Investigation on SmBa0.5Sr0.5Co1.5Fe0.5O5+δ double perovskite as an oxygen electrode for reversible solid oxide fuel cell

The conventional oxygen electrode degrades when operated in reversible solid oxide fuel cell (RSOFC) mode. To address this issue, double perovskites have been explored as promising cathode electrodes in RSOFC with proton conducting electrolyte as the electrolyte. In the present study, SmBa0.5Sr0.5Co1.5Fe0.5O5+δ (SBSCF) double perovskite is explored as the oxygen electrode using YSZ as the electrolyte. The SBSCF has been successfully synthesized using a simple and cost-effective solution combustion technique as the oxygen electrode for RSOFC. The structural, morphological and electrical conductivity of SBSCF powder and the electrochemical performance of SOFC containing SBSCF as cathode material are discussed. The performance of the cell in the electrolyzer mode is also discussed.