Layered perovskite PrBa0.5Sr0.5CoCuO5+δ as a cathode for intermediate-temperature solid oxide fuel cells

Layered perovskite PrBa0.5Sr0.5CoCuO5+δ (PBSCCo) oxide is synthesized by EDTA-citrate complexing method and investigated as a novel cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs). X-ray diffraction results show that PBSCCo is chemical compatible with Gd0.1Ce0.9O1.95 (GDC) electrolyte below 950 °C. The thermal expansion coefficient of PBSCCo is 17.58 × 10−6 K−1 between 30 °C and 900 °C. The maximum electrical conductivity of PBSCCo is 483 S сm−1 at 325 °C. The polarization resistance of PBSCCo cathode on GDC electrolyte is as low as 0.06 Ω cm2 at 800 °C. The maximum power density of the electrolyte-supported single cell with PBSCCo cathode achieves 521 mW cm−2 at 800 °C. Preliminary results indicate that PBSCCo is a potential cathode material for application in IT-SOFCs.