Özet:

In this study, boron doped zinc oxide (ZnO:B) particles were produced by hydrothermal method using zinc nitrate hexahydrate (Zn(NO3)2.6H2O) precursor solution. In the synthesis of ZnO:B powders, boron was added at 5%, 10%, 15% and 20% by weight. Physical characterization of the produced ZnO:B structures was performed by X-ray diffraction (XRD) and scanning electron microscope (SEM). From the results of the analysis, it was observed that the ZnO:B particles crystallized in the hexagonal würtzide structure and their morphological structures were in the form of hexagonal rods. ZnO:B electrodes were prepared by mixing 10% poly tetra fluorine ethylene (PTFE), 20% conductive graphite and 70% ZnO:B powders to form an area of 1 cm2 on Ni foam. Capacitance measurements of ZnO:B electrodes were made by Iviumstat potentiostat/galvanostat cyclic voltammetry using a three-electrode arrangement. Measurements were made at room temperature and 6M KOH solution was used as the electrolyte liquid. The electrochemical properties of ZnO:B electrodes prepared at different boron ratios were investigated by examining the capacitance, impedance and charging/discharging curves. It was observed that the capacitance values of the produced ZnO:B electrodes increased systematically as the boron concentration increased. In addition, it has been observed that the electrode obtained by using 20% boron doped ZnO particles reaches the maximum specific capacitance value (29.41 F/g) and provides five-fold better performance than the undoped ZnO electrode.

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