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Updated: Apr 23, 2026
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Destructuring ionic liquids in ionogels: enhanced fragility for solid devices
A Guyomard-Lack1, P-E Delannoy, N Dupré
1Institut des Matériaux Jean Rouxel (IMN) - CNRS - Université de Nantes - 2, rue de la Houssinière, B.P. 32229, 44322 Nantes Cedex 3, France. jean.lebideau@cnrs-imn.fr.
Abstract:
Confining ionic liquids (ILs) with added lithium salt within silica host networks enhances their fragility and improves their conductivity. Overall, conductivity measurements, Raman spectroscopy of the TFSI anion and NMR spectroscopy of the lithium cation show segregative interaction of lithium ions with the SiO2 host matrix. This implies at IL/SiO2 interfaces a breakdown of aggregated regions that are found systematically in bulk ILs. Such destructuration due to the interface effect determines the fragility and thus results locally at the interface in short relaxation times, low viscosity, and good ionic conductivity. The "destructuration" of ion pairs or domains makes ILs within ionogels a competitive alternative to existing solid ionic conductors in all-solid devices, such as lithium batteries and supercapacitors.
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