%0 Journal Article
%A Cai, Yingjun
%A von Solms, Nicolas
%A Zhang, Suojiang
%A Thomsen, Kaj
%D 2020
%T Density, Viscosity, and Conductivity of [VAIM][TFSI]
in Mixtures for Lithium-Ion Battery Electrolytes
%U https://acs.figshare.com/articles/journal_contribution/Density_Viscosity_and_Conductivity_of_VAIM_TFSI_in_Mixtures_for_Lithium-Ion_Battery_Electrolytes/11568597
%R 10.1021/acs.jced.9b00648.s001
%2 https://acs.figshare.com/ndownloader/files/20805405
%K mixture
%K Excess molar volumes
%K VAIM
%K Lithium-Ion Battery Electrolytes
%K electrolyte
%K conductivity
%K density
%K Karl Fischer titration
%K content
%K acetonitrile
%K 298.15 K
%K viscosity
%K 0.07 mole fraction
%K wt
%X A novel unsaturated
and amide-based ionic liquid, [VAIM][TFSI]
(3-(2-amino-2-oxoethyl)-1-vinylimidazolium bis(trifluoromethylsulfonyl)amide),
was synthesized using a two-step method. Its structure was confirmed
by nuclear magnetic resonance, and its water content was determined
by Karl Fischer titration to be below 0.03 wt %. The density, viscosity,
and conductivity of the pure ionic liquid and its binary mixtures
with acetonitrile were measured at various temperatures and at ambient
pressure. Both the density and viscosity increase with the mole fraction
of the ionic liquid and decrease with decreasing temperature. Excess
molar volumes and viscosity deviations were calculated from the experimental
results. The electrical conductivities in mixtures with different
contents of the ionic liquid were investigated at different temperatures.
The highest conductivity of binary mixtures is achieved at 0.07 mole
fraction, with a value of ∼3.32 S·m–1 at 298.15 K. The conductivity of an electrolyte consisting of acetonitrile,
LiTFSI, and the ionic liquid was measured to determine the optimal
ionic liquid content. The suggested concentration is 3 wt% ionic liquid
in this electrolyte, giving a conductivity of ∼4.11 S·m–1 at 298.15 K.
%I ACS Publications