| 摘要 |
A membrane electrode assembly for a direct oxidation fuel cell includes a proton-conductive electrolyte membrane and an anode and a cathode sandwiching the electrolyte membrane. The equivalent weight of the proton-conductive substance contained in the catalyst layer of the anode is greater than the equivalent weight of the proton-conductive substance contained in the catalyst layer of the cathode. This invention reduces the performance deterioration caused by repetitive swelling and contraction of the electrolyte contained in the catalyst layer upon changes in operating conditions or upon repetitive start and stop of operation, thereby making it possible to provide a fuel cell with a high output and high performance.
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