Phenyl phosphonic acid functionalized poly[aryloxyphosphazenes] as proton-conducting membranes for direct methanol fuel cells

Harry R. Allcock, Michael A. Hofmann, Catherine M. Ambler, Serguei N. Lvov, Xiangyang Zhou, Elena Chalkova, Jamie Weston

Research output: Contribution to journalArticle

149 Citations (Scopus)

Abstract

A method for the synthesis of phenyl phosphonic acid functionalized poly[aryloxyphosphazene] membranes is described. Membranes of polymers with total ion-exchange capacities between 1.17 and 1.43meq.g-1 were cast from N,N-dimethyl-formamide and found to have proton conductivities between 10-2 and 10-1Scm-1. Equilibrium water swelling values were determined to be between 11 and 32% depending on the polymer structure. Methanol diffusion coefficients for both radiation cross-linked and non-cross-linked membranes in 3M aqueous methanol at 80°C and 2.8bar were found to be at least 12 times lower than for Nafion 117, and 6 times lower than for a radiation cross-linked sulfonated polyphosphazene membrane.

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalJournal of Membrane Science
Volume201
Issue number1-2
DOIs
StatePublished - May 31 2002
Externally publishedYes

Fingerprint

Direct methanol fuel cells (DMFC)
fuel cells
Methanol
Protons
methyl alcohol
membranes
Membranes
conduction
acids
protons
Acids
Polymers
Radiation
Dimethylformamide
Proton conductivity
Ion Exchange
polymers
radiation
swelling
Swelling

Keywords

  • Diffusion
  • Direct methanol fuel cells
  • Ion-exchange membranes
  • Polyphosphazenes

ASJC Scopus subject areas

  • Filtration and Separation
  • Polymers and Plastics

Cite this

Phenyl phosphonic acid functionalized poly[aryloxyphosphazenes] as proton-conducting membranes for direct methanol fuel cells. / Allcock, Harry R.; Hofmann, Michael A.; Ambler, Catherine M.; Lvov, Serguei N.; Zhou, Xiangyang; Chalkova, Elena; Weston, Jamie.

In: Journal of Membrane Science, Vol. 201, No. 1-2, 31.05.2002, p. 47-54.

Research output: Contribution to journalArticle

Allcock, Harry R. ; Hofmann, Michael A. ; Ambler, Catherine M. ; Lvov, Serguei N. ; Zhou, Xiangyang ; Chalkova, Elena ; Weston, Jamie. / Phenyl phosphonic acid functionalized poly[aryloxyphosphazenes] as proton-conducting membranes for direct methanol fuel cells. In: Journal of Membrane Science. 2002 ; Vol. 201, No. 1-2. pp. 47-54.
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AU - Zhou, Xiangyang

AU - Chalkova, Elena

AU - Weston, Jamie

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