Patent ID: 8642228

Claim:
A polymer electrolyte membrane, comprising: a porous polymer matrix; and a polymer coating that conducts ions arranged on the outer faces of single fibers and inside pores of the porous polymer matrix, wherein the polymer coating is obtained by polymerizing an ion conducting polymeric compound and a cross-linking agent, wherein the ion conducting polymeric compound comprises at least one of an acrylic resin having an acidic functional group at its terminal, alkylamine, and a vinyl monomer having a basic functional group at its terminal, wherein the acrylic resin having an acidic functional group is at least one of phosphoric monoacrylate and phosphoric diacrylate, wherein the alkylamine is at least one of acrylic acid 2-(tert-butyl-methyl-amino)-ethyl ester, N-tert-butyldiethanolamine, and N-(1-cyanocyclohexyl)-N-methylbutyramide, and wherein the vinyl monomer having a basic functional group at its terminal is at least one of vinylpyrrolidone and 1-vinyl imidazole.