Nafion-based composite electrolytes for proton exchange membrane fuel cells operating above 120 °c with titania nanoparticles and nanotubes as fillers

B. R. Matos, E. I. Santiago, J. F.Q. Rey, A. S. Ferlauto, E. Traversa, M. Linardi, F. C. Fonseca

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Nafion/titania-based fillers composites are prepared by casting and tested in proton exchange membrane fuel cells (PEMFCs) operating at elevated temperatures (130 °C). Three types of titania-based fillers are studied: nanoparticles with nearly spherical shape, mesoporous particles with high surface area, and hydrogen titanate nanotubes. Properties of composites related to PEMFC operation, such as water absorption/retention and proton conductivity, are determined and correlated with microstructural data obtained by small-angle X-ray scattering. The addition of titanate nanotubes changes more markedly the physical properties of the composite electrolytes as compared to titanium oxide nanoparticles with different surface area, a feature probably related to the intrinsic hydration and proton conductivity of the nanotubes. Polarization curves of H2/O2 PEMFCs using composite electrolytes indicate that composite electrolytes contribute to a significant boost of H 2/O2 PEMFC performance at 130 °C.

Original languageEnglish (US)
Pages (from-to)1061-1068
Number of pages8
JournalJournal of Power Sources
Volume196
Issue number3
DOIs
StatePublished - Feb 1 2011
Externally publishedYes

Keywords

  • Composite
  • Nafion
  • Nanotubes
  • PEM fuel cell
  • Titania

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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