BSCF Based Nanocomposite Cathodes Fabricated by Ion-impregnating Method for Solid Oxide Fuel Cells

作者：Wei, Fuxiang^*; Jiang, Jiaqiang; Yu, Genxi; Yang, Jinling; Lu, Shenghai

来源：International Journal of Electrochemical Science, 2015, 10(9): 7159-7165.

• BSCF-SDC cathode
• Ion-impregnation
• Impedance spectroscopy
• Solid oxide fuel cell

By steeping nano-particles Sm0.2Ce0.8O1.9 (SDC) in Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) matrix material, low temperature BSCF-SDC nano-composite cathode of SOFC is prepared. The ion impregnation of the SDC phase significantly enhances the electrocatalytic activity of BSCF electrodes in O-2 reduction reaction, and the ion-impregnated BSCF-SDC composite cathodes shows excellent performance. The area specific resistance (ASR) is only 0.214 Omega cm(2) at 600 degrees C for an ion-impregnated BSCF-SDC cathode. The single cell with SDC heated at 800 degrees C has the best electrochemical properties, and the maximum power densities are 290 mWcm(-2), 504 mWcm(-2) and 793 mWcm(-2) at 500 degrees C, 550 degrees C and 600 degrees C, respectively. The results demonstrate that the combination of BSCF mixed conducting structure with high ionic conducting SDC phase is a valid method to improve the electrode performance. The nano-composite cathode prepared by impregnation method has displayed good electrochemistry catalytic activity.

• 出版日期2015-9
• 单位中国矿业大学（北京）