Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 164, Issue 7, Pages F714-F721Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0091707jes
Keywords
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- NSERC Discovery Accelerator Program
- NSERC Canada Research Chairs Program
- Ontario Ministry of Research and Innovation Early Researcher Award
- Canada Foundation for Innovation
- Alexander von Humboldt foundation
- Impuls- und Vernetzungsfonds der Helmholtz Gesellschaft [VH-NG-616]
- German Federal Ministry for Economic Affairs and Energy project SoHMuSDaSS [03ET6057C]
- NSERC Canada Graduate Scholarship
- NSERC Michael Smith Foreign Study Supplement
- Ontario Graduate Scholarship
- University of Toronto Mary H. Beatty Fellowship
- Mercedes-Benz Canada Graduate Fellowship in Fuel Cell Research
- University of Toronto Connaught International Scholarship for Doctoral Students
- William Dunbar Memorial Scholarship in Mechanical Engineering
- Mercedes-Benz Canada Graduate Fellowship for Fuel Cell Research
- Ara Mooradian Scholarship
- HATCH Graduate Scholarship
- David Sanborn Scott AMP
- Ron D. Venter Fellowship
- David Sanborn Scott Fellowship
- Pierre Rivard Hydrogenics Graduate Fellowship
- Natural Sciences and Engineering Research Council of Canada
- University of Saskatchewan
- Government of Saskatchewan
- Western Economic Diversification Canada
- National Research Council Canada
- Canadian Institutes of Health Research
- CLS Post-Doctoral and Graduate Student Travel Support Program
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A gas diffusion layer (GDL) was subjected to accelerated degradation (ageing) via complete submersion in hydrogen peroxide. The impacts of ageing were evaluated through deviations in limiting current densities, oxygen mass transport resistances, and liquid water saturation distributions in the aged GDL compared to pristine materials. For dry (volumetric oxygen concentration of 1%) and partially saturated cathode conditions (volumetric oxygen concentrations of 5%, 10%, and 21%), the fuel cell composed of aged GDLs reached limiting current densities up to 10.3% lower and experienced increases in overall oxygen mass transport resistance of up to 11.5% compared to the pristine GDLs. This performance reduction was attributed to a higher liquid water content in the aged GDL under the flow field channel compared to the pristine GDL. The results suggest that the higher saturation in the channel regions of the aged GDL led to increasingly restrictive gas transport due to the higher average water content and reduced pathways for reactant gas transport, therefore contributing to the reductions in the limiting current. In fuel cell builds with aged and pristine GDLs, up to 13.6 times more liquid water was present in the GDL under the rib compared to that under the channel at limiting current operation. (C) 2017 The Electrochemical Society. All rights reserved.
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