Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack

Authors
Cho, Min KyungLee, Dae-NyungKim, Yi-YoungHan, JongheeKim, Hyoung-JuhnCho, EunaeLim, Tae-HoonHenkensmeier, DirkYoo, Sung JongSung, Yung-EunPark, SehkyuJang, Jong Hyun
Issue Date
2014-10
Publisher
Pergamon Press Ltd.
Citation
International Journal of Hydrogen Energy, v.39, no.29, pp.16548 - 16555
Abstract
Herein we report the spatially uneven degradation of a polymer electrolyte membrane fuel cell (PEMFC) stack operated under load variation. Fifteen sub-membrane electrode assemblies (sub-MEAs) at various cell positions and various points within each cell were obtained from the original MEAs employed in the fuel cell stack. Polarization curves and the voltammetric charge of these MEAs were measured in order to correlate localized performances with the redistributed electrochemically active surface on Pt using the polarization technique and cyclic voltammetry. Several ex situ characterizations including electron probe microanalysis, environmental scanning electron microscopy, and X-ray diffraction were also performed to find evidence, supporting the inhomogeneous degradation of the fuel cell stack. Possible routes and processes for the non-uniform stack degradation during the PEMFC stack operation will also be discussed. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Keywords
CARBON CORROSION; LOW-TEMPERATURE; PT/C CATALYSTS; DUMMY LOAD; PEMFC; DURABILITY; HUMIDITY; HYDROGEN; STARTUP; SUPPORT; Polymer electrolyte membrane fuel cell (PEMFC); Stack; Degradation; Carbon corrosion; Electrode thinning
ISSN
0360-3199
URI
https://pubs.kist.re.kr/handle/201004/126300
DOI
10.1016/j.ijhydene.2014.03.182
Appears in Collections:
KIST Article > 2014
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