Reduction and re-oxidation of anodes for solid oxide fuel cells

被引：153
|
作者：
Malzbender, J [1 ]
Wessel, E [1 ]
Steinbrech, RW [1 ]
机构：
[1] Forschungzentrum Julich GmbH, Inst Mat & Proc Energy Syst, D-52425 Julich, Germany
来源：
SOLID STATE IONICS | 2005年 / 176卷 / 29-30期
关键词：
SOFCs; reduction; re-oxidation; NiO; Ni;
D O I：
10.1016/j.ssi.2005.06.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of reduction and re-oxidation cycles on microstructure and residual stress of anode supported planar solid oxide fuel cells (SOFCs) has been studied. Shrinkage caused by the reduction of NiO to Ni is not reversible. Microstructural scanning electron microscope observations reveal that after re-oxidation, the NiO has a higher porosity and requires a larger volume than in the initial, oxidised state. As a consequence of the anode expansion, tensile stresses develop in the electrolyte, ultimately causing fracture. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：2201 / 2203
页数：3
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