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Hydrophobic fluorinated polyelectrolyte complex films and associated methods

  • US 8,071,255 B2
  • Filed: 03/19/2010
  • Issued: 12/06/2011
  • Est. Priority Date: 03/26/2004
  • Status: Active Grant
First Claim
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1. A fuel cell comprising a proton transporting membrane, wherein the proton transporting membrane comprises a polyelectrode film comprising a multilayer interpenetrating network of a net positively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms and a net negatively charged polyelectrolyte polymer comprising repeat units with at least two fluorine atoms, and further comprising a perfluorinated counterion within the multilayer;

  • wherein the perfluorinated counterion comprises a perfluorinated alkanesulfonic acid, a perfluorinated alkanecarboxylic acid, or both; and

    wherein said perfluorinated alkanesulfonic acid, said perfluorinated alkanecarboxylic acid or both has at least four fluorine atoms and an alkane component having a molecular weight up to 300 g per mole.

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