Abstract
One of the chief difficulties associated with low temperature (<100°C) fuel cells is water management. Specifically, nucleation of liquid water droplets in the electrodes (i.e., flooding) causes a drop in power output as reactants are prevented from arriving at the electrodes. Here, we describe first attempts at a hybrid polymer fuel cell that prevents flooding. A proton exchange membrane and an alkaline exchange membrane are placed on opposite sides of a porous, water-soaked layer. Water formed in the porous layer is shunted to the exterior of the fuel cell. Though the design is promising, preliminary attempts have shown that the electrolytic resistance is too high for practical use.
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