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In relation to this article, we declare that there is no conflict of interest.
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Received August 1, 2018
Accepted November 14, 2018
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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In situ electrochemical and mechanical accelerated stress tests of a gas diffusion layer for proton exchange membrane fuel cells

1Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Korea 2Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), 5 Hwarangno 14-gil, Seongbuk-gu, Seoul 02792, Korea 3Fuel Cell Technology Development Team, Eco Technology Center, Hyundai & Kia Motors, Yongin-si, Gyeonggi-do 16891, Korea
jhjang@kist.re.kr
Korean Journal of Chemical Engineering, February 2019, 36(2), 299-304(6), 10.1007/s11814-019-0223-0
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Abstract

This study proposes an in situ accelerated stress test of a gas diffusion layer (GDL) at a gas-solution-electrode triple phase boundary to individually examine electrochemical and mechanical GDL aging for the first time. Electrochemical GDL stability during repeated potential jumps and mechanical GDL robustness during inert gas permeation were investigated. A Pt-loaded GDL was used to mimic a GDL in contact with Pt particles at the cathode. It was also used to evaluate GDL degradation during an accelerated stress test. In this study, the GDL that experienced an electrochemical stress of potential jumps up to 1.75 V for 27.8 h exhibited 2.9-fold and 4-fold higher losses in electrochemical surface area and oxygen reduction current, respectively, than did one eroded by Ar permeation at 325 cm3 min-1 for 100 h.

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