Temperature Dependence on Density, Viscosity, and Electrical Conductivity of Ionic Liquid 1-Ethyl-3-Methylimidazolium Fluoride

Abstract

Ionic liquids are considered environmentally friendly media for various industrial applications. Basic data on physicochemical properties are significant for a new material, in terms of developing its potential applications. In this work, 1-ethyl-3-methylimidazolium fluoride ([EMIm]F) ionic liquid was synthesized via an anion metathesis process. Physical properties including the density, viscosity, electrical conductivity, and thermal stability of the product were measured. The results show that the density of [EMIm]F decreases linearly with temperature increases, while dynamic viscosity decreases rapidly below 320 K and the temperature dependence of electrical conductivity is in accordance with the VFT (Vogel-Fulcher-Tammann) equation. The temperature dependence of the density, conductivity, and viscosity of [EMIm]F can be expressed via the following equations: ρ = 1.516 − 1.22 × 10 −3 T, σ m = 4417.1exp[−953.17/(T − 166.65)] and η = 2.07 × 10 −7 exp(−5.39 × 10 4 /T), respectively. [EMIm]F exhibited no clear melting point. However, its glass transition point and decomposition temperature are −71.3 • C and 135 • C, respectively.

Hybrid Ionic Liquid Propylene Carbonate-Based Electrolytes for Aluminum–Air Batteries

“…Following that, the shift in potential displays an increase in the potential. This increase can be related to the formation of an active, yet protective Al x O y F z layer on the Al surface, as was previously reported. − Finally, stabilization of the potential near 0 V vs Al was obtained, most probably due to the similarity in the chemical composition of the Al working and reference electrode surfaces. − The potentiodynamic evaluations presented in Figure b implicate that high anodic current (of ∼2 mA cm –2 ) can be reached when Al is being polarized in the TBAH 2 F 3 electrolyte. This result is a clear indication of a successful activation process of the Al electrode surface.…”

“…The variation of the viscosity with temperature indicates that the interaction forces between the cation and anion present in the ionic liquid are affected by the temperature. While the ionic liquid viscosity influences the diffusional resistance in processes like mass transfer, the polarity and the presence of impurities (as well as moisture) in the electrolyte were previously proven to cause variations in the RTIL’s viscosity values by as much as 30% . As previously stated, a relatively new synthesized RTIL, EMIm­(HF) 2.3 F, was utilized for electrochemical energy storage applications. − Its low viscosity (4.85 cP), which results in its high ionic conductivity (∼100 mS cm –1 ), allows discharging the power source systems at high discharge loads .…”

Diagnosing the plasma formed during acoustic cavitation in [BEPip][NTf2] ionic liquid

“…As an IL, [BEPip][NTf2] is very viscous at room temperature and below, but in general the viscosity of RTIL decreases exponentially with temperature. 23 A high viscosity hinders nucleation and therefore limits the number of cavitation bubbles. 24 As the bulk temperature increases, the rates of nucleation and coalescence increase, leading to the formation of more (light emitting) cavitation bubbles, hence the higher SL intensity.…”

Electrodeposition of Copper Metal from the 1-Ethyl-3-methylimidazolium Fluoride ([EMIM]F)-urea-H₂O System Containing Cu₂O

“…Compared with common EMIM salts, [EMIM]F can provide an interesting RTIL in a hydrated or solvated form for metal electrodeposition. Although [EMIM]F has been reported by Hagiwara et al, 24,25 Rogers et al, 26 Xiao et al 27 and our group, 28,29 to our best knowledge, the application of [EMIM]F in metal electrodeposition has not been elucidated so far. These findings expand the range of applications of [EMIM]F and provide a simple route to extract copper particles from precursors of metal oxides at room temperature.…”