The Influence of the Nature of Redox-Active Moieties on the Properties of Redox-Active Ionic Liquids and on Their Use as Electrolyte for Supercapacitors

In this work, two new redox-active ionic liquids, one based on 2,2,6,6-tetramethylpiperidine-N-oxide and the other 4,4?-bipyridine, are synthesized characterized. A ferrocene-based liquid is used for referencing results. All liquids formed via salt-metathesis from halogenate to bis(trifluoromethylsulfonyl)imide. Their fundamental thermal characteristics assessed with differential scanning calorimetry. While imidazolium show no melting point, phase transition well observable viologen-based liquid. The properties of neat binary mixtures containing these (0.1 m) 1-butyl-1-methyl pyrrolidinium-bis(trifluoromethylsulfonyl)imide have been investigated. Finally, use in combination activated carbon-based electrodes has considered view electrolytes supercapacitors.