21015 固体高分子形燃料電池向けガス拡散流路の検討(流体工学(2),一般講演,学術講演)

抄録

High power density enhances polymer electrolyte fuel cell with widely varied applications. Overvlotage reduction at high current density operation is required to increase power density. Our investigation focused on the refinement of the reactant gas flow field at the bipolar plate in order to reduce the over potential. Applying a porous material to the reactant gas flow field is one possible method. Expected advantages of a porous material flow field are an increase in reactant gas diffusivity from the homogeneous pore structure. To reduce the overvoltage from mass transport, a study was carried out to evaluate the feasibility of a porous material as a reactant gas flow field. Two different porous materials were examined. The porous material that has a binary pore size distribution demonstrated superior performance.