Dense and microcrack free yttria-stabilized zirconia (YSZ) was deposited onto porous NiO-YSZ anode tubes by dip coating without any vacuum assistance. The anode tubes were prepared by slip casting. Open circuit voltage of 1.05 V was obtained at 800°C⁠, implying that the gas tightness of dip coating YSZ membranes is eligible for solid oxide fuel cell application. A fuel cell of Ni-YSZ/YSZ(20 μm)/La0.7Sr0.3MnO3-YSZ provides maximum power densities of 0.24 W/cm2⁠, 0.46 W/cm2⁠, 0.81 W/cm2⁠, and 1.1 W/cm2 at 650°C⁠, 700°C⁠, 750°C⁠, and 800°C⁠, respectively. The impedance data indicate that the resistivity of the YSZ electrolyte membrane is about 40.5 Ω cm at 800°C⁠. At the same temperature, the electrode polarization resistance accounts for 74.8% of the cell’s total resistance under maximum power density condition.

Issue Section:
Research Papers
Keywords:
casting, dip coating, electrochemical electrodes, electrolytes, lanthanum compounds, nickel compounds, solid oxide fuel cells, strontium compounds, yttrium compounds, zirconium compounds, solid oxide fuel cell, slip casting, dip coating, yttria-stabilized zirconia, electrolyte membranes
Topics:
Anodes, Coating processes, Coatings, Electrodes, Electrolytes, Manufacturing, Membranes, Slip casting (Process), Solid oxide fuel cells
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