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Article

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

1
Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
2
Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
3
Institute for Technical Chemistry and Environmental Chemistry, Friedrich Schiller University Jena, Philosophenweg 7a, 07743 Jena, Germany
4
Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
*
Authors to whom correspondence should be addressed.
Both authors contributed equally to this work.
Academic Editors: Claudio Mele, Alessandro Mariani, Matteo Bonomo and Xinpei Gao
Energies 2021, 14(19), 6344; https://doi.org/10.3390/en14196344
Received: 5 August 2021 / Revised: 19 September 2021 / Accepted: 22 September 2021 / Published: 4 October 2021
In this work, two new redox-active ionic liquids, one based on 2,2,6,6-tetramethylpiperidine-N-oxide and the other based on 4,4′-bipyridine, are synthesized and characterized. A ferrocene-based redox-active ionic liquid is used for referencing the results. All ionic liquids are formed via salt-metathesis from halogenate to bis(trifluoromethylsulfonyl)imide. Their fundamental thermal characteristics are assessed with differential scanning calorimetry. While the imidazolium ionic liquids show no melting point, the phase transition is well observable for the viologen-based ionic liquid. The properties of the neat redox-active ionic liquids and of binary mixtures containing these ionic liquids (0.1 m) and 1-butyl-1-methyl pyrrolidinium-bis(trifluoromethylsulfonyl)imide have been investigated. Finally, the use of these binary mixtures in combination with activated carbon-based electrodes has been considered in view of the use of these redox-active electrolytes in supercapacitors. View Full-Text
Keywords: redox-active ionic liquids; task-specific ionic liquids; ionic liquid mixtures; supercapacitors; energy storage redox-active ionic liquids; task-specific ionic liquids; ionic liquid mixtures; supercapacitors; energy storage
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MDPI and ACS Style

Borchers, P.S.; Gerlach, P.; Liu, Y.; Hager, M.D.; Balducci, A.; Schubert, U.S. 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. Energies 2021, 14, 6344. https://doi.org/10.3390/en14196344

AMA Style

Borchers PS, Gerlach P, Liu Y, Hager MD, Balducci A, Schubert US. 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. Energies. 2021; 14(19):6344. https://doi.org/10.3390/en14196344

Chicago/Turabian Style

Borchers, Philipp S., Patrick Gerlach, Yihan Liu, Martin D. Hager, Andrea Balducci, and Ulrich S. Schubert. 2021. "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" Energies 14, no. 19: 6344. https://doi.org/10.3390/en14196344

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