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.
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