Transport properties of Nafion™ composite membranes for proton-exchange membranes fuel cells

F. Damay, L. C. Klein

Research output: Contribution to journalConference articlepeer-review

135 Scopus citations


The dielectric and electrical behaviors of a Nafion™ membrane, Nafion™/7SiO2-2P2O5-ZrO2 (SPZ), Nafion™/SiO2+H3PO4 (iHPO), Nafion™/SiO2+H3PW12O40 (iHPW) and Nafion™/ZrP composites were investigated using water desorption measurements and ac impedance spectroscopy as a function of time, relative humidity and temperature. The composite membranes except Nafion™/ZrP exhibited only marginally higher conductivity than Nafion™ at high temperature. Unlike the other membranes, the Nafion™/ZrP membrane showed reduced proton mobility with a higher activation energy. The results suggest that improvements in fuel cell performance, previously observed in Nafion™/SPZ and Nafion™/ZrP composite membranes, are not due simply to increased hydrophilic properties, but that there is an interplay between structure and proton mobility.

Original languageEnglish (US)
Pages (from-to)261-267
Number of pages7
JournalSolid State Ionics
StatePublished - Sep 2003
Event11th Cpnference on Solid (SSPC11) - Guildford, United Kingdom
Duration: Aug 27 2002Aug 30 2002

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


  • Impedance spectroscopy
  • Organic/inorganic nanocomposites
  • Proton conducting membranes
  • Sol-gel process


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