1 -ethyl-3-methylimidazolium TFSI

A 0.1 M solution of freshly distilled pyrrole in dried and degassed l-ethyl-3-methylimidazolium trifiuoromethanesulfonylimide (TFSI) is prepared. The electrochemical polymerization is performed by cycling the working electrode (Pt) from —IV to +1V at lOOmV/s (reference Ag wire counter Pt coil). Typical cyclic voltammograms are obtained as shown in Figure 11.1. 

Recently, a series of IL electrolytes were tested for their applications in Li-S cells. Traditionally, the TFSI anion dominates the anion part of the ILs for the Li-S electrolytes, while typical cation examples are including the l-butyl-3- methyl-imidazolium (BMIM), l-ethyl-3-methylimidazolium (EMIM), 1-butyl-1-methy Ipyrrolidinium (PYR14), and 1-butyl-1-methylpiperidinium (PiP14) in Fig. 11 [18]. As in the traditional liquid electrolyte systems, the physical properties determine the solubility power charge distribution, polarity, viscosity and so forth. In the IL systems, however, the permittivity is largely independent of the combination of cations and anions, while variation in cations and anions affects the molecular level interactions, type/strengtii, and solvation. Due to unique properties, the ILs were studied as effective liquid electrolytes for the Li-S cells. 

EMI-TFSI l-ethyl-3-methylimidazolium-bis(trifluoromethyl-sulfonyl)imide... 

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