The global need to expand the design of energy-storage devices led to the
investigation of alkali metal - Ionic Liquid (IL) mixtures as a possible class of
electrolytes. In this study, 1D and 2D Nuclear Magnetic Resonance (NMR) and
Electrochemical Impedance Spectroscopy (EIS) as well as Molecular Dynamics
(MD) simulations were used to study the intermolecular interactions in
imidazolium-based IL - water - alkali halide ternary mixtures. The 1H and
23Na 1D and 1H DOSY NMR spectra revealed that the presence of small
quantities of NaCl does not influence the aggregation of water molecules in
the IL nano-domains. The order of adding ionic compounds to water, as well as
the certain water and NaCl molecular ratios, lead to the formation of isolated
water clusters. Two ternary solutions representing different orders of
compounds mixing (H2O+ IL + NaCl or H2O+ NaCl + IL) showed a strong
dependence of the initial solvation shell of Na+ and the self-clustering of water.
Furthermore, the behaviour of water was found to be independent from the
conditions applied during the solution preparation, such as temperature and/or
duration of stirring and aging. These findings could be confirmed by large
differences in the amount of ionic species, observed in the ternary solutions and
depending on the order of mixing/solute preparation.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:92908 |
| Date | 05 August 2024 |
| Creators | Dziubinska-Kühn, Katarzyna, Maddah, Mina, Pupier, Marion, Matysik, Jörg, Viger-Gravel, Jasmine, Kowalska, Magdalena, Karg, Beatrice |
| Publisher | Frontiers Media |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | Finnish |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 2296-2646, 10.3389/fchem.2022.1028912 |
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