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Issue 23, 2006
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Physicochemical properties of proton conducting membranes based on ionic liquid impregnated polymer for fuel cells

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Abstract

Polymer electrolyte membranes containing a room temperature ionic liquid, 2,3-dimethyl-1-octylimidazolium triflate (DMOImTf) in polyvinylidenefluoride-co-hexafluoropropylene (PVdF-HFP), show conductivity of 0.96 × 10−3 S cm−1 at 80 °C. The addition of triflic acid (HCF3SO3) increases the conductivity of the polymer electrolytes by providing free H+ ions, which is important for their potential use in proton exchange membrane fuel cells (PEMFCs) and other electrochemical devices. Line narrowing observed in the variation of 1H and 19F NMR line width with temperature shows that both protons and anions are mobile in these electrolytes. The membranes have been found to be thermally stable up to 200–300 °C. Polymer electrolyte membranes containing the ionic liquid have also been tested in a single cell fuel cell under non-humid conditions and found to be electroactive for hydrogen oxidation and oxygen reduction at platinum electrodes.

Graphical abstract: Physicochemical properties of proton conducting membranes based on ionic liquid impregnated polymer for fuel cells

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Publication details

The article was received on 15 Feb 2006, accepted on 27 Mar 2006 and first published on 18 Apr 2006


Article type: Paper
DOI: 10.1039/B602280D
Citation: J. Mater. Chem., 2006,16, 2256-2265
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    Physicochemical properties of proton conducting membranes based on ionic liquid impregnated polymer for fuel cells

    S. S. Sekhon, B. S. Lalia, J. Park, C. Kim and K. Yamada, J. Mater. Chem., 2006, 16, 2256
    DOI: 10.1039/B602280D

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