期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 117, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2020.106777
关键词
Hydrogen pump; Gas diffusion layer; Hydrophobic coating; Anode flooding; Super-hydrophobic surface
资金
- Industry/University Cooperative Research Center for Electrochemical Processes and Technology (CEProTECH, NSF I/UCRC Award) at the University of Ohio [1362057]
- Direct For Mathematical & Physical Scien [1362057] Funding Source: National Science Foundation
- Division Of Chemistry [1362057] Funding Source: National Science Foundation
Anode flooding is a critical issue in proton exchange membrane (PEM)-based electrochemical hydrogen pumps. Water-proofing the gas diffusion layer (GDL) on the anode side is a highly effective approach to mitigate the flooding problem and to enhance hydrogen pump performance. In this study, we report a low-cost, wet chemical process for water-proofing a metallic GDL. Silver particles, used as roughening and bonding agents, were first deposited on the porous metallic gas diffusion medium, and then heptadecafluoro-1-decanethiol (HDFT) was applied as a hydrophobic surface modifier. The result was a super-hydrophobic porous metallic GDL. Real electrochemical pump cell tests under simulated flooding conditions revealed that the water management performance of the coated GDL was dramatically improved.
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