Novel KOH-free anion-exchange membrane fuel cell: Performance comparison of alternative anion-exchange ionomers in catalyst ink

Elise E. Switzer, Tim S. Olson, Abhaya K. Datye, Plamen Atanassov, Michael R. Hibbs, Cy Fujimoto, Christopher J. Cornelius

Research output: Contribution to journalArticle

54 Scopus citations

Abstract

Alkaline membrane electrode assemblies (MEAs) were fabricated and tested in 5 cm2 single cell configuration. The fuel cell tests were preformed in the absence of any liquid electrolyte, such as KOH. This study shows fuel cell polarization curves for alkaline membrane fuel cell (AMFC) systems that were fabricated with novel anion-exchange ionomers. A comparison of two novel anion-exchange ionomers incorporated into the catalyst ink was achieved by comparing the performance under H2/O2 and H2/air operating conditions. The results presented here indicate that the chemical and physical properties of the recast anion-exchange ionomer that is utilized in AMFC catalyst layers directly influence the obtainable fuel cell performance. It is shown that ionomer materials that are less prone to swelling from hydration and tend to pack closely together in the solid state will result in stronger catalyst-ionomer interfacial interactions. The O2 transport properties in alkaline MEA cathodes are influenced by the resulting void volume of the electrode as defined by the structure and packing arrangement of the recast ionomer molecules.

Original languageEnglish (US)
Pages (from-to)3404-3408
Number of pages5
JournalElectrochimica Acta
Volume55
Issue number9
DOIs
Publication statusPublished - Mar 30 2010

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Keywords

  • Alkaline fuel cell
  • Anion-exchange ionomer
  • Anion-exchange membrane
  • KOH free
  • Membrane electrode assembly

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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