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A hydrophobic blend binder for anti-water flooding of cathode catalyst layers in polymer electrolyte membrane fuel cells

Cited 17 time in Web of Science Cited 17 time in Scopus
Authors
Oh, Keun-Hwan; Kim, Wan-Keun; Sung, Kyung A.; Choo, Min-Ju; Nam, Kwan-Woo; Choi, Jang Wook; Park, Jung-Ki
Issue Date
2011-10
Citation
International Journal of Hydrogen Energy, Vol.36 No.21, pp.13695-13702
Keywords
Catalyst layerP(VdF-co-HFP)HydrophobicityWater floodingGlass transition temperature
Abstract
We report polymer electrolyte membrane fuel cells (PEMFCs) in which poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-co-HFP)) copolymer was added to the existing sPEEK binder in cathode catalyst layers (CCLs). Compared to a control case with no such copolymer, the cell with the copolymer exhibits improved performance, particularly in the oxygen mass transport. The improved mass transport behavior is attributed to the copolymer that makes CCLs more hydrophobic and thus suppresses water flooding significantly. Contact angle measurements and various electrochemical characterizations consistently support the copolymer effect for the improved oxygen mass transport. In addition, the introduction of P(VdF-co-HFP) lowers the glass transition temperature of the binder, which contributes to enhancing the adhesion properties between the CCLs and membranes. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
ISSN
0360-3199
URI
http://hdl.handle.net/10371/164568
DOI
https://doi.org/10.1016/j.ijhydene.2011.07.116
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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