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Proton exchange membrane (PEM) fuel cells with optimized cathode structures can provide high performance at higher temperature (120°C). A “pore-forming” material, ammonium carbonate, applied in the unsupported Pt cathode catalyst layer of a high temperature membrane electrode assembly enhanced the catalyst activity and minimized the mass-transport limitations. The ammonium carbonate amount and Nafion...
Miscible Nafion ( R)/poly(vinylidene fluoride) blend membranes are prepared and characterized PVdF = poly(vinylidene fluoride). The membranes have high miscibility above a 60wt.% Nafion ( R) fraction when both polymers are dissolved in a solvent mixture of N,N'-dimethylacetamide and 2-propanol. Despite the high miscibility, the extremely hydrophobic PVdF component reduces the water...
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