Thermophysical and Electrochemical Properties of Ethereal Functionalised Cyclic Alkylammonium-based Ionic Liquids as Potential Electrolytes for Electrochemical Applications

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Alex R NealeJohan Jacquemin

Abstract

A series of hydrophobic room temperature ionic liquids (ILs) based on ethereal functionalised pyrrolidinium, piperidinium and azepanium cations bearing the bis[(trifluoromethyl)sulfonyl]imide, [TFSI]- , anion were synthesized and characterized. Their physicochemical properties such as density, viscosity and electrolytic conductivity, and thermal properties including phase transition behaviour and decomposition temperature have been measured. All of the ILs showed low melting point, low viscosity and good conductivity and the latter properties have been discussed in terms of the IL fragility, an important electrolyte feature of the transport properties of glass-forming ILs. Furthermore, the studied [TFSI]- -based ILs generally exhibit good electrochemical stabilities and, by coupling electrochemical experiments and DFT calculations, the effect of ether functionalisation at the IL cation on the electrochemical stability of the IL is discussed. Preliminary investigations into the Li-redox chemistry at a Cu working electrode are also reported as a function of ether-functionality within the pyrrolidinium-based IL family. Overall, the results show that these ionic liquids are suitable for electrochemical devices such as battery syste...Continue Reading

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Citations

May 17, 2018·Chemical Communications : Chem Comm·Jennifer Chapman VarelaMark Grinstaff
Nov 28, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Frederik PhilippiRolf Hempelmann
Sep 27, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Sinead MurphyJohan Jacquemin
Jun 19, 2020·International Journal of Molecular Sciences·Jolanta FliegerMałgorzata Tatarczak-Michalewska
Oct 14, 2020·Physical Chemistry Chemical Physics : PCCP·Frederik PhilippiTom Welton
Apr 21, 2021·Physical Chemistry Chemical Physics : PCCP·Frederik Philippi, Tom Welton
Oct 21, 2020·The Journal of Physical Chemistry. B·Faiz Ullah ShahPatrik Johansson

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Methods Mentioned

BETA
differential scanning calorimetry
ionic dissociation

Software Mentioned

INVISTA
TmoleX
Turbomole
COSMOconfX

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