Tomographic analysis of porosity variation in gas diffusion layer under freeze-thaw cycles
SCIE
SCOPUS
- Title
- Tomographic analysis of porosity variation in gas diffusion layer under freeze-thaw cycles
- Authors
- Seung Gon Kim; Lee, SJ
- Date Issued
- 2012-01
- Publisher
- Elsevier
- Abstract
- Synchrotron X-ray micro-computed tomography (X-ray mu CT) is employed to measure the volume variation of gas diffusion layer (GDL) of a polymer electrolyte fuel cell (PEFC). In the present study, 3D structures are reconstructed by merging orthogonal-plane images. Using the 3D reconstruction, the variation of structural parameters such as the porosity in GDL is investigated under freeze-thaw cycles. The freez-thaw cycles are established using cryo system and light source, respectively. As a result, a structural transformation is observed at the interface between GDL and micro porous layer (MPL). In addition, the porosity is critically changed with irreversible transition under freeze-thaw cycles. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
- Keywords
- Polymer electrolyte fuel cell; Gas diffusion layer; Tomography; Porosity; ELECTROLYTE FUEL-CELL; WATER DISTRIBUTION; PEMFC GDLS; DISTRIBUTIONS; SATURATION; TRANSPORT; CRACKS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16618
- DOI
- 10.1016/J.IJHYDENE.2011.09.052
- ISSN
- 0360-3199
- Article Type
- Article
- Citation
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol. 37, no. 1, page. 566 - 574, 2012-01
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