Sr2FeNi0.2Cu0.2Co0.1Mo0.5O6 as potential symmetrical electrode for intermediate-temperature solid-oxide fuel cells

In this study, Sr2FeNi0.2Cu0.2Co0.1Mo0.5O6 (SFNCCM) perovskite oxide is prepared by the solid state reaction method, characterized and tested as symmetrical electrode material for solid-oxide fuel cells. X-ray diffraction results show that SFNCCM has a cubic structure and can maintain good structural stability, and at 1100°C is chemically compatible with Ce0.9Gd0.1O1.95 electrolyte. The SFNCCM conductivity reached a maximum of 21.7 S cm−1 at 650°C. The average thermal expansion coefficient during 30-1000°C is 18.3 × 10−6 K−1 for SFNCCM. The area specific resistance at 800°C reached 0.046 Ω cm2. The maximum power density of SFNCCM as a symmetric electrode at 800°C is 610 mW cm−2. The precipitation of bimetallic alloy under reduction conditions with good electrocatalytic activity and output performance indicate SFNCCM can be a good alternative symmetrical electrode for IT-SOFC.