Preparation and characterisation of non-aqueous proton-conducting membraneswith the low content of ionic liquids

J. S. Baek, J. S. Park, S. S. Sekhon, T. H. Yang, Y. G. Shul, J. H. Choi

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In this study, we prepared ionic liquid based composite membranes applicable for anhydrous and high temperature polymer electrolyte membrane fuel cells (PEMFCs). It is intended to minimise an increase in ionic conductivity of composite membranes by reducing the content of ionic liquids up to 30 wt% along with the addition of acids having the same anions as the ionic liquids. For this purpose, we prepared the composite membrane by solution recasting with 5 wt% Nafion solution, ionic liquids such as 1-ethyl-3- methylimidazolium trifluoro-methanesulphonate (EMITf) and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4), and acids such as trifluoromethanesulphonic acid (HTf) and tetra-fluoroboric acid (HBF4). The composite membranes were characterised by using small-angle X-ray scattering (SAXS), thermogravimetric analyser (TGA) and impedance spectroscopy. It was observed that the addition of the acids results in an increase in the proton conductivity of the composite membranes by reducing the viscosity of ionic liquids inside the composite membranes and also by providing additional proton ions due to the dissociation of the acids. In addition, the composite membranes exhibited better thermal stability over 300°C.

Original languageEnglish
Pages (from-to)762-769
Number of pages8
JournalFuel Cells
Volume10
Issue number5
DOIs
Publication statusPublished - 2010 Jan 1

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Composite membranes
Ionic liquids
Protons
Acids
Proton conductivity
Proton exchange membrane fuel cells (PEMFC)
Ionic conductivity
X ray scattering
Thermodynamic stability
Negative ions
Spectroscopy
Viscosity
Ions

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

Cite this

Baek, J. S. ; Park, J. S. ; Sekhon, S. S. ; Yang, T. H. ; Shul, Y. G. ; Choi, J. H. / Preparation and characterisation of non-aqueous proton-conducting membraneswith the low content of ionic liquids. In: Fuel Cells. 2010 ; Vol. 10, No. 5. pp. 762-769.
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Preparation and characterisation of non-aqueous proton-conducting membraneswith the low content of ionic liquids. / Baek, J. S.; Park, J. S.; Sekhon, S. S.; Yang, T. H.; Shul, Y. G.; Choi, J. H.

In: Fuel Cells, Vol. 10, No. 5, 01.01.2010, p. 762-769.

Research output: Contribution to journalArticle

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