Effect of Perforation Structure of Cathode GDL on Liquid Water Removal in PEFC
Open accessAbstract
In order to alleviate water flooding in cathode electrode of polymer electrolyte fuel cell (PEFC), it is essential to understand the liquid water bahavior across porous media and design the optimum electrode structure for enhancing water drainage on cathode side. In this study, the liquid water transport in the cathode of an operating PEFC was visualized macro- and microscopically using optical techniques, and the effect of perforation structure of cathode gas diffusion layer (GDL) on the water removal and performance improvement was discussed. The perforated GDL was fabricated by electric discharge machining (EDM) and manual micro-drilling technique. It was found that the perforation holes machined by the micro-drilling promotes the liquid water discharge from the GDL and effectively reduces water accumulation in the cathode electrode, because the hydrophobic PTFE coating at the hole sidewall is not damaged.
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Electrodischarge machining or laser perforation improves the wettability of the gas diffusion layer and enhances liquid water removal, effectively improving water management performance.
“This strategy improves the wettability of the GDL while enhancing liquid water removal, effectively improving water management performance [150, 152, 158].”
From Recent Advances on PEM Fuel Cells: From Key Materials to Membrane Electrode Assembly (2023) · cites this paper as [150]
During electrodischarge machining or laser perforation, the diffusion channels around the water channels gain hydrophilic pores due to degradation of the hydrophobic layer.
“It has been shown that during EDM or laser perforation, the diffusion channels around the water channels gain some hydrophilic pores due to the degradation of the hydrophobic layer.”
From Recent Advances on PEM Fuel Cells: From Key Materials to Membrane Electrode Assembly (2023) · cites this paper as [150]
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Recent Advances on PEM Fuel Cells: From Key Materials to Membrane Electrode Assembly
Mo, S., Du, L., Huang, Z., Chen, J., Zhou, Y., Wu, P., Meng, L., Wang, N., Xing, L., Zhao, M., et al. (2023) · Electrochemical Energy Reviews · doi:10.1007/s41918-023-00190-w · Cited by 277 · see citing works
“This strategy improves the wettability of the GDL while enhancing liquid water removal, effectively improving water management performance [150, 152, 158].”
- Authors
- Okuhata, G., Tonoike, T., Nishida, K., Tsushima, S., & Hirai, S.
- Affiliations
- Kyoto Institute of Technology (JP)
- Tokyo Institute of Technology (JP)
- Venue
- ECS Transactions
- Publisher
- The Electrochemical Society
- Published
- 2013-08-31
- Volume
- 58
- Issue
- 1
- Pages
- 1047-1057
- ISSN
- 1938-5862 (ISSN-L)
- 1938-6737
- OpenAlex
- W1966015360
- Cited by
- 34
- References
- 0
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 10 · 2023: 2 · 2022: 5 · 2021: 4 · 2020: 2 · 2019: 3 · 2018: 1 · 2017: 1 · 2015: 2
- FWCI
- 0.81
- Type
- conference paper
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- ECS Transactions (publishedVersion)
- Funders
- Japan Society for the Promotion of Science (22246024, 24560230)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
- Keywords
- proton exchange membrane fuel cells, cathode gas diffusion layer, liquid water removal, waterflooding, water drainage, porous media, micro-drilling, electrical discharge machining, cathode
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