Imidazole and 1-methyl imidazole in phosphoric acid doped polybenzimidazole, electrolyte for fuel cells

Alex Schechter, Robert F. Savinell

Research output: Contribution to journalArticlepeer-review

205 Scopus citations

Abstract

Imidazole and 1-methyl imidazole (Me-Im) were used as additives in polybenzimidazole (PBI) equilibrated with phosphoric acid (PA), a system shown to be a high-temperature proton-conducting polymer electrolyte. The influence of different concentrations of this additive on the conductivity of these membranes was measured by a four-probe conductivity measurement, at temperatures in the range of 80-200 °C, under various humidity conditions. Correlation was found between the conductivity of liquid solutions of concentrated phosphoric acid and that of H3PO4 in the PBI membranes.

Original languageEnglish
Pages (from-to)181-187
Number of pages7
JournalSolid State Ionics
Volume147
Issue number1-2
DOIs
StatePublished - 1 Mar 2002
Externally publishedYes

Keywords

  • Conductivity
  • Fuel cell (FC)
  • Imidazole (Im)
  • Phosphoric acid (PA)
  • Polybenzimidazole (PBI)

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