Zinc (II) chloride-based deep eutectic solvents for application as electrolytes: Preparation and characterization

Ghareh Bagh, Fatemeh S.;Shahbaz, Kaveh;Mjalli, Farouq S.;Hashim, Mohd A.;AlNashef, Inas M.

Abstract

Deep eutectic solvents (DESs) have gained interest due to their favorable electrochemical properties. This work introduced a new group of zinc (II) chloride based DESs and characterized their melting temperatures, viscosities, electrical conductivities, refractive indices, as well as electrical window over a wide range of temperatures. The ammonium-based deep eutectic solvents possessed lower melting temperatures, lower viscosities and higher electrical conductivities in comparison to phosphonium-based ones. The deep eutectic solvent made from choline chloride and zinc (II) chloride at a mole ratio of 1:1 possessed high conductivities, 574–4779 μS·cm− 1, relatively low viscosities, 0.8278–0.2842 Pa·s, and wide electrochemical window, 3.74 V within the studied temperature range. The attained measurements were compared with other reported deep eutectic solvents in the literature.

Journal

Journal of Molecular Liquids

Publication Name

Journal of Molecular Liquids

Volume

204

ISBN/ISSN

1873-3166

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Publisher

Elsevier

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DOI

10.1016/j.molliq.2015.01.025