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

Title
Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack
Authors
조민경이대녕김이영한종희김형준조은애임태훈헨켄스마이어디억유성종성영은박세규장종현
Keywords
Polymer electrolyte membrane fuel cell (PEMFC); Stack; Degradation; Carbon corrosion; Electrode thinning
Issue Date
2014-10
Publisher
International journal of hydrogen energy
Citation
VOL 39, NO 29, 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.
URI
http://pubs.kist.re.kr/handle/201004/48131
ISSN
03603199
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KIST Publication > Article
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