Mixtures of Azepanium Based Ionic Liquids and Propylene Carbonate as High Voltage Electrolytes for Supercapacitors

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...

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Published inElectrochimica acta Vol. 153; pp. 426 - 432
Main Authors Pohlmann, S., Olyschläger, T., Goodrich, P., Vicente, J. Alvarez, Jacquemin, J., Balducci, A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 20.01.2015
Subjects
Capacitors
Carbonates
Double layer
electrolyte
Electrolytes
Ionic liquids
mixtures
organic carbonates
Propylene
supercapacitors
Viscosity
Voltage
Ionic liquids
organic carbonates
supercapacitors
mixtures
electrolyte
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Summary: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 3.5V, while retaining the low viscosities and high conductivities of PC based EDLC electrolytes.
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ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2014.11.189