Three-electrode measurement configuration applied for measurements of supercapacitors properties. The prepared electrodes were used as working electrodes as well as a Pt sheet and an Ag/AgCl electrode as the counter and the reference electrodes, respectively. 

The electrochemical performance of the prepared electrodes was evaluated using a Metrohm Autolab PGSTAT302 potentiometer in conjunction with a two-electrode cell via cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge (CH-DCH) technique. 

The two-electrode cell contained two electrodes with dimensions of 10 mm x 10 mm and a filter paper separator that was positioned between them. All measurements were conducted at room temperature.