POLYMER ELECTROLYTE FUEL CELL

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Durability of a solid polymer fuel cell is improved by improving oxidation resistance and durability of the electrolyte membrane with a low-cost method . A solid polymer fuel cell comprising a membrane electrode assembly wherein a n electrode is joined to each side of a solid polymer electrolyte membrane is characterized in that a phosphate containing at least one metal element selected from rare earth elements, Ti, Fe, Al and Bi is fixed to at least on e of the solid polymer electrolyte membrane and electrodes.