Polymer electrolyte composition for direct methanol fuel cell with suppressed methanol crossover

摘要

The present invention is directed to a polymer electrolyte composition for a direct methanol fuel cell which comprises a perfluorinated ionomer (A) and a crosslinked hydrocarbon-based ionomer (B). In some embodiments, the crosslinked hydrocarbon-based ionomer (B) can be obtained by crosslinking a mixture of a monomer containing ionic groups b₁, a crosslinking agent b₂, a monomer for controlling mechanical properties b₃ and an initiator b₄. The polymer electrolyte composition can minimize methanol crossover, exhibit improved proton conductivity and exhibit excellent mechanical properties.