COMPOSITION OF POLYMER ELECTROLYTE FOR DIRECT METHANOL FUEL CELL WITH THE SUPPRESSED METHANOL CROSSOVER

摘要

Provided is a polymer electrolyte composition for a direct methanol fuel cell which is minimized in methanol crossover, is thin and is improved in mechanical properties and hydrogen ion conductivity. The polymer electrolyte composition comprises an ionomer A comprising a perfluorate-based main chain; and 0.01-99.99 wt% of a hydrocarbon-based ionomer B having a crosslinked main chain. Preferably the hydrocarbon-based ionomer B is obtained by crosslinking a mixture of a monomer containing an ionic group, a crosslinking agent, a monomer for controlling mechanical properties and an initiator. Preferably the ionic group of the monomer containing an ionic group is a sulfonic acid group or a carboxylic acid group; and the monomer for controlling mechanical properties is at least one selected from vinyl-based, acrylate-based and methacrylate-based monomers.