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Erschienen in:
2011 | OriginalPaper | Buchkapitel
6 Materials, Proton Conductivity and Electrocatalysis in High-Temperature PEM Fuel Cells
verfasst von : Maria K. Daletou, Joannis Kallitsis, Stylianos G. Neophytides
Erschienen in: Interfacial Phenomena in Electrocatalysis
Verlag: Springer New York
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Fuel cells (FCs) are interesting alternatives to existing power conversion systems since they combine high efficiency with the usage of renewable fuels. Fuel cells can generate power from a fraction of a watt to hundreds of kilowatts and can be used in automotive, stationary or portable applications.1,2,3,4,5,6 A FC is an electrochemical device that converts in a continuous manner the free energy of a chemical reaction into electrical energy (via an electrical current). This galvanic cell consists of an electrolyte (liquid or solid) sandwiched between two porous electrodes. In order to reach desirable amounts of energy power, single cell assemblies can be mechanically compressed across electrically conductive separators to fabricate stacks.