| 摘要 |
A proton exchange membrane fuel cell stack comprises a plurality of stacked unit cells, the unit cells each including: a membrane electrode assembly; an anode side-conductive gas diffusion layer and an anode side-fuel gas flow field to feed a fuel gas to an anode of the membrane electrode assembly; and a cathode side-conductive gas diffusion layer and a cathode side-oxidant gas flow field to feed an oxidant gas to a cathode of the membrane electrode assembly; and a bipolar plate for separating between the anode side-fuel flow field and the cathode side-oxidant gas flow field. Then, the fuel gas flow field and the oxidant gas flow field are constituted by respective porous media flow fields each which is a conductive porous medium, and the porous media flow field for the oxidant gas flow field is configured so that liquid water is supplied mixedly together with the oxidant gas thereto.
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