High-performance low-temperature solid oxide fuel cell with novel BSCF cathode

• Published in: Journal of power sources Vol. 161; no. 1; pp. 123 - 128
• Main Authors: Liu, Q.L., Khor, K.A., Chan, S.H.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 20.10.2006; Elsevier Sequoia
• Subjects: Anode-supported; Applied sciences; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel cells; Gadolina-doped ceria electrolyte; Low-temperature; Novel BSCF cathode; Power density; Solid oxide fuel cell; Power density; Anode-supported; Gadolina-doped ceria electrolyte; Novel BSCF cathode; Solid oxide fuel cell; Low-temperature; High performance; Anode; Cathode; Hydrogen; Gadolinium Cerium Oxides; Open circuit voltage; Cermet; Nickel; Barium Strontium Cobalt Iron Oxides; Low temperature
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2006.03.095

An anode-supported solid oxide fuel cell (SOFC), consisting of a dense 10 μm Gd 0.1Ce 0.9O 1.95 (GDC) electrolyte, a porous Ba 0.5Sr 0.5Co 0.8Fe 0.2O 3− δ (BSCF) cathode and a porous Ni–GDC cermet anode, is successfully assembled and electrochemically characterized. With humidified (3% water vapour) hydrogen as the fuel and air as the oxidant, the cell exhibits open-circuit voltages of 0.903 and 0.984 V when operating at 600 and 500 °C, respectively. The cell produces peak power densities of 1329, 863, 454, 208 and 83 mW cm −2 at 600, 550, 500, 450 and 400 °C, respectively. These results are impressive and demonstrate the potential of BSCF for use as the cathode material in new-generation SOFCs with GDC as the electrolyte. In addition, the sustained performance at temperatures below 600 °C warrants commercial exploitation of this SOFC in stationary and mobile applications.