Reduced Graphene Oxide Decorated by Zinc Oxide Nanoparticles for High-Performance Supercapacitors

The RGO/ZnO nanocomposite material was created using an easy, low-cost hydrothermal process. Due to their excellent mechanical stability and electrical conductivity, metal oxide nanoparticles demonstrated good pseudo-capacitance and electrochemical stability. The cycle's reversibility has been enhanced in the 0–0.6 V potential range. At a current density of 4 Ag−1, the RGO/ZnO nanocomposite showed a specific capacitance of 123 F/g. Both in cyclic voltammetry and charge and discharge cycles, the materials maintained their cyclic stability for up to 500 cycles. The insertion of RGO in the ZnO moiety was found to boost the conductivity and stability of ZnO nanoparticles. The charge transfer property was improved and the RGO/ZnO nanocomposite material demonstrated excellent reversible and symmetrical charge–discharge current.