Proton conductive film, method for producing the same, and fuel cell using same

摘要

An object of the present invention is to solve the problems with conventional polymer electrolyte fuel cells and provide a proton conducting membrane which exhibits an excellent heat resistance and an excellent protonic conductivity and a high dimensional stability even at high temperatures, a method for producing the same and a fuel cell using the same. The proton conducting membrane of the present invention is a proton conducting membrane having particles 1 comprising a metal-oxygen crosslinked structure and the particles 1 have an acid group such as sulfonic acid group incorporated in the surface thereof and form a continuity. The gap 2 between the particles is communicated from the main surface to the opposite surface of the proton conducting membrane to form a proton conducting channel.