Functionalized ionic liquids based on quaternary ammonium cations with two ether groups as new electrolytes for Li/LiFePO4 secondary battery

Curled cation structures accelerate the dynamics of ionic liquids

“…Literature investigations on ammonium IL with two ether groups also revealed the presence of mainly glass transitions. 37,80 The impact of changing anion on the liquefaction temperatures for a common cation in this set is less distinct than that of changing cation when there is a common anion. The influence of the cations' side chains on the entropy of the liquid state seems to be the dominant factor for these samples.…”

Novel mixtures of ether-functionalized ionic liquids and non-flammable methylperfluorobutylether as safe electrolytes for lithium metal batteries

“…Cycling test of symmetric Li/electrolyte/Li cell combined with electrochemical impedance spectra (EIS) were oen used to investigate the interfacial characteristics of electrolyte/lithium metal. 7,[38][39][40][41] Firstly, the time evolution of the impedance response of symmetric lithium cell at open circuit was investigated as the previous reports, 29,42 and the results were presented in Fig. S6.…”

Lithium Battery Technologies

“…It appears that the electrochemical stability depends on the length of the longest alkyl chain of the cation (the shorter it is, the higher the oxidation potential is). 34 However, the addition of lithium salt generally improves the cathodic behavior thanks to the formation of a passive layer forms by insoluble lithium salts.…”