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

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)16548-16555
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number29
DOIs
Publication statusPublished - 2014 Oct 2

Keywords

  • Carbon corrosion
  • Degradation
  • Electrode thinning
  • Polymer electrolyte membrane fuel cell (PEMFC)
  • Stack

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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  • Cite this

    Cho, M. K., Lee, D. N., Kim, Y. Y., Han, J., Kim, H. J., Cho, E., Lim, T. H., Henkensmeier, D., Yoo, S. J., Sung, Y. E., Park, S., & Jang, J. H. (2014). Analysis of the spatially distributed performance degradation of a polymer electrolyte membrane fuel cell stack. International Journal of Hydrogen Energy, 39(29), 16548-16555. https://doi.org/10.1016/j.ijhydene.2014.03.182