Abstract
A direct methanol fuel cell (DMFC) is considered as a prospective power source for portable electronic devices. In this study, effects of vapor-feed on a fuel-storage-type DMFC performance with a hydrocarbon polymer electrolyte membrane are investigated by both anodic and cathodic gas analysis. In the vapor-feed DMFC under low current density, since the anode vapor concentration of CH_3OH is low enough for the anodic reaction, the methanol crossover is lower than in the liquid-feed. However, in the vapor-feed DMFC, the water management of the membrane is important for solving the lack of water.
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