Reliable sealing design of metal-based solid oxide fuel cell stacks for transportation applications

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Recently, metal-based solid oxide fuel cells (SOFCs) receive much attention as new power converting systems, and reliable sealing is an essential requirement for the metal-based SOFC stacks. In this study, metal-based SOFC stacks with a reliable sealing method are developed for transportation applications. For successful development, bolt-spring and hydraulic compression methods for stack tightening are discussed in terms of their applicability to vehicles. Then, detailed stack designs are developed to obtain sufficient compressive stress on the surfaces of the sealing gaskets based on the finite element method (FEM). To maintain the compression and heat insulation of the stack, a hot box is designed based on the thermogravimetric properties, shrinkage behaviors, and mechanical properties of sealing gaskets of mica and Thermiculite 866LS, and ceramic fiber insulating board. As a result, a 1-cell stack unit is successfully fabricated and tested based on the designs, and a sealing rate of 100 +/- 0.78% is achieved at an operating temperature of 800 degrees C. This study investigates comprehensive stack and sealing design processes, and it has broad implications for reliable stack development. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2019-11
Language
English
Article Type
Article
Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.44, no.57, pp.30280 - 30292

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2019.09.087
URI
http://hdl.handle.net/10203/269815
Appears in Collection
ME-Journal Papers(저널논문)
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