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

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Title
Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack
Author(s)
Min Kyung Cho; Dae-Nyung Lee; Yi-Young Kim; Jonghee Han; Hyoung-Juhn Kim; EunAe Cho; Tae-Hoon Lim; Dirk Henkensmeier; Sung Jong Yoo; Yung Eun Sung; Sehkyu Park; Jong Hyun Jang
Publication Date
2014-10
Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.39, no.29, pp.16548 -
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
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 ª 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/886
ISSN
0360-3199
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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