Membrane - electrode assembly, a manufacturing method and a solid polymer fuel cell using the same

An electrode assembly, membrane joining the proton conducting membrane and gas diffusion electrode - - sided film formed by joining the gas diffusion electrode of the proton conductive membrane electrode junction is formed by sol-gel reaction metal - which is characterized by containing a three-dimensional crosslinked structure consisting of oxygen binding, membrane functions stably even in a high addition a high temperature heat resistance and chemical resistance - electrode assembly, further, the gas diffusion electrode the film, wherein the noble metal catalyst is previously carried on the surface - electrode assembly, or the membrane - electrode junction, in addition to three-dimensional crosslinked structure, further carrying a precious metal catalyst the above film is characterized by containing the carbon particles - electrode assembly, a process for their preparation, and a polymer electrolyte fuel cell or direct methanol fuel which is adapted to correspond to the high temperature operation by using this The battery is provided.