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Progress in Metal-Supported SOFCs Using Hydrogen and Methane Fuels
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2013
Year
Materials ScienceHydrogen Energy TechnologyElectrical EngineeringChemical EngineeringEngineeringModified AnodesHydrogen UtilizationAtmospheric Plasma SprayingHydrogenMethane FuelsPower DensitiesMicroelectronicsGas Discharge PlasmaElectrochemical CellPlasma ProcessingHydrogen Combustion
Metal-supported SOFCs with power densities above 700 mW/cm 2 at 750 o C were fabricated by atmospheric plasma spraying, which can be readily automated and scaled for larger cell areas and production volumes, with no cell sintering requirement. Porous stainless steel substrates were dip-coated to protect against oxidation and chromium loss, followed by fabrication of the functional layers. Preliminary performance in hydrogen was found to be stable for 200 hours, with longer durability tests ongoing. Cells with modified anodes can achieve performances close to those of standard cells operating in hydrogen, with no evidence of coking in TGA methane experiments. Fabrication of anodes for hydrocarbon fuels and the results of scaling up from button cells to 5cm x 5cm cells are discussed.