Electrochemical impedance diagnosis or abnormal operational conditions for reliability of polymer electrolyte fuel cells in marine power application -sea salt contamination-

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polymer electrolyte fuel cells (PEFCs) have attracted attention for marine vessels because of their potential to reduce pollutant emissions on the ocean. Electrochemical impedance spectroscopy (EIS) is suitable for real-time diagnosis for marine PEFCs. In this study, EIS is used to assess the impact of sea salt (NaCI) contamination in the cathode through the fast Fourier transform technique combined with a transmission line model including proton conduction in the ionomer/electrolyte membrane and the charge/mass transfer resistances with associated capacitances as diagnostic parameters. Variations in those resistances from the polarization losses in accelerated degradation tests with NaCI injection are revealed together with the capacitances. Five hours' injection led to ca. 2.5 times larger mass transfer resistance possibly due to lowered hydrophobicity of the gas diffusion layer. Distilled water humidification after detecting the NaCI contamination at an early stage mitigates irreversible catalyst degradation indicated by transmission electron microscope observations.

Original languageEnglish
Title of host publicationPolymer Electrolyte Fuel Cells and Electrolyzers 19, PEFC and E 19
EditorsK. Swider-Lyons, H. Uchida, F. Buechi, W. E. Mustain, B. S. Pivovar, P. N. Pintauro, A. Z. Weber, D. Jones, H. Gasteiger, C. A. Rice, P. Strasser, E. Kjeang, K. Shinohara, S. Mitsushima, Y.-T. Kim, T. J. Schmidt, J. M. Fenton, R. A. Mantz, B. Lakshmanan, H. Xu
PublisherElectrochemical Society Inc.
Pages341-349
Number of pages9
Edition8
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2019
EventSymposium on Polymer Electrolyte Fuel Cells and Electrolyzers 19, PEFC and E 2019 - 236th ECS Meeting - Atlanta, United States
Duration: Oct 13 2019Oct 17 2019

Publication series

NameECS Transactions
Number8
Volume92
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

ConferenceSymposium on Polymer Electrolyte Fuel Cells and Electrolyzers 19, PEFC and E 2019 - 236th ECS Meeting
CountryUnited States
CityAtlanta
Period10/13/1910/17/19

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Nakajima, H., Kitahara, T., & Dan, K. (2019). Electrochemical impedance diagnosis or abnormal operational conditions for reliability of polymer electrolyte fuel cells in marine power application -sea salt contamination-. In K. Swider-Lyons, H. Uchida, F. Buechi, W. E. Mustain, B. S. Pivovar, P. N. Pintauro, A. Z. Weber, D. Jones, H. Gasteiger, C. A. Rice, P. Strasser, E. Kjeang, K. Shinohara, S. Mitsushima, Y-T. Kim, T. J. Schmidt, J. M. Fenton, R. A. Mantz, B. Lakshmanan, ... H. Xu (Eds.), Polymer Electrolyte Fuel Cells and Electrolyzers 19, PEFC and E 19 (8 ed., pp. 341-349). (ECS Transactions; Vol. 92, No. 8). Electrochemical Society Inc.. https://doi.org/10.1149/09208.0341ecst