The Effect of Boron Reinforced on the Supercapacitor Performance of RGO/ZnO:B Composite Electrodes

In this study, zinc chloride (ZnCl2) was used as a precursor chemical to form boron-reinforced zinc oxide (ZnO: B) particles. The supercapacitor performance of the reduced graphene oxide/boron reinforced zinc oxide (RGO/ZnO: B) composite electrodes produced by hydrothermal methods and the impact of different boron doping ratios on the capacitance, were both examined. The characterization of the RGO/ZnO: B composites containing 5%, 10%, 15%, and 20% boron by weight was performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The capacitance measurements of the electrodes produced were conducted in a 6 M KOH aqueous solution with a typical three-electrode setup using Iviumstat potentiostat/galvanostatic cyclic voltammetry. The specific capacitance value of the 20% reinforced RGO/ZnO: B composite electrode was 155.88 F/g, while that of the RGO/ZnO composite electrode was 36.37 F/g. According to this result, the capacitance increased four-fold with a 20% boron doping concentration. Moreover, a longer cycle performance was observed for the RGO/ZnO: B electrodes with higher boron doping concentrations.