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Updated: May 12, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Communication: collective dynamics of room-temperature ionic liquids and their Li ion solutions studied by
Kenta Fujii1, Mitsuhiro Shibayama, Tsuyoshi Yamaguchi
1Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. k-fujii@issp.u-tokyo.ac.jp
Abstract:
High-resolution inelastic X-ray scattering (IXS) measurements were performed for room-temperature ionic liquids (ILs) of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide and bis(fluorosulfonyl)amide, [C2mIm(+)][TFSA(-)] and [C2mIm(+)][FSA(-)], respectively, at ambient temperature. The observed spectra as a function of Q of 1.4-6 nm(-1) can be ascribed to quasi-elastic and inelastic scatterings, so that they are well represented with the fitting by using the Lorentz and the damped harmonic oscillator model functions to yield the dynamic structure factors. It was found in the intermediate scattering function, F(Q, t) that both ILs show the relaxation at t < 10 ps. The IXS measurements were also made on [C2mIm(+)][TFSA(-)] and [C2mIm(+)][FSA(-)] solutions dissolving Li salt. It is suggested that the adding of Li salt to IL significantly prolongs the relaxation time.
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