Observation of flooding-induced performance enhancement in PEMFCs

Choi, Heesoo; Kim, Jaeyeon; Kwon, Obeen; Yoo, Hongnyoung; Kim, Hyeok; Cha, Hyeonjin; Park, Taehyun

doi:10.1016/j.ijhydene.2021.11.234

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Observation of flooding-induced performance enhancement in PEMFCs

Choi, Heesoo;
Kim, Jaeyeon;
Kwon, Obeen;
Yoo, Hongnyoung;
Kim, Hyeok;
... Park, Taehyun;
외 1명

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WEB OF SCIENCE

33

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34

초록

In this study, water removal is observed through a transparent fuel cell, and the relationships between it and the responses of voltage and impedance are analyzed. The water flows in the channel are accompanied by voltage soaring. For all studied cases, water flow appearances increase as GDL flooding is induced by supplying more vapor; for example, under a stoichiometry ratio of 2.0, the number of water flow appearances is 0, 3, and 25 for 1800 s as relative humidity increase to 30, 50, and 100%. The average voltage is calculated, and a positive relationship between it and the frequency of water flows is determined. The results reveal that frequent flooding-induced water removal could be one strategy to enhance fuel cell performance. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

키워드

Proton exchange membrane fuel cell; Visualization; Flooding; Water management; Voltage recovery; GAS-DIFFUSION LAYER; MEMBRANE FUEL-CELL; WATER DISTRIBUTION; MICROPOROUS LAYER; CATHODE; TRANSPORT; MODEL

제목: Observation of flooding-induced performance enhancement in PEMFCs

저자: Choi, Heesoo; Kim, Jaeyeon; Kwon, Obeen; Yoo, Hongnyoung; Kim, Hyeok; Cha, Hyeonjin; Park, Taehyun

DOI: 10.1016/j.ijhydene.2021.11.234

발행일: 2022-01-29

유형: Article

저널명: International Journal of Hydrogen Energy

권: 47

호: 9

페이지: 6259 ~ 6268