US 11,749,811 B2
Ionically conductive asymmetric composite membrane for electrochemical energy system applications
Chunqing Liu, Arlington Heights, IL (US); Xueliang Dong, Schaumburg, IL (US); Chaoyi Ba, Schaumburg, IL (US); and Stuart R. Miller, Arlington Heights, IL (US)
Assigned to UOP LLC, Des Plaines, IL (US)
Filed by UOP LLC, Des Plaines, IL (US)
Filed on Jul. 29, 2021, as Appl. No. 17/388,950.
Claims priority of provisional application 63/165,777, filed on Mar. 25, 2021.
Prior Publication US 2022/0311017 A1, Sep. 29, 2022
Int. Cl. H01M 8/02 (2016.01); H01M 8/18 (2006.01)
CPC H01M 8/02 (2013.01) [H01M 8/188 (2013.01)] 20 Claims
 
1. An ionically conductive asymmetric composite membrane comprising:
a microporous substrate membrane; and
an asymmetric hydrophilic ionomeric polymer coating layer on a surface of the microporous substrate layer, the coating layer made of a hydrophilic ionomeric polymer, the coating layer comprising;
a porous layer having a first surface and a second surface, the first surface of the porous layer on the surface of the microporous substrate layer; and
a nonporous layer on the second surface of the porous layer;
wherein the microporous substrate membrane is made from a polymer different from the hydrophilic ionomeric polymer.