Evaluation of methanol crossover in proton-conducting polyphosphazene membranes

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

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


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
StatePublished - Jan 2002
Externally publishedYes


  • Diffusion coefficients
  • Methanol crossover
  • Polymer electrolyte fuel cells
  • Polyphosphazene electrolyte membranes

ASJC Scopus subject areas

  • Materials Science(all)


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