A-site deficient Ba1-xCo0.7Fe0.2Ni0.1O3-delta cathode for intermediate temperature SOFC

作者：Liu, Ze; Cheng, Ling-zhi; Han, Min-Fang^*

来源：Journal of Power Sources, 2011, 196(2): 868-871.

DOI：10.1016/j.jpowsour.2010.05.051

• Solid oxide fuel cell
• Ba1-xCo0.7Fe0.2Ni0.1O3-delta
• Cathode
• A-site deficient

A-site cation-deficient Ba1-xCo0.7Fe0.2Nb0.1O3-delta (B1-xCFN, x = 0.00-0.15) oxides are synthesized and evaluated as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). The reactivity between B1-xCFN and gadolinia doped ceria (GDC) is observed at different temperature, and no second phase is detected under 1050 degrees C. The increasing in A-site cation deficiency results in a steady decrease in cathode polarization resistance. Among the various B1-xCFN oxides test, GDC based anode supported cells with B0.9CFN cathode possess the smallest interfacial polarization resistance (R-p). The R-p is as low as 0.283 and 0.046 Omega cm(2) at 500 and 600 degrees C, respectively. The anode supported cell with B0.9CFN provides maximum power densities of 1062 and 1139 mW cm(-2) at 600 and 650 degrees C, respectively. The results suggest that B0.9CFN is a great potential cathode material for IT-SOFCs.

• 出版日期2011-1-15
• 单位中国矿业大学（北京）