An improved hydrophobic coating for the porous gas diffusion layer in a PEM-based electrochemical hydrogen pump to mitigate anode flooding
•Anode flooding is a critical issue of PEM-based electrochemical hydrogen pump.•Coating the gas diffusion media with Ag-HDFT renders it super-hydrophobic.•The coating effectively eliminated the anode flooding issue. Anode flooding is a critical issue in proton exchange membrane (PEM)-based electroch...
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| Published in | Electrochemistry communications Vol. 117; p. 106777 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.08.2020
Elsevier |
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| Abstract | •Anode flooding is a critical issue of PEM-based electrochemical hydrogen pump.•Coating the gas diffusion media with Ag-HDFT renders it super-hydrophobic.•The coating effectively eliminated the anode flooding issue.
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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| AbstractList | •Anode flooding is a critical issue of PEM-based electrochemical hydrogen pump.•Coating the gas diffusion media with Ag-HDFT renders it super-hydrophobic.•The coating effectively eliminated the anode flooding issue.
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. 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. |
| ArticleNumber | 106777 |
| Author | Lee, Myoungseok Huang, Xinyu |
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| Cites_doi | 10.1016/j.apsusc.2014.08.187 10.1021/la0256533 10.1002/anie.200604596 10.1088/0034-4885/78/8/086501 10.1021/la051308c 10.1016/j.elecom.2019.01.017 10.1016/j.apsusc.2012.10.167 10.1080/19475411.2016.1272502 10.1016/j.ijhydene.2004.12.011 10.1016/j.jpowsour.2007.11.059 10.1016/j.spmi.2012.04.015 10.1021/la991660o 10.1021/la902882b 10.1016/j.phpro.2013.07.045 10.1016/j.apsusc.2008.06.018 10.1016/j.surfcoat.2010.01.033 10.1007/s10800-006-9266-0 |
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| Keywords | Hydrogen pump Hydrophobic coating Gas diffusion layer Anode flooding Super-hydrophobic surface |
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