Operational Inhomogeneities in La0.9Sr0.1Ga0.8Mg0.2O3-δ Electrolytes and La0.8Sr0.2Cr0.82Ru0.18O3-δ-Ce0.9Gd0.1O2-δ Composite Anodes for Solid Oxide Fuel Cells

被引：4
|
作者：
Liao, Y. [1 ]
Bierschenk, D. M. [1 ]
Barnett, S. A. [1 ]
Marks, L. D. [1 ]
机构：
[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
来源：
FUEL CELLS | 2011年 / 11卷 / 05期
关键词：
Catalyst; Chromite Anode; Degradation; Interface; LSGM Electrolyte; Microstructure; Nano; Ruthenium; SOFC; TEM; SOFC CATHODE; ZIRCONIA;
D O I：
10.1002/fuce.201000164
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrolyte/anode interface in solid oxide fuel cells with La0.9Sr0.1Ga0.8Mg0.2O3-delta electrolytes and composite anodes containing La0.8Sr0.2Cr0.82Ru0.18O3-delta and Ce0.9Gd0.1O2-delta (GDC) was studied using transmission electron microscope Z-contrast imaging and energy dispersive X-ray spectroscopy. The anode/electrolyte interface of an operated cell had numerous defective regions in the electrolyte, immediately adjacent to anode GDC particles. These areas had a different chemical composition than other electrolyte regions and were crystallographically inhomogeneous. These regions were not observed in a cell reduced in hydrogen that was not operated, suggesting that they were the result of combined electrical and chemical potential gradients present during cell operation. Ru nanoparticles were observed on the chromite surfaces of the operated.
引用
收藏
页码：635 / 641
页数：7
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