Ni/Ceria Cermet as Anode of Reduced-Temperature Solid Oxide Fuel Cells
Ni/Ceria Cermet as Anode of Reduced-Temperature Solid Oxide Fuel Cells
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Ni/Ceria 金属陶瓷作为低温固体氧化物燃料电池的阳极
DOI：
10.1149/1.1483867
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发表时间：
2002
影响因子：
3.9
通讯作者：
M. Dokiya
中科院分区：
文献类型：
--
作者：
Shaorong Wang;Tohru Kato;S. Nagata;T. Honda;T. Kaneko;N. Iwashita;M. Dokiya
用交流阻抗法结合直流极化法研究了Ce0.8Sm0.2O1.9/Ni金属陶瓷在Ce0.8Sm0.2O1.9电解质上的阳极特性。实验获得的科尔-科尔图的交流阻抗显示了一个移动与添加直流电压。体电阻和电极反应电阻均随阳极直流电流的增大而增大。体电阻的漂移是由电解质的电子传导解释的。电极反应电阻的增加被认为是离子和外部电流之间的差异的结果，不同于Ni/氧化钇稳定的氧化锆阳极。采用共沉淀法制备阳极前驱体，并将其与电解液共沉淀以改善接触，在70 0 °C以下获得了低于0.1 Ω/cm 2的界面电阻。
Anode characteristics of a Ce 0.8 Sm 0.2 O 1.9 /Ni cermet on the Ce 0.8 Sm 0.2 O 1.9 electrolyte were studied by a three-probe ac impedance method combined with dc polarization, instead of the conventional current-voltage curve measurement. The experimentally obtained Cole-Cole plots of ac impedance showed a shift with added dc voltage. Both bulk resistance and electrode reaction resistance increased with increasing anodic dc current. The shift of bulk resistance is explained by the electronic conduction of the electrolyte. The increase of electrode reaction resistance is thought to be a result of discrepancy between the ionic and the external current, differing from Ni/yttria-stabilized zirconia anode. An interface resistance lower than 0.1 Ω/cm 2 was obtained below 700°C by using a coprecipitation method to prepare the anode precursor and coliring it with the electrolyte to improve the contact.