Interfacial effects in monolithic solid oxide fuel cells

The interfacial resistance of thin three-layer ceramic solid oxide fuel cell composites was studied at 1000{degrees} using ac impedance techniques. The anode interfacial resistance was found to increase dramatically when the H{sub 2}O content decreased below 0.03 atm in a H{sub 2}/H{sub 2}O fuel system. Increases in the anode interfacial resistance were also observed in the presence of H{sub 2}S. Significant decreases in the anode interfacial resistance were accomplished by tailoring the electrode's microstructure. 4 refs., 4 figs.