Redox stability of La0.2Sr0.7Ti0.9Ni0.1O3-δ (LSTN)-Gd0.2Ce0.8O2-δ (GDC) composite anode

The electrolyte (Sc-stabilized zirconia)-supported cells with LSTN-GDC or LSTN-GDC-Ni anodes exposed to wet H2 show comparable performance (i.e., polarization resistance and power density) to that of cell with conventional Ni-GDC anode. However, during 10 redox cycles (1 h in air + 25 h in H2), they show much better stability with little degradation in Ohmic and polarization resistance values than Ni-GDC anode. The cells with LSTN-containing composite anodes, with or without Ni, exposed to CH4 also show improved performance compared to the cell with Ni-GDC anode.