Nano-structured Sm(0.5)Sr(0.5)CoO(3-delta) electrodes for intermediate-temperature SOFCs with zirconia electrolytes

作者：Zhang Han; Zhao Fei; Chen Fanglin; Xia Changrong^*

来源：Solid State Ionics, 2011, 192(1): 591-594.

DOI：10.1016/j.ssi.2010.05.024

• SOFC
• Nano-sized particle
• Ion-impregnation
• Cobaltite
• Scandia-stabilized zirconia
• Doped ceria

A nano-structured Sm(0.5)Sr(0.5)CoO(3) (- delta) (SSC) cathode is fabricated by an ion-impregnation method for intermediate-temperature SOFCs based on zirconia electrolytes. X-ray diffraction analysis shows that perovskite SSC is formed when the impregnated nitrates are fired at 800 degrees C for 1 h. Scanning electron microscopy reveals that the SSC particles are nano-structured. The effect of the electrode thickness, the amount of SSC loading, and the firing process on the interfacial polarization resistance are investigated using symmetrical cells. Anode-supported cells with the nano-structured cathode show an interfacial polarization resistance of only 029 Omega cm(2) at 600 degrees C and produce a peak power density of 437 mW/cm(2) at 600 degrees C with humidified hydrogen as the fuel. The high cell performance indicates that SSC nanoparticle impregnated samaria-doped ceria electrodes are promising for intermediate-temperature SOFCs.

• 出版日期2011-6-16
• 单位中国科学技术大学