Viscosity and relative viscosity of hydrophobic imidazolium type ionic liquids with dimethyl carbonate

Liu, Qing-Shan; Chu, Jiamin; Li, Kexin; Ma, Liansheng; Wang, Jian; Zang, Ying

doi:10.1016/j.jct.2020.106169

Cited by 16 publications

(3 citation statements)

References 32 publications

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“…This is consistent with previous reports for ILEs 59−62 and ILEs diluted with molecular solvents. 63 In line with increasing viscosity, the conductivity of the ILEs decreases with increasing Li + concentration, in accordance with prior studies for LiTFSI and NaTFSI addition to TFSI-based ILs. 64−67 To the authors' knowledge, there are no prior reports of the viscosity of LCILEs as a function of the metal ion concentration.…”

Section: Resultsmentioning

confidence: 99%

Nanostructure of Locally Concentrated Ionic Liquids in the Bulk and at Graphite and Gold Electrodes

Wang,

Buzolic,

Mullen

et al. 2023

ACS Nano

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The physical properties of ionic liquids (ILs) have led to intense research interest, but for many applications, high viscosity is problematic. Mixing the IL with a diluent that lowers viscosity offers a solution if the favorable IL physical properties are not compromised. Here we show that mixing an IL or IL electrolyte (ILE, an IL with dissolved metal ions) with a nonsolvating fluorous diluent produces a low viscosity mixture in which the local ion arrangements, and therefore key physical properties, are retained or enhanced. The locally concentrated ionic liquids (LCILs) examined are 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (HMIM TFSI), 1hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate (HMIM FAP), or 1-butyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate (BMIM FAP) mixed with 1,1,2,2-tetrafluoroethyl 2,2,2-trifluoroethyl ether (TFTFE) at 2:1, 1:1, and 1:2 (w/w) IL:TFTFE, as well as the locally concentrated ILEs (LCILEs) formed from 2:1 (w/w) HMIM TFSI−TFTFE with 0.25, 0.5, and 0.75 m lithium bis(trifluoromethylsulfonyl)imide (LiTFSI). Rheology and conductivity measurements reveal that the added TFTFE significantly reduces viscosity and increases ionic conductivity, and cyclic voltammetry (CV) reveals minimal reductions in electrochemical windows on gold and carbon electrodes. This is explained by the small-and wide-angle X-ray scattering (S/WAXS) and atomic force microscopy (AFM) data, which show that the local ion nanostructures are largely retained in LCILs and LCILEs in bulk and at gold and graphite electrodes for all potentials investigated.

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Section: Resultsmentioning

confidence: 99%

Nanostructure of Locally Concentrated Ionic Liquids in the Bulk and at Graphite and Gold Electrodes

Wang,

Buzolic,

Mullen

et al. 2023

ACS Nano

View full text Add to dashboard Cite

show abstract

“…The viscosity data of the studied systems is analyzed by using Jones–Dole eq ( η / η 0 ) − 1 / m = ( η normalr − 1 ) / m = A + B m where η r = η/η 0 , η and η 0 represent the viscosity of solution and solvent, respectively, m is the molality of the solution, the term A is called the Falkenhagen coefficient, , which represents interionic interactions, and B is the empirical constants or viscosity B -coefficient …”

Section: Resultsmentioning

confidence: 99%

“…where η r = η/η 0 , η and η 0 represent the viscosity of solution and solvent, respectively, m is the molality of the solution, the term A is called the Falkenhagen coefficient, 18,50 which represents interionic interactions, and B is the empirical constants or viscosity B-coefficient. 51 The viscosity B-coefficient informs about the measurement of effective hydrodynamic volume, which represents the solvation of solvated solutes or the solute−solvent interaction in the solution system.…”

Section: Partial Molar Volume Of Transfer At Infinite Dilutionmentioning

confidence: 99%

Exploring Various Molecular Interactions of Two Essential Amino Acids Prevalent in Aqueous Solutions of an Ionic Liquid by Density, Viscosity, Refractive Index, Conductance, Surface Tension, Nuclear Magnetic Resonance, Ultraviolet, and Computational Studies

Mallick,

Mondal,

Roy

et al. 2023

J. Chem. Eng. Data

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Bidentate Phosphonate‐Functionalized Ionic Liquid Exhibiting Better Ability in Improving the Performance of Lithium‐Ion Battery

Sang

Wang

et al. 2021

ChemistrySelect

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In this work, flame retarding phosphonate‐functionalized imidazolium ionic liquids (PFILs) were synthesized and employed as electrolyte additives for Li/LiFePO4 half‐cells. Physical and electrochemical properties, including ionic conductivity, electrochemical properties, electrochemical oxidation limit, electrochemical impedance spectroscopy (EIS) and lithium‐ion transference number (TLi+), were investigated. The results demonstrate that the addition of PFIL can improve the electrochemical performance of lithium‐ion batteries (LIBs). Hybrid electrolyte with 10 wt % bidentate phosphonate‐functionalized imidazolium ionic liquid (b‐PFIL) exhibits more excellent electrochemical oxidation stability (up to 4.77 V vs. Li/Li+), capacity retention (87.3 % after 400 cycles) and rate capability. These improvements can be ascribed to the enhanced lithium‐ion transference number (TLi+), which results from the stronger binding affinity between chelating b‐PFIL and LiPF6.

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Viscosity and relative viscosity of hydrophobic imidazolium type ionic liquids with dimethyl carbonate

Cited by 16 publications

References 32 publications

Nanostructure of Locally Concentrated Ionic Liquids in the Bulk and at Graphite and Gold Electrodes

Nanostructure of Locally Concentrated Ionic Liquids in the Bulk and at Graphite and Gold Electrodes

Exploring Various Molecular Interactions of Two Essential Amino Acids Prevalent in Aqueous Solutions of an Ionic Liquid by Density, Viscosity, Refractive Index, Conductance, Surface Tension, Nuclear Magnetic Resonance, Ultraviolet, and Computational Studies

Bidentate Phosphonate‐Functionalized Ionic Liquid Exhibiting Better Ability in Improving the Performance of Lithium‐Ion Battery

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