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Operating a direct methanol fuel cell (DMFC) with ultra-low fuel stoichiometry is desirable to build a compact portable power system. Through 3D computational modeling with statistical analysis, severe non-uniformity of fuel concentration leading to high methanol crossover in the inlet region and poor fuel supply in the outlet region is predicted under ultra-low fuel stoichiometry condition, which...
A three-dimensional (3D), two-phase, isothermal model of direct methanol fuel cells (DMFCs) was employed to investigate effects of electron transport through the backing layer and the land in bipolar plates. It was found that the electronic resistance of the backing layer, affected by backing layer electronic conductivity, backing layer thickness and flow channel width, played a relatively important...
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