Abstract: (4359 Views)
In this study, zinc chloride (ZnCl) 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 were 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.
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- RGO/ZnO:B composite materials were produced using the hydrothermal method.
- SEM images shows, the RGO/ZnO:B composites obtained consist of hexagonal plate and hexagonal rod mixtures.
- The structure of the RGO/ZnO:B composites was characterized as a wurtzite ZnO, a simonkolleite zinc hydroxide and RGO phase mixtures from the XRD spectrum.
- The electrochemical properties of the Graphite/PTFE/RGO/ZnO:B electrodes were examined using capacitance, impedance and charging/discharging curves.
- The performance of the capacitance increased four-fold with a 20% boron concentration.
- Electrodes with high boron concentration showed longer cycle performance.
Type of Study:
Research Paper |
Subject:
Composites