymer B which comprises a VDF homopolymer and/or at least one VDF-HFP copolymer, said fluoropolymer B having a weight content of HFP which is at least 3% by weight lower than the weight content of HFP of the polymer A.