Enhanced electrochemical performances of nanocarbon composite based supercapacitor with ion-gel electrolyte = Enhanced electrochemical performances of nanocarbon composite based supercapacitor with ion-gel electrolyte

다국어 초록 (Multilingual Abstract)

The reduced graphene oxide (rGO)/activated carbon (AC) composites are coated on the aluminum substrate using spray coating technique to fabricate nanocarbon based supercapacitor. Polymer based solid-state xanthan-gum/Na₂SO₄ electrolyte is also introduced to increase stability of the supercapacitor. The electrochemical properties of the supercapacitor are evaluated by using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/ discharge tests. The highest capacitance value of the rGO/AC composite based supercapacitor is 120 F/g. The rGO/AC composite based supercapacitor is also retained ~85% of its initial capacitance value after application of the 3000 galvanostatic charge/discharge cycles.