Evaluation of the Effective Reaction Zone at Ni ( NiO ) / Zirconia Anode by Using an Electrode with a Novel Structure
Evaluation of the Effective Reaction Zone at Ni ( NiO ) / Zirconia Anode by Using an Electrode with a Novel Structure
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使用新型结构电极评估镍（NiO）/氧化锆阳极的有效反应区
DOI：
10.1149/1.2050007
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发表时间：
1995
影响因子：
3.9
通讯作者：
Kunio Kato
中科院分区：
文献类型：
--
作者：
N. Nakagawa;H. Sakurai;K. Kondo;T. Morimoto;K. Hatanaka;Kunio Kato
在约1273 K下测量了镍膜厚度和覆盖Ni膜的多孔陶瓷层的厚度对固体氧化物电解质燃料电池的阳极极化的影响。电极阻抗与多孔层的厚度有关，而与Ni膜的厚度无关。直流极化的影响，无论是膜的厚度在相对较高的氢分压。从阻抗图获得的界面电阻Ri由反应电阻R1和由多孔陶瓷层引起的扩散电阻R2组成。R1与P-1/2 H2 O成正比，但不受PH 2的影响。这些结果表明，该速率控制过程是一个活化过程，且发生在距电极/电解液界面1 μm以内的镍膜极薄区域。PH 2和PH 2 O的电流-电压关系的依赖性是类似的从Ni图案电极和Ni-YSZ金属陶瓷电极由其他研究人员。
The effect of nickel film thickness and the thickness of a porous ceramic layer, covering the Ni film, on anode polarization of a solid oxide electrolyte fuel cell was measured at around 1273 K. The electrode impedance was found to be dependent on the thickness of the porous layer but not on that of Ni film. DC polarization was affected by the thickness of neither film at relatively high partial pressure of hydrogen. The interface resistance, R i , obtained from the impedance plot consisted of a reaction resistance, R 1 , and a diffusion resistance, R 2 , caused by the porous ceramic layer. R 1 was proportional to P -1/2 H2O but was not affected by P H2 . These results suggested that the rate-determining process is an activation one and it takes place at very thin zone of the Ni film within 1 μm from the electrode/electrolyte interface. P H2 and P H2O dependencies of the current-voltage relation were similar to that obtained from a Ni patterned electrode and a Ni-YSZ cermet electrode by other researchers.