A novel single phase cathode material for a proton-conducting SOFC

• Published in: Electrochemistry communications Vol. 11; no. 3; pp. 688 - 690
• Main Authors: Tao, Zetian, Bi, Lei, Yan, Litao, Sun, Wenping, Zhu, Zhiwen, Peng, Ranran, Liu, Wei
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.03.2009; Amsterdam Elsevier; New York, NY
• Subjects: Applied sciences; Co-pressing way; Doped barium cerate; Energy; Energy. Thermal use of fuels; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Fuel cells; Perovskite structure; Proton-conducting SOFCs; Single phase cathode; Single phase cathode; Proton-conducting SOFCs; Doped barium cerate; Co-pressing way; Perovskite structure; Cerium Oxides; Bismuth Oxides; Perovskite type compound; Electrical properties; Cathode; Solid electrolyte; Doped materials; Electrode material; X ray diffraction; Solid oxide fuel cell; Barium Oxides; Quaternary compound; Proton conductivity; Electrochemical impedance spectroscopy
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2009.01.012

A novel single phase BaCe 0.5Bi 0.5O 3 − δ (BCB) was employed as a cathode material for a proton-conducting solid oxide fuel cell (SOFC). The single cell, consisting of a BaZr 0.1Ce 0.7Y 0.2O 3 − δ (BZCY7)-NiO anode substrate, a BZCY7 anode functional layer, a BZCY7 electrolyte membrane and a BCB cathode layer, was assembled and tested from 600 to 700 °C with humidified hydrogen (∼3% H 2O) as the fuel and the static air as the oxidant. An open-circuit potential of 0.96 V and a maximum power density of 321 mW cm −2 were obtained for the single cell. A relatively low interfacial polarization resistance of 0.28Ω cm 2 at 700 °C indicated that the BCB was a promising cathode material for proton-conducting SOFCs.