Fabrication of Anode-Supported Tubular Solid Oxide Fuel Cells by Slip Casting in Combination With Dip Coating Technique

Abstract

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.