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Supercapacitive properties of electrodes built from ionic liquid-Multi Walled carbon Nanotubes (MWNTs) gel electrodes have been investigated. IL/MWNTs gel was easily prepared by adding MWNTs into 1-methyl-3-octadecylimidazolium bromide ionic liquid aqueous solution, then the resulting gel deposited on Nickel foam by electrophoretic deposition. Electrochemical characterizations were carried out by cyclicvoltammetery and impedance spectroscopy in 1M KOH aqueous solution at room temperature. The specific capacitance of this electrode (120 F/gr) was larger than those were reported for bare carbon nanotube electrodes, and pseudo faradic reactions have been detected. Introduction: Ever since their discovery by Iijima in 1991[1], due to their novel properties such as high specific surface area, high mesoporosity, high electrical conductivity, high electrolyte accessibility, carbon nanotubes (CNTs) are attractive electrode materials for developing highperformance supercapacitors [2]. However, the van der Waals interaction between tubes makes CNTs aggregate, which is the major limitation to their practical applications. To favour the dispersion of individual nanotubes and prevent their reaggregation, different approaches have been investigated to modify the surface of CNTs [3]. Recently Room Temperature Ionic Liquids (RT-ILs) with unique physicochemical properties such as wide liquid temperature range, high

Investigation of the supercapacitiveÂ performance of modified Carbon nanotube materials by 1-methyl-3-octadecylimidazolium bromide Ionic Liquid