The study on thermodynamic and electrochemical properties of ionic liquid N -butyl-pyridinium dicyanamide and binary system with propylene carbonate
ZHANG Qingguo
LI Qing
LIU Dongye
ZHANG Xinyuan
Abstract：A novel binary system of N -butyl-pyridinium dicyanamide ionic liquid ([Bpy][DCA]) and or-ganic solvent propylene carbonate (PC) was prepared over the whole concentration .The thermodynamic properties of density, viscosity, and electrical conductivity of the binary system were measured from 298.15 to 328.15 K.The excess molar volume (VE) and dynamic viscosity deviations (Δη) of the mixtures were calculated based on empiri-cal equation, and the change of VE and Δη were fitted by the Redlich-Kister (R-K) polynomial equation .The temperature dependences of the viscosity and electrical conductivity for the binary system were graphically depicted by the Vogel-Fulcher-Tamman ( VFT) equation .The pure ionic liquid was used as electrolyte to assemble the supercapacitor with activated carbon .The electrochemical potential window of the assembled supercapacitor was tested by cyclic voltammetry method .The electrochemical potential window of 3.0 V suggests its potential applica-tion in supercapacitor .
Keywords：ionic liquidbinary systemthermodynamic propertyexcess propertyelectrochemical poten-tial window
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 8-16 )