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

作者：Pohlmann S; Olyschlaeger T; Goodrich P; Vicente J Alvarez; Jacquemin J^*; Balducci A

来源：Journal of Power Sources, 2015, 273: 931-936.

DOI：10.1016/j.jpowsour.2014.09.167

• Ionic liquids
• Azepanium
• Supercapacitors
• High voltage

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(14)TFSI) and N-methyl, N-hexyl-azepanium bis(trifluoromethanesulfonyl)imide (Azp(16)TFSI) were compared with the established IL N-butyl, N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Pyr(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.

• 出版日期2015-1-1