Study on degradation of solid oxide fuel cell anode by using pure nickel electrode
Study on degradation of solid oxide fuel cell anode by using pure nickel electrode
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DOI：
10.1016/j.jpowsour.2011.06.069
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发表时间：
2011-10
影响因子：
9.2
通讯作者：
Z. Jiao;N. Shikazono;N. Kasagi
中科院分区：
文献类型：
--
作者：
Z. Jiao;N. Shikazono;N. Kasagi
通过在YSZ颗粒上烧结纯Ni阳极，研究了Ni与YSZ在固体氧化物燃料电池阳极中的相互作用以及玻璃封接对阳极性能的影响。研究了在不同湿度下，Ni-YSZ界面在氢气中100h恒流极化过程中的演化规律。利用电化学阻抗谱分析了阳极的电化学特性随时间的变化。用扫描电子显微镜对界面微观结构变化进行了表征。研究了主体气体湿度、气体密封材料和镍粗化对阳极耐久性的影响。认为纯镍阳极的退化是由硅沉积、YSZ界面形态变化和镍粗化三种机制相互竞争决定的。
In this study, the interactions between Ni and YSZ in solid oxide fuel cell anode and the influence of glass seal to anode performances have been investigated by pure Ni anode sintered on YSZ pellet. The evolution of Ni–YSZ interface in 100h galvanostatic polarization in hydrogen is studied with different humidities in hydrogen. Electrochemical impedance spectroscopy was applied to analyze the time variation of the anode electrochemical characteristics. The interface microstructural changes were characterized by scanning electron microscopy. The influence of bulk gas humidity, gas-sealing material and Ni coarsening on anode durability was studied. The degradation of pure Ni anode is considered to be determined by the competition among the mechanisms of silicon deposition, YSZ interface morphological change and Ni coarsening.