Evaluation of methanol crossover in proton-conducting polyphosphazene membranes

Mark Valentinovich Fedkin, Xiangyang Zhou, Michael A. Hofmann, Elena Chalkova, Jamie A. Weston, Harry R. Allcock, Serguei Lvov

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Methanol crossover in proton-conducting polyphosphazene membranes was investigated using polymer electrolyte fuel cells. The transport of methanol through a membrane from the lower chamber of the cell to the upper chamber was conducted by molecular diffusion through the polymer structure. It is found that the methanol diffusion coefficients of phenyl phosphonic acid functionalized poly[aryloxyphosphazene] membranes in an aqueous methanol solution were 40 times lower than that of Nafion and 10-20 times lower with respect to sulfonated polyphosphazene membranes.

Original languageEnglish (US)
Pages (from-to)192-196
Number of pages5
JournalMaterials Letters
Issue number3
Publication statusPublished - Jan 1 2002


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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