Change of an anode's microstructure morphology during the fuel starvation of an anode-supported solid oxide fuel cell
Change of an anode's microstructure morphology during the fuel starvation of an anode-supported solid oxide fuel cell
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DOI：
10.1016/j.ijhydene.2015.03.143
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发表时间：
2015-06
影响因子：
7.2
通讯作者：
G. Brus;Kotaro Miyoshi;H. Iwai;M. Saito;H. Yoshida
中科院分区：
文献类型：
--
作者：
G. Brus;Kotaro Miyoshi;H. Iwai;M. Saito;H. Yoshida
由于微观结构的变化，RedOx循环是阳极退化的最危险因素之一。本文采用电化学方法研究了燃料饥饿过程引起的氧化还原循环过程中阳极微观结构的演变。发电实验后，阳极微观结构重建使用聚焦离子束和扫描电子显微镜（FIB-SEM）的组合。微观结构的变化进行了量化的参数，如曲折因子，三重相界密度，体积分数，连通性和平均晶粒尺寸。三维微观结构重建表明，燃料饥饿条件可能会导致显着的微观结构形态的变化。
A RedOx cycle is one of the most dangerous factors of anode degradation due to microstructure changes. In this paper, the evolution of anode microstructure during a RedOx cycle caused by a fuel starvation process was studied using electrochemical measurements. After a power generation experiment, the anode microstructure was reconstructed using a combination of focused ion beam and scanning electron microscopy (FIB–SEM). The microstructure changes were quantified for parameters such as the tortuosity factor, tripe phase boundary density, volume fraction, connectivity and average grain size. The three dimensional microstructure reconstruction indicated that the fuel starvation condition might cause significant changes in microstructure morphology.