ION TRANSPORT IN BINARY-SALT IONIC LIQUIDS
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Aug 10, 2017
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Feb 10, 2017
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Feb 10, 2016
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The viscosity of various ionic liquids (IL), the solvent tetraethylene glycol dimethyl ether (G4), and their mixtures, with or without lithium salts, were measured experimentally. Various compositions were studied spectroscopically. Detailed analysis reveals that G4 preferentially solvates cations, leading to a reduction in the interaction energy between cations and anions and a subsequent enhancement in anion mobility. Diffusivity and ionic conductivity of certain compositions were improved at G4 mole fractions below levels required for a “solvate ionic liquid”. When an IL was combined with low amounts of a 1:1 stoichiometric ratio of G4 and lithium salt, the viscosity of composition remained constant and ion mobility increased.
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