Hydrophobic Gas-Diffusion Media for Polymer-Electrolyte Fuel Cells by Direct Fluorination
dc.contributor.author | Van Nguyen, Trung | |
dc.contributor.author | Ahosseini, Azita | |
dc.contributor.author | Wang, Xuhai | |
dc.contributor.author | Yarlagadda, Venkata | |
dc.contributor.author | Kwong, Anthony | |
dc.contributor.author | Weber, Adam Z. | |
dc.contributor.author | Deevanhxay, Phengxay | |
dc.contributor.author | Tsushima, Shohji | |
dc.contributor.author | Hirai, Schuichiro | |
dc.date.accessioned | 2016-07-14T17:46:26Z | |
dc.date.available | 2016-07-14T17:46:26Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Van Nguyen, T., Ahosseini, A., Wang, X., Yarlagadda, V., Kwong, A., Weber, A. Z., ... & Hirai, S. (2015). Hydrophobic Gas-Diffusion Media for Polymer-Electrolyte Fuel Cells by Direct Fluorination. Journal of The Electrochemical Society, 162(14), F1451-F1460. | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/21108 | |
dc.description.abstract | A polymer-electrolyte fuel cell depends on proper water management to obtain high performance. During operation, liquid water is generated in the cell. When it is not properly and adequately removed, accumulation leads to poor fuel-cell performance by reducing and blocking the gas pores in the catalyst and gas-diffusion media. To address this problem, gas-diffusion media are often coated with a wet-proofing agent. This approach results in reduced pore size and volume resulting in lower transport properties, as well as inducing durability and performance issues due to the inherent non-uniformity. To overcome these issues, an alternative wet-proofing process called direct fluorination was developed. In this approach, fluorine gas reacts with carbon to create a more uniform, durable, and consistent wet-proof surface without affecting the morphology of the media. The fluorinated media showed capillary pressure properties that are more suitable for fuel-cell application. Fuel cells with fluorinated materials in the cathodes showed better performance, lower ohmic resistance, and lower liquid water amount in the cathode. These advantages are attributed to having a better wet-proofed fluorinated media at the cathode that forces water back to the anode, thereby keeping the membrane more hydrated and reducing the amount of water in and transported out of the cathode. | en_US |
dc.publisher | Electrochemical Society | en_US |
dc.rights | © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.subject | Gas diffusion media | en_US |
dc.subject | PEM fuel cells | en_US |
dc.subject | Water management | en_US |
dc.subject | Wet-proofing | en_US |
dc.subject | X-ray radiography | en_US |
dc.title | Hydrophobic Gas-Diffusion Media for Polymer-Electrolyte Fuel Cells by Direct Fluorination | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Nguyen, Trung Van | |
kusw.kuauthor | Ahosseini, Azita | |
kusw.kuauthor | Wang, Xuhai | |
kusw.kuauthor | Yarlagadda, Venkata | |
kusw.kudepartment | Chemical and Petroleum Engineering | en_US |
dc.identifier.doi | 10.1149/2.0411514jes | en_US |
dc.identifier.orcid | https://orcid.org/0000-0003-0479-2423 https://orcid.org/0000-0003-4544-066X | |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's license is described as: © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons
Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any
medium, provided the original work is properly cited.