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The effect of Al doping on Ni- YSZ anode sintering in metal-supported solid oxide fuel cell ( MS- SOFC) was studied in the current work.The electrical conductivity of the Al-doped anode was found to increase considerably. Such result may be attributed to the inhibited sintering of insulating YSZ caused by the segragation of Al2O3 at grain boundaries. It was found that the addition of Al to the anode accounts for a finer grained YSZ matrix, thus coating the conducting Ni grains to a lesser extent. 5 wt% Al-doped NiO used for Ni- YSZ anode material gave the finest microstucture and the highest electrical conductivity at room temperature although it showed the lowest bulk density. Overall, Al-doped Ni- YSZ anode material was found to be a suitable material for the anode in MS- SOFC produced by cosintering. [ABSTRACT FROM AUTHOR]

We show that multilayer green tapes constituted from sandwiched layers of NiO-zirconia anode and cubic zirconia electrolyte can be sintered below 1000°C in a few seconds under the influence of a DC electric field. The sintering yields a dense electrolyte layer with minor closed porosity, and an anode layer with open porosity, and, most importantly, a multilayer that is largely devoid of defects and delamination. [ABSTRACT FROM AUTHOR]