Cho, Min Kyung Lee, Dae-Nyung Kim, Yi-Young Han, Jonghee Kim, Hyoung-Juhn Cho, Eunae Lim, Tae-Hoon Henkensmeier, Dirk Yoo, Sung Jong Sung, Yung-Eun Park, Sehkyu Jang, Jong Hyun 2024-01-20T09:00:16Z 2024-01-20T09:00:16Z 2021-09-02 2014-10 0360-3199 https://pubs.kist.re.kr/handle/201004/126300 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. English Pergamon Press Ltd. Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack Article 10.1016/j.ijhydene.2014.03.182 1 International Journal of Hydrogen Energy, v.39, no.29, pp.16548 - 16555 International Journal of Hydrogen Energy 39 29 16548 16555 N scie scopus 000343389700031 2-s2.0-84908060224 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article 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