Abstract
A new membrane electrode assembly (MEA) assembled with a carbon foam flow field is investigated in comparison to a conventional channel/land flow field. The carbon form flow field is designed to reduce contact resistance and provide more uniform compression. In the new MEA, the carbon paper substrate is eliminated and the entire gas diffusion layer (GDL) consists of only the micro-porous layer (MPL). These MEAs have an improved interfacial contact between the MPL and the catalyst layer, which is optimized for gas transport and water removal. The carbon deposited foam flow field provides effective pathways for water evacuation from the cell so that flooding can be reduced at high current densities, which results in a stable voltage during the polarization measurement, and high current density operation.
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