Conduction Through Viscoelastic Phase in a Redox-Active Ionic Liquid at Reduced Temperatures

The phase diagram of the redox active ionic liquid 1-methyl-3-propylimidazolium iodide (PMII) is examined as a function of temperature and iodine concentration. Beyond a threshold concentration of 3.9 M, the formation of higher polyiodides gives rise to a viscoelastic phase upon cooling. Despite of the very high viscosity of such polyiodide-containing PMII melts a strikingly high conductivity is maintained through Grotthuss-type bond exchange and ionic conduction.


Published in:
Advanced Materials, 24, 781-784
Year:
2012
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 Record created 2012-03-01, last modified 2018-03-18

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