Development of non-woven carbon felt composite bipolar plates using the soft layer method

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Carbon fiber reinforced polymer composites are ideal substitutes for brittle graphite for electrically conductive bipolar plates because of their high mechanical property and productivity. Early composite bipolar plates suffered from high electrical contact resistance due to the resin-rich area formed on the surface. To decrease the electrical contact resistance, the "soft layer method" was developed, which exposed bare carbon fibers on the composite surface. This method significantly improved the electrical as well as mechanical properties of composite bipolar plates. The remaining problem for wider commercialization of composite bipolar plates is their high fabrication pressure. In this work, a non-woven carbon felt composite bipolar plate was developed to obtain improved electrical properties with low fabrication pressure. The soft layer method was also used to expose bare carbon fibers. Compared to conventional high fiber volume fraction composite bipolar plates, the developed bipolar plate exhibited superior electrical properties. (C) 2016 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2017-01
Language
English
Article Type
Article
Keywords

MEMBRANE FUEL-CELLS; FIBER EPOXY COMPOSITE; FLOW BATTERY VRFB; SURFACE; PEMFC

Citation

COMPOSITE STRUCTURES, v.160, pp.976 - 982

ISSN
0263-8223
DOI
10.1016/j.compstruct.2016.10.107
URI
http://hdl.handle.net/10203/220385
Appears in Collection
ME-Journal Papers(저널논문)
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