• Title/Summary/Keyword: Anode-supper

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Mechanical and Electrical Performance of Anode-Supported Solid Oxide Fuel Cells during Thermal Cyclic Operation (열 사이클에 따른 고체산화물 연료전지의 기계적 및 전기적 특성)

  • Yang, Su-Yong;Park, Jae-Keun;Lee, Tae-Hee;Yu, Jung-Dae;Yoo, Young-Sung;Park, Jin-Woo
    • Journal of the Korean Ceramic Society
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    • v.43 no.12 s.295
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    • pp.775-780
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    • 2006
  • Mechanical and electrical performance of anode-supported SOFC single cells were analyzed after thermal cyclic operation. The experiments of thermal cyclic cell-operation were carried out four times and performance of each cell was measured at different temperatures of 650, 700, and $750^{\circ}C$, respectively. As increasing the number of thermal cycle test, single cells showed poor I-V characteristics and lower 4-point bending strength. The anode polarization was also measured by AC-impedance analysis. The observation of the microstructure of the anodes in single cells proved that the average particle size of Ni decreased and the porosity of anode increased. It is thought that the thermal cycle caused the degradation of performance of single cells by reducing the density of three-phase boundary region.