Performance of XSCoF (X = Ba, La and Sm) and LSCrX′ (X′ = Mn, Fe and Al) perovskite-structure materials on LSGM electrolyte for IT-SOFC

X 0.5Sr 0.5Co 0.8Fe 0.2O 3− δ (X = Ba, La and Sm) and L a 0.75 S r 0.25 C r 0.5 X ′ 0.5 O 3 − δ (X′ = Mn, Fe and Al) mixed ionic–electronic conducting perovskite-based oxides have been tested as SOFC electrode materials on La 0.9Sr 0.1Ga 0.8Mg 0.2O 2.85 (LSGM) electrolytes under different atmospheres (air, oxygen, argon and dry and wet 5% H 2/Ar) and the area-specific resistances (ASR) were compared. Ba 0.5Sr 0.5Co 0.8Fe 0.2O 3− δ (BSCoF) possesses the lowest ASR values in air (0.04 Ω cm 2 at 1073 K) whilst La 0.75Sr 0.25Cr 0.5Mn 0.5O 3− δ (LSCrM) possesses the lowest ASR values in wet 5% H 2/Ar (0.28 Ω cm 2 at 1073 K). In addition, fuel cell tests were carried out using wet 5% H 2/Ar as fuel and air as oxidant. The maximum power density (∼123 mW cm −2) at 1073 K was reached with the electrolyte-supported system BSCoF/LSGM/LSCrM (∼1.5 mm electrolyte thickness). Furthermore, LSCrX′ materials were used simultaneously as cathode and anode in fuel cell tests and the symmetric system LSCrM/LSGM/LSCrM (∼1.5 mm electrolyte thickness) reached a maximum power density of ∼54 mW cm −2 at 1073 K.