Studies of material interaction after long-term stack operationx

被引：47

作者：

Menzler, N. H. ^{[1
]}

Batfalsky, P. ^{[1
]}

Blum, L. ^{[1
]}

Bram, M. ^{[1
]}

Gross, S. M. ^{[1
]}

Haanappel, V. A. C. ^{[1
]}

Malzbender, J. ^{[1
]}

Shemet, V. ^{[1
]}

Steinbrech, R. W. ^{[1
]}

Vinke, I. ^{[1
]}

机构：

[1] Forschungszentrum Julich, DE-52425 Julich, Germany

来源：

FUEL CELLS | 2007年 / 7卷 / 05期

关键词：

Cr poisoning; degradation; sealants; SOFC; stack test;

D O I：

10.1002/fuce.200700001

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Forschungszentrum Julich is routinely operating solid oxide fuel cells (SOFCs) in stacks of planar design. Anode-supported cells are used in combination with ferritic steel interconnects as standard components. The stacks are typically sealed with glass-ceramics. In order to examine the long-term interaction between the materials comprising these components, and the contact and protection layers, SOFC stacks with operation times of more than 6,000 h at 800 degrees C have been disassembled and microstructurally examined. The stack disassembling and examination procedures are outlined and results from optical and scanning electron microscopy are presented. Two interaction observations that are considered to affect stack performance are addressed in detail. The effects refer to the reaction of the glass-ceramic sealant with the ferritic steel interconnect and to Cr deposition at the cathode/electrolyte interface. Measures and strategies to diminish and/or to prevent unwanted long-term material interactions are discussed.

引用

页码：356 / 363

页数：8

共 16 条

[1] Interaction between chromia forming alloy interconnects and air electrode of solid oxide fuel cells [J].