Optimization of the Technology for Manufacturing the Electrodes for Self-Charging Supercapacitors from Carbon Nanotubes

Abstract

The technology for manufacturing electrodes for supercapacitors based on commercial carbon nanotubes with the specific surface area of 109.6 m²/g is optimized aimed at their further application as the carbon electrodes in self-charging supercapacitors. The electrochemical characteristics of electrodes of carbon nanotubes are studied in a symmetrical two-electrode cell using the methods of cyclic voltammetry, galvanostatic charge–discharge, and impedance spectroscopy. The specific capacitance of the electrode in the organic electrolyte consisting of 1-butyl-3-methylimidazolium trifluoromethanesulfonate/propylene carbonate (volume ratio 3 : 1) is shown to be 9.1 F/g.