Ac impedance spectroscopy study of modified proton-exchange membrane nanocomposites

Françoise Damay, Lisa C. Klein

Research output: Contribution to journalConference articlepeer-review


The dielectric and electrical behaviors of a Nafion™ membrane, a Nafion™/7SiO2-2P2O5-ZrO2 gel composite, and a Nafion™/ZrP particle composite were investigated using ac impedance spectroscopy at different relative humidities and temperatures. Only Nafion™/7SiO2-2P2O5-ZrO2 showed a slightly higher conductivity than Nafion™ at high temperature. For Nafion™/ZrP, proton mobility was significantly lower, particularly at high relative humidity. The results suggest that improvement in fuel cell performance, previously measured on composite membranes, does not merely result from increased hydrophilic properties.

Original languageEnglish (US)
Pages (from-to)12-17
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume733 E
StatePublished - 2006
Event2002 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 1 2002Apr 5 2002

All Science Journal Classification (ASJC) codes

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


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