Structure and interactions of novel ether-functionalised morpholinium and piperidinium ionic liquids with lithium salts

Abstract

Investigation of the thermodynamic and transport properties of four novel ether-functionalised piperidinium and morpholinium ionic liquids with LiFSI and LiTFSI salts, and Li-ion coordination in ionic liquids.

A comparison of the impact of cation chemistry in ionic liquid-based lithium battery electrolytes

“…It is worth noting that both electrolytes exhibit relatively small fragility factor, D , consistent with the behaviour of liquids that form fragile glass structures. A comparison of the VFT parameters with other IL-salt electrolytes, 55,56 indicates that the pseudo activation energies ( B ) in both electrolytes are either in the same range or lower than the other electrolytes. A comparison of the T 0 values also shows that they are lower in comparison to some ILs reported in the literatures.…”

“…To illustrate, the T 0 values are lower than the value observed in 0.5 M LiTFSI in [N 2(2O2O1)3 ][TFSI] (210 K), 55 2.7 M LiFSI in [N 2(2O2O1)3 ][TFSI] (207 K), 55 or in 10 mol% LiFSI in [C 1O1mmor ][FSI] (202 K). 56…”

“…(202 K). 56 High ionic conductivity is an indicator of a promising electrolyte in terms of the applicability of the electrolytes in a device. However, all ions in the high salt content IL contribute to the measured ionic conductivity; high Li ion conductivity is also important to achieve good device performance.…”

Physicochemical Properties of Pyrrolidinium-based Room Temperature Ionic Liquids with Propoxyethyl, Ethoxypropyl, or (Methoxymethoxy)ethyl Group

“…[6][7][8] This effect has been reported since the 2000s, and even in recent years, various literature have been published describing the development of new RTILs with ether functional groups and the analysis of their physicochemical properties. [9][10][11][12][13][14][15] Rauber et al reported that the development of RTILs composed of symmetric cation with ether group and symmetric anion. 14 Warrington et al investigated the introduction effect of ether group into piperidinium and morpholinium cations on their physicochemical properties.…”

“…14 Warrington et al investigated the introduction effect of ether group into piperidinium and morpholinium cations on their physicochemical properties. 15 Understanding the structure-physicochemical properties correlation and properties as an electrolyte of ether-functionalized RTILs is quite important for the creation of the next generation of RTILs.…”