PEG based hybrid composite membranes and their properties for H2/O2 fuel cells

T. Uma, T. Mahalingam, Arunachala Mada Kannan, L. Cindrella

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Hydrocarbon hybrid membranes of PEG/PMA/MPTMS/SiO2 and PEG/PMA/MPTMS/SiO2/GA were fabricated with various amounts of SiO2 and glutaraldehyde by sol-gel method. The composition of the hybrid membranes was examined by X-ray diffraction patterns, Fourier transform infrared (FTIR) spectra (FTIR-ATR) and proton nuclear magnetic resonance (NMR) techniques. The surface morphology of the cast membranes were analyzed by scanning electron microscopy. The conductivity values for all composites displayed a magnitude of 10-3 S cm-1, with greater improvements observed under conditions of various temperature and humidity. The proton conductivity of the composite membranes was measured at various temperatures at 50% RH using electrochemical impedance spectroscopy. In order to understand the proton conducting mechanism, the membranes were also subjected to conductivity measurement over wide RH range at 50 °C. It was observed that the hybrid membranes with glutaraldehyde additive as a crosslinking agent exhibited exceptionally high conductivity values at all RH conditions at 50 °C. The stable proton conductivity values at lower RH conditions indicate that the proton conduction mechanism is of diffusion type.

Original languageEnglish (US)
JournalInternational Journal of Hydrogen Energy
DOIs
StateAccepted/In press - Jan 9 2016

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Keywords

  • Cross-linked composite membranes
  • Proton conductivity
  • Structural study
  • Thermal study
  • Water uptake

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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