Rolled Supercapacitor Device Model Using Carbon-Sheet as Electrodes in KCl Electrolyte System

Abstract

Supercapacitor is an electronic device with characteristic of having higher power density than battery and higher energy density than conventional capacitor. In order to achieve exceptional power and energy density, it is necessary to use materials with high specific surface area as its electrodes. In this study, we prepared a rolled supercapacitor device model using carbon sheet as the electrodes and 1 M KCl electrolyte. A carbon sheet was soaked in 1 M KCl and assembled as a rolled supercapacitor device model. Performance of the rolled supercapacitor device model was measured using a cyclic voltammetry (CV) in a voltage range of-0.8 V to +0.1 V with scan rate variations of 1 mV/s, 5 mV/s, 10 mV/s, 15 mV/s and 20 mV/s. Cyclic voltammetry measurement provide results as follows, Esp = 0.289 to 0.103 Wh/kg and Psp = 5.024 to 35.738 W/kg. By using Ragone plot we found that the prepared rolled supercapacitor using carbon-sheet as electrodes had met criteria of supercapacitor. The result show that the carbon sheet has a good prospect to be used as electrodes for rolled supercapacitor.