Kinetic analysis of oxygen transport phenomena through ionomer thin film on Pt sueface in PEFC

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

Abstract

New equations for oxygen transport, which is driven by the chemical potential gradient through an ionomer thin film on a Pt surface, were developed. The chemical potential was described by two terms which indicated the effect of the oxygen concentration and that of the interaction between oxygen molecules and the ionomer film on the oxygen flux. The oxygen transport resistance of the ionomer/Pt interface was the largest, which is suggested to be attributed to the structural properties; the density of the ionomer/Pt interface is very high compared with the rest of regions, and the oxygen concentration is lower since the oxygen molecules are distributed locally in the ionomer/Pt interface while the oxygen molecules are distributed widely in the rest of regions. The oxygen transport resistance of the ionomer/Pt interface was underestimated while that of the ionomer/gas interface was overestimated if one considers only the concentration gradient as the driving force. Therefore, the oxygen-film interaction was found to have a significant effect on the oxygen transport resistances of the both interfaces.

Original languageEnglish
Title of host publicationECS Transactions
EditorsD.J. Jones, H. Gasteiger, H. Uchida, T.J. Schmidt, F. Buechi, K.E. Swider-Lyons, B.S. Pivovar, P.N. Pintauro, V.K. Ramani, J.M. Fenton, P. Strasser, K.E. Ayers, A.Z. Weber, T.F. Fuller, R.A. Mantz, H. Xu, C. Coutanceau, S. Mitsushima, S. Narayan, P. Shirvanian, Y.-T. Kim, Y. Gochi-Ponce
PublisherElectrochemical Society Inc.
Pages489-496
Number of pages8
Edition13
ISBN (Print)9781510871731
DOIs
Publication statusPublished - 2018
EventSymposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting - Cancun, Mexico
Duration: 2018 Sep 302018 Oct 4

Publication series

NameECS Transactions
Number13
Volume86
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Other

OtherSymposium on Polymer Electrolyte Fuel Cells and Electrolyzers 18, PEFC and E 2018 - AiMES 2018, ECS and SMEQ Joint International Meeting
Country/TerritoryMexico
CityCancun
Period18/9/3018/10/4

ASJC Scopus subject areas

  • Engineering(all)

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