Chemical bulk diffusion coefficient of Sm0.5Sr0.5CoO3−δ cathode for solid oxide fuel cells

To improve the cathode performance, the active ionic-conductive Ce0.8Sm0.2O1.9 (SDC) nanoparticles deposit on a porous SSC cathode surface by infiltration method. The enhancement in electrochemical performances is ascribed to the creation of electrolyte/cathode phase boundaries, which considerably increases the electrochemical sites for oxygen reduction reaction. In this work, the 0.2 M SDC-infiltrated SSC reveals the maximum peak power density of 489 mW cm−2 at operating temperature of 700 °C with a thin film SDC electrolyte (30 μm), a Ni + SDC anode (1 mm) and a SDC-infiltrated SSC cathode (20 μm).