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

✍ Scribed by Ze Liu; Ling-zhi Cheng; Min-Fang Han

• Book ID: 104026151
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 887 KB
• Volume: 196
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2010.05.051

✦ Synopsis

A-site cation-deficient Ba 1-x Co 0.7 Fe 0.2 Nb 0.1 O 3-ı (B 1-x CFN, 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 B 1-x CFN and gadolinia doped ceria (GDC) is observed at different temperature, and no second phase is detected under 1050 • C. The increasing in A-site cation deficiency results in a steady decrease in cathode polarization resistance. Among the various B 1-x CFN oxides test, GDC based anode supported cells with B 0.9 CFN cathode possess the smallest interfacial polarization resistance (R p ). The R p is as low as 0.283 and 0.046 cm 2 at 500 and 600 • C, respectively. The anode supported cell with B 0.9 CFN provides maximum power densities of 1062 and 1139 mW cm -2 at 600 and 650 • C, respectively. The results suggest that B 0.9 CFN is a great potential cathode material for IT-SOFCs.