Development of Novel Cathode-supported Solid Oxide Fuel Cell (SOFC) withLow-cost and Low Environmental Burden

采用双干压法制备的阴极支撑固体氧化物燃料电池的电性能达到了相应文献的水平。研究了低浓度甲烷和氢气对镍基阳极的降解机理。结果表明：(1)退化是由于高水蒸气浓度下镍的二次氧化；(2)退化的阳极在氧气中燃烧，然后在氢气中还原可以得到恢复；(3)初步提出了相应的恢复机理。本研究为评价甲烷燃料SOFC中的降解现象提供了一种简单的方法。

The electrical performances of cathode-supported SOFCs, fabricated in this study by a dual drying pressing method, reached to a high level in comparison with those from corresponding references. The degradation mechanism of Ni-based anode at low concentrations of CH_4 and H_2 was studied. The results show: (1)Degradation is due to the re-oxidation of Ni at high water vapor concentration; (2)Degraded anode could get recovered by burning it in O_2 followed by reduction in H_2, (3)The corresponding mechanism of the recovery was preliminary proposed. This study provides a new technique to evaluate the degradation phenomenon in methane fueled SOFCs using a simple method.