ABSTRACT

In the scope of improving the energy and power densities of electrochemical double layer capacitors (EDLCs), the development of high performance electrolytes with enhanced operative voltages is imperative. The formulation of mixtures containing ionic liquids with organic molecular solvents is an important strategy in the pursuit of developing highly electrochemically stable and safe materials while retaining fast transport properties for high power applications. In this work, we report on the physical-chemical investigations into binary mixtures containing the ionic liquid 1-butyl-1-methylpyrrolidinium bis{(trifluoromethyl)sulfonyl}imide with one mononitrile solvent, butyronitrile, and two dinitrile solvents, glutaronitrile and adiponitrile, as potential electrolytes for EDLCs. The thermal, volumetric and transport properties of the binary mixtures are investigated as functions of the electrolyte composition and temperature. Furthermore, the electrolyte composition which exhibits the highest conductivity for each of the binary mixtures was determined, and its electrochemical stability is reported using a glassy carbon macrodisk electrode.

Compounds

#	Formula	Name
1	C11H20F6N2O4S2	1-butyl-1-methylpyrrolidinium bis[(trifluoromethyl)sulfonyl]imide
2	C4H7N	butanenitrile
3	C5H6N2	pentanedinitrile
4	C6H8N2	hexanedinitrile

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Normal melting temperature, K ; Metastable crystal			Metastable crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	9
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	4	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	4	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	2 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	66
POMD	2 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	66
POMD	2 1	Solid-liquid equilibrium temperature, K ; Crystal 1 - 1	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Crystal 1 - 1 Liquid	DTA	4
POMD	2 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	7
POMD	3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	65
POMD	3 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	66
POMD	3 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	6
POMD	4 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	66
POMD	4 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	66
POMD	4 1	Solid-liquid equilibrium temperature, K ; Metastable crystal - 1	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Metastable crystal - 1 Liquid	DTA	4
POMD	4 1	Solid-liquid equilibrium temperature, K ; Crystal - 4	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Crystal - 4 Liquid	DTA	5
POMD	4 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	7

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Physical Chemical Characterization of Binary Mixtures of 1-Butyl-1-methylpyrrolidinium Bis{(trifluoromethyl)sulfonyl}imide and Aliphatic Nitrile Solvents as Potential Electrolytes for Electrochemical Energy Storage Applications

Neale, A. R.[Alex R.], Schutter, C.[Christoph], Wilde, P.[Patrick], Goodrich, P.[Peter], Hardacre, C.[Christopher], Passerini, S.[Stefano], Balducci, A.[Andrea], Jacquemin, J.[Johan]

ABSTRACT