US 11,715,839 B2
Integral composite membrane with a continuous ionomer phase
Alexander Agapov, Newark, DE (US); and Takeyuki Suzuki, Tokyo (JP)
Assigned to W. L. Gore & Associates, Inc., Newark, DE (US); and W. L. Gore & Associates G.K., Tokyo (JP)
Appl. No. 17/262,516
Filed by W. L. Gore & Associates, Inc., Newark, DE (US); and W. L. Gore & Associates G.K., Tokyo (JP)
PCT Filed Jul. 27, 2018, PCT No. PCT/US2018/044104
§ 371(c)(1), (2) Date Jan. 22, 2021,
PCT Pub. No. WO2020/023057, PCT Pub. Date Jan. 30, 2020.
Prior Publication US 2021/0296674 A1, Sep. 23, 2021
Int. Cl. H01M 8/1044 (2016.01); C25B 1/04 (2021.01); C25B 13/02 (2006.01); C25B 13/08 (2006.01); H01M 8/0239 (2016.01); H01M 8/0243 (2016.01); H01M 8/0245 (2016.01); H01M 8/1009 (2016.01); H01M 8/1053 (2016.01); H01M 8/1062 (2016.01); H01M 8/18 (2006.01); H01M 8/10 (2016.01)
CPC H01M 8/1044 (2013.01) [C25B 1/04 (2013.01); C25B 13/02 (2013.01); C25B 13/08 (2013.01); H01M 8/0239 (2013.01); H01M 8/0243 (2013.01); H01M 8/0245 (2013.01); H01M 8/1009 (2013.01); H01M 8/1053 (2013.01); H01M 8/1062 (2013.01); H01M 8/188 (2013.01); H01M 2008/1095 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A composite membrane, comprising:
a microporous polymer structure; and
an ion exchange material at least partially embedded within the microporous polymer structure and rendering at least a portion of the microporous polymer structure occlusive,
wherein the ion exchange material forms a continuous ionomer phase within the composite membrane,
wherein the composite membrane includes multiple layers of the ion exchange material provided on top of one another which do not have any internal interface between the layers, and
wherein the composite membrane has a haze which is the ratio of diffuse transmittance to total transmittance of light through the composite membrane and the composite membrane exhibits a change of the haze of 0% or less after being subjected to a blister test procedure.