Palladium Deposition On Proton Exchange Membranes


The performance of direct methanol fuel cells (DMFC) is still not satisfactory due to high methanol crossover despite considerable efforts to develop new membranes that are impermeable to methanol. Pd-coated composite membranes are fabricated by spraying palladium onto the Nafion® 117 membrane surfaces under nitrogen pressure. Complete membrane electrode assemblies are made by screen-printing and tested for methanol crossover, membrane resistance, and performance. Methanol crossover is reduced by 35% with a Pd-coated Nafion 117 membrane compared to an un-coated Nafion 117 membrane, but the conductivity has not been changed due to Pd's nature of being a pseudo-proton conductor. The cell performance is increased by 30 mv at 100 mA/sq cm. The results show promising application of Pd-deposited proton exchange membranes in DMFC. This is an abstract of a paper presented at the 230th ACS National Meeting (Washington, DC 8/28/2005-9/1/2005).

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ACS National Meeting Book of Abstracts



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Article; Proceedings Paper

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33745398370 (Scopus)

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