Electrochemical properties of pure Ba0.5Sr0.5Co0.8Fe0.2O3 and Ba0.5Sr0.5Co0.8Fe0.2O3-based composite cathodes for an intermediate temperature solid oxide fuel cell with Sc-doped zirconia solid electrolyte

► We demonstrate the electrochemical performance of a Ba0.5Sr0.5Co0.8Fe0.2O3 + Co3O4 + Ce0.8Sm0.15Nd0.05O2 composite cathode. ► Its polarization resistance on a ScSZ solid electrolyte with a ceria buffer layer is ∼0.048 W cm2 at 700 °C. ► The composite cathode is a viable cathode for IT-SOFCs.