Conditions Extrêmes et Matériaux : Haute Température et Irradiation

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D.Gyabeng, P.A.Martin, U.Pal, M.Deschamps, M.Forsyth, L.A.O’Dell, 'Investigating intermolecular interactions in a DME-based hybrid ionic liquid electrolyte by HOESY NMR', Frontiers in Chemistry 7 4 (2019) doi:10.3389/fchem.2019.00004

The ion interactions in a hybrid electrolyte based on various compositions of N-methyl-N-propyl pyrrolidinium (C3mpyr) flourosulfonylimide (FSI), LiFSI and an ether, 1,2-dimethoxy ethane (DME) have been investigated using the HOESY (Heteronuclear Overhauser Effect SpectroscopY) NMR experiment. This NMR technique allows a quantification of the ionic interactions in ionic liquids (ILs) by measuring the cross-relaxation rate σ between different pairs of nuclei. Thereby, we compare the cross relaxation rates between the IL cations, anions and DME in these hybrid electrolyte systems and interpret them in terms of ion associations. The results give insights into the local coordination environment of the Li+ cations and their solvation by the FSI and DME.