Abstract
<jats:p>The present work investigated the electrochemical properties of activated carbon material/conductive additive composites as electrodes for electrochemical capacitors in an aqueous electrolyte. The influence of the type of conductive additive on the specific capacitance characteristics of the obtained activated carbon material has been established. The activated carbon material (ACM) was obtained by thermochemical activation of plant-based raw material using potassium hydroxide. The influence of the type of conductive additive on the electrochemical properties of the activated carbon material was studied by means of electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic charge/discharge measurements. The study demonstrated that the choice of conductive additive significantly affects the performance of electrochemical capacitors, particularly the specific capacitance of the electrode material and its stability during cycling. Among the tested conductive additives, Super-P carbon black proved to be the most promising, as its combination with the activated carbon material provides optimal electrochemical characteristics. The resulting composite exhibits the highest specific capacitance (~100-120 F/g), stable performance at high charge-discharge rates, and a significant reduction in internal resistance, which is crucial for enhancing the energy and power efficiency of electrochemical capacitors.</jats:p>