Azepanium-based ionic liquids as green electrolytes for high voltage supercapacitors

This work provides a first-time-study of Azepanium-based ionic liquids (ILs) as electrolyte components for electrochemical double layer capacitors (EDLCs). Herein, two Azepanium-based ILs, namely N-methyl, N-butyl-azepanium bis(trifluoromethanesulfonyl)imide (Azp sub(14)TFSI) and N-methyl, N-hexyl-a...

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Bibliographic Details
Published in:Journal of power sources 2015, Vol.273, p.931-936
Main Authors: POHLMANN, S, OLYSCHLÄGER, T, GOODRICH, P, VICENTE, J. Alvarez, JACQUEMIN, J, BALDUCCI, A
Format: Article
Language:English
Subjects:
Applied sciences
Capacitors
Capacitors. Resistors. Filters
Double layer
Electric potential
Electrical engineering. Electrical power engineering
Electrolytes
Exact sciences and technology
High voltages
Ionic liquids
Power sources
Various equipment and components
Viscosity
Voltage
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Summary:This work provides a first-time-study of Azepanium-based ionic liquids (ILs) as electrolyte components for electrochemical double layer capacitors (EDLCs). Herein, two Azepanium-based ILs, namely N-methyl, N-butyl-azepanium bis(trifluoromethanesulfonyl)imide (Azp sub(14)TFSI) and N-methyl, N-hexyl-azepanium bis(trifluoromethanesulfonyl)imide (Azp sub(16)TFSI) were compared with the established IL N-butyl, Nmethyl pyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr sub(14)TFSI) in terms of viscosity, conductivity, thermal stability and electrochemical behavior in EDLC systems. The ILs' operative potentials were found to be comparable, leading to operative voltages up to 3.5 V without significant electrolyte degradation.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2014.09.167