US 12,230,850 B2
Highly reinforced ionomer membranes for high selectivity and high strength
Takeyuki Suzuki, Tokyo (JP); Alexander Agapov, Newark, DE (US); and Mark Edmundson, Newark, DE (US)
Assigned to W. L. Gore & Associates, Inc.; and W. L. Gore & Associates G.K., Tokyo (JP)
Filed by W. L. Gore & Associates, Inc., Newark, DE (US); and W. L. Gore & Associates G.K., Tokyo (JP)
Filed on Jun. 1, 2022, as Appl. No. 17/829,597.
Application 17/829,597 is a continuation of application No. 16/621,193, granted, now 11,380,927, previously published as PCT/US2018/003777, filed on Jun. 15, 2018.
Application 16/621,193 is a continuation of application No. PCT/US2017/003759, filed on Jun. 15, 2017.
Prior Publication US 2022/0293989 A1, Sep. 15, 2022
Int. Cl. H01M 8/1039 (2016.01); H01M 8/10 (2016.01); H01M 8/1004 (2016.01); H01M 8/1023 (2016.01); H01M 8/1053 (2016.01); H01M 8/1062 (2016.01); H01M 8/1067 (2016.01)
CPC H01M 8/1039 (2013.01) [H01M 8/1004 (2013.01); H01M 8/1023 (2013.01); H01M 8/1053 (2013.01); H01M 8/1062 (2013.01); H01M 8/1067 (2013.01); H01M 2008/1095 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A composite membrane, comprising:
a) a microporous polymer structure present in an amount from 13 vol % to 65 vol % based on the total volume of the composite membrane; and
b) an ion exchange material at least partially embedded within the microporous polymer structure and rendering the microporous polymer structure occlusive;
wherein a thickness of the composite membrane is below 17 micrometers while an acid content of the composite membrane is between 1.2 meq/cm3 to 3.5 meq/cm3 wherein the composite membrane has an acid content and a thickness determined at 0% relative humidity.