Zr doped BaFeO3-δ as a robust electrode for symmetrical solid oxide fuel cells

A BaFe0.9Zr0.1O3-delta (BFZ) is successfully synthesized and its characteristics are investigated. The oxide exhibits high stability and a cubic perovskite structure in a reducing atmosphere. A La0.9Sr0.1Ga0.8Mg0.2O3-delta (LSGM) supported symmetrical solid oxide fuel cell (SOFC) with BFZ electrode demonstrates a maximum power density of 1097 mW cm(-2) using humidified H-2 as the fuel and ambient air as the oxidant at 800 degrees C. And as low as 0.190 Omega cm(2) of polarization resistance of single cell is observed at 650 degrees C. Moreover, the electrode demonstrates high stability in 100 h test, as well as redox stability in both oxidizing and reducing atmospheres. The high electrochemical property and good stability suggest that the BFZ is promising candidate for symmetrical SOFC electrode. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.