Metal-supported solid oxide fuel cell membranes for rapid thermal cycling

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• 作者：Matus ; Yuriy B. ; De Jonghe ; Lutgard C. ; Jacobson ; Craig P. ; Visco ; Steven J.
• 关键词：Thin film SOFC ; Metal support electrodes ; Thermal cycling ; Fast response
• 刊名：Solid State Ionics
• 出版年：2005
• 期刊代码：96_01672738
• 类别：ch
• 出版时间：February 14, 2005
• 卷：176
• 期：5-6
• 页码：443-449
• 文件大小：532 K

摘要

Solid oxide fuel cell (SOFC) membranes were developed in which zirconia-based electrolyte thin films were supported by a porous composite metal/ceramic current collector and were subjected to rapid thermal cycling between 475 and 1075 K (200 and 800 脗脗C). The effects of this cycling on membrane performance were evaluated. The membranes, not yet optimized for performance, showed a peak power density of 350 mW/cmp>2p> at 1175 K (900 脗脗C) in laboratory-sized SOFCs, while rapid thermal cycling had only a marginal effect on cell performance. This resistance to cycling degradation is attributed to the close matching of thermal expansion coefficient of the porous cermet supporting current collector (PCC) with that of the zirconia electrolyte.