Development and evaluation of a 3-cell stack of metal-based solid oxide fuel cells fabricated via a sinter-joining method for auxiliary power unit applications

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Recently, metal-based solid oxide fuel cells (SOFCs) receive much attention for potential application in auxiliary power units (APUs). In this study, a sinter-joining method with a silver bonding layer is proposed. This method enables the fabrication of metal-based SOFCs by joining metal plates and conventional ceramic cells using a silver bonding layer. This sinter-joining method has the advantage of full-sintering of the cathode at 1100 degrees C, which facilitates a lower area specific resistance (ASR) of the cathode. Furthermore, the entire manufacturing process is conducted under air atmosphere. A 5 x 5 cm(2) metal-based cell is successfully fabricated by the sinter-joining method, and a maximum power density of 433 mW cm(-2) and a low polarization resistance of 0.12 Omega cm(2) is obtained. Using the metal-based cells, a prototype 3-cell SOFC stack is developed considering mechanical robustness and diesel reformate fuel supply for future APU system applications. The stack exhibits a maximum power density of 100 mW cm(-2) and is tested for 120 h. After the test, a post-mortem analysis is conducted, and the causes of the low electrochemical performance and degradation issue are investigated. In the conclusion, the sinter-joining method is considered as one of the methods for metal-based SOFCs. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-08
Language
English
Article Type
Article
Keywords

CURRENT COLLECTOR; SUPPORTED SOFCS; PERFORMANCE; INTERCONNECT; TEMPERATURE; CATHODES; ANODE; ELECTROLYTE; DEPOSITION; HYDROGEN

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.43, no.33, pp.16215 - 16229

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2018.06.141
URI
http://hdl.handle.net/10203/245918
Appears in Collection
ME-Journal Papers(저널논문)
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