PHASE SEPARATION TYPE POLYMER ELECTROLYTE FILM, ELECTRODE/PHASE SEPARATION TYPE POLYMER ELECTROLYTE FILM ASSEMBLY EMPLOYING THE SAME, PROCESSES FOR PRODUCING THE SAME, AND FUEL CELL EMPLOYING THE SAME

摘要

A phase separation type polymer electrolyte film which has low degrees of swelling in water and methanol, is excellent in water resistance and methanol resistance, and combines high methanol-barrier properties with low film resistance. The polymer electrolyte film is composed of two phases, i.e., a domain phase comprising an electrolyte polymer (a) and a matrix phase comprising a polymer (b) inhibiting the ingredient (a) from swelling, and is characterized by having a substantially continuous three-dimensional structure which enables proton transfer among the domains of (a).