Mixtures of azepanium based ionic liquids and propylene carbonate as high voltage electrolytes for supercapacitors

S. Pohlmann, T. Olyschläger, P. Goodrich, J. Alvarez Vicente, J. Jacquemin*, A. Balducci

*Corresponding author for this work

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

This work provides a study of mixtures of the azepanium-based ionic liquid (IL) N-methyl, N-butyl-azepanium bis[(trifluoromethane) sulfonyl]imide (Azp14TFSI) and propylene carbonate (PC) as electrolyte components in electrochemical double layer capacitors (EDLCs). The considered mixtures' properties were then compared to the properties of mixtures of N-butyl, N-methylpyrrolidinium bis[(trifluoromethane) sulfonyl]imide (Pyr14TFSI) and PC in terms of viscosity, conductivity and electrochemical behavior. The mixtures' operative potentials were found to be comparable to each other, leading to operative voltages as high as 3.5 V, while retaining the low viscosities and high conductivities of PC based EDLC electrolytes.

Original languageEnglish
Pages (from-to)426-432
Number of pages7
JournalElectrochimica Acta
Volume153
Early online date01 Dec 2014
DOIs
Publication statusPublished - 20 Jan 2015

Keywords

  • electrolyte
  • Ionic liquids
  • mixtures
  • organic carbonates
  • supercapacitors

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

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