Interactions of a La0.9Sr0.1Ga0.8Mg0.2O3−δ electrolyte with Fe2O3, Co2O3 and NiO anode materials

In this study, the interactions of a Sr- and Mg-doped lanthanum gallate (LSGM with composition La0.9Sr0.1Ga0.8Mg0.2O3−δ) electrolyte with Fe2O3, Co2O3 and NiO as the anode starting materials were investigated. It was found that the order of reactivity of the LSGM with the three oxides was Co2O3>NiO>Fe2O3, and La-containing oxides were detected in these binary powder mixtures after firing. The anode performance was greatly influenced by the interaction. The Fe2O3–LSGM anode, mixed with 40 vol.% LSGM powder and sintered at 1150°C, exhibited the highest initial performance in comparison with NiO–LSGM and Co2O3–LSGM anodes. It seems that Fe2O3 is a possible anode starting material for a LSGM-based solid oxide fuel cell.