Development of La-Doped Ni-SDC Anode for High Performance IT-SOFC of Ni-SDC/LSGM/SSC

Sr and Mg co-doped lanthanum gallate electrolyte (LSGM) shows high oxide ion conductivity at temperatures of 650-800 degrees C. However, LSGM has rather high chemical reactivity with anode materials; reaction compounds at the anode/electrolyte would lead to the degradation of the SOFC performance. In order to develop the optimum cermet anode for LSGM, La and Sm co-doped ceria (SLDC) was synthesized and investigated in connection with reactivity between SLDC and LSGM. The NiO-SLDC composite particles synthesized by spray pyrolysis were applied for cermet anodes in order to prevent the anode/electrolyte interface from undesirable interfacial reaction. The power density of the cells with Ni-SLDC anode was found to be higher than that with Ni-SDC anode. Current interruption measurements revealed that La addition to SDC has an effect on the decrease in ohmic loss.