Polymer membrane for a fuel cell comprises an electrolyte and proton-conducting barrier layer having a higher permeability for water than the electrolyte and arranged in the region of one of the membrane outer surfaces

摘要

Polymer membrane (11) comprises an electrolyte and proton-conducting barrier layer (12, 13) having a higher permeability for water than the electrolyte and arranged in the region of one of the membrane outer surfaces (16, 17). Independent claims are also included for the following: (1) membrane-electrode unit for a fuel cell; (2) process for producing a polymer membrane; and (3) fuel cell electrode.