Effect of Temperature on the In-Plane Permeability in the Gas Diffusion Layer of a PEM Fuel Cell
نویسندگان
چکیده
The in-plane permeability is an important property of the gas diffusion layer (GDL) in a Proton Exchange Membrane Fuel Cell. It governs the transport of reactants and water vapor from the channel to the GDL regions under the land of the bipolar plate, and the bulk mass transport in the case of interdigitated flow fields. The current focus in literature has been on studying the effect of porosity on this property. These studies have traditionally been conducted at room temperature. However, typical PEMFCs operate most efficiently between 65 and 90°C. In this study, an ex-situ test setup has been developed to investigate the effect of temperature on the in-plane permeability of the GDL. The in-plane permeability of humid air is measured for system temperatures of 25, 40, 60 and 80°C for samples from Toray Inc., SGL Corp. and Mitsubishi Rayon Corp.
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