Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 164, Issue 7, Pages F695-F703Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0071707jes
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
- University of Toronto Connaught International Scholarship for Doctoral Students
- NSERC Canada Graduate Scholarship
- Ontario Graduate Scholarship
- University of Toronto Mary H. Beatty Fellowship
- Mercedes-Benz Canada Graduate Fellowship in Fuel Cell Research
- Alexander von Humboldt foundation
- Impuls- und Vernetzungsfonds der Helmholtz Gesellschaft [VH-NG-616]
- German Federal Ministry for Economic Affairs and Energy project SoHMuSDaSS [03ET6057C]
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In this work, an ex situ accelerated carbon-corrosion-based ageing methodology is presented for stand-alone gas diffusion layers (GDLs). Pristine GDLs were subjected to carbon corrosion (degradation) via submersion in a hydrogen peroxide (H2O2) solution. The microporous layer (MPL) experiences up to nine times the loss in carbon mass compared to the carbon fiber substrate. The hydrophobicity of the GDL is also degraded as evidenced by a reduction in the surface contact angle, and this loss of hydrophobicity is associated with surface corrosion and polytetrafluoroethylene (PTFE) degradation. Performance testing reveals increases in mass transport losses for aged GDLs, which is a phenomenon that is attributed to the reduction in GDL hydrophobicity. (C) 2017 The Electrochemical Society. All rights reserved.
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