Physicochemical properties and electrochemical performance of [ Pmim ] [ ClO4 ] ionic liquid electrolyte in supercapacitor
WU Xuan-yu
LI Mei-chao
ZHANG Xin-yuan
ZHANG Qing-guo
Abstract：A novel ionic liquid 1 -Pentyl -3 -methylimidazolium perchlorate salts ([ Pmim] ClO4 ) was synthesized by two -steps method .The density , surface tension , and electrical conductivity of the ionic liquid were investigated in different temperatures .A supercapacitor composed of the activated carbon electrode and the [ Pmim] ClO4 electrolyte was prepared .The electrochemical performance of the supercapacitor was studied by cy-clic voltammograms, alternating current resistance , and constant current charge -discharge tests, respectively. The results showed that the density and the surface tension of [ Pmim] ClO4 decreased with the increase of tem-perature.The working voltage window of the supercapacitor reached to 5.0 V.Moreover, the capacitor possessed typical capacitance characteristic , good reversibility , and better cycleability , which showed a great potential of this ionic liquid electrolyte in supercapacitor applications .
Keywords：ionic liquidelectrolytephysicochemical propertieselectrochemical performancesuperca-pacitor
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 67-74 )