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Effect of the fabrication condition of membrane electrode assemblies with carbon-supported ordered PtCo electrocatalyst on the durability of polymer electrolyte membrane fuel cells

Authors
Jung, JeawooPark, Hyun S.Han, JongheeKim, Hyoung-JuhnHenkensmeier, DirkYoo, Sung JongKim, Jin YoungLee, So YoungSong, Kwang HoPark, Hee-YoungJang, Jong Hyun
Issue Date
20-11월-2020
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Polymer electrolyte membrane fuel cell; Durability; Carbon supported ordered PtCo electrocatalyst; Hot press; Electrode structure reinforcement
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.45, no.57, pp.32834 - 32843
Indexed
SCIE
SCOPUS
Journal Title
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume
45
Number
57
Start Page
32834
End Page
32843
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/51473
DOI
10.1016/j.ijhydene.2020.03.053
ISSN
0360-3199
Abstract
Electrode structure improvement is one of the most promising paths for improving the durability of polymer electrolyte membrane fuel cells (PEMFCs). As strategies to prevent structural deformation and enhance the durability of membrane electrode assemblies (MEAs) with structurally ordered PtCo/C-based cathodes, we evaluated the effect of hot pressing and reinforcing the electrode's structure by increasing the ionomer content. Even though the initial performances of the hot-pressed MEA (HP) and the MEA with extra cathode ionomer (EI) were lower than that of the conventional MEA (CE) by 13.6% and 19.1%, respectively, CE degraded much more significantly than HP and EI after an accelerated degradation test. Therefore, HP and EI could deliver significantly higher single cell performances than CE (22.7% and 43.7%, respectively). The improvements in the durability of HP and EI could be correlated with the structural stability which could be evaluated by structure and electrochemical analysis including electrochemical impedance spectroscopy. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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SONG, Kwang Ho
공과대학 (화공생명공학과)
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