Facile synthesis of highly porous hierarchical ZnO nano-flowers array over graphene oxide nanocomposite for high performance Supercapacitor applications

Abstract

Globalization, shifts in mobility, and digitization all contribute to an increase in energy use. Complex networks are now able to provide electricity at anytime and anywhere. However, there is a cost associated with this rise in energy use. Right present, there is an urgent energy demand for supercapacitors of high energy density. This study used the co-precipitation approach to synthesis hierarchical ZnO/GO in the form of flowers. The selection of ZnO/GO were based on its substantial electroactive surface area, shape resembling flowers, and effective pathways for electron transport and ion diffusion within the constructed hierarchical arrays. At 1 A/g, the GO-coated ZnO exhibits a capacitance of around 683.21 F/g. Fundamental investigations have proven that a synergistic impact between the hierarchical ZnO/GO nano-flower and GO nano-sheets helps to large surface area & outstanding transport characteristics. As a result, when used as an electrode in supercapacitors has more active sites and intercalation of ions, ZnO/GO hierarchical structures have shown an exceptional specific capacitance of 683.21 F/g at 1 A/g. Besides, it demonstrated excellent stability, holding onto its 74.047 % capacitance at 1 A/g even after 5000 cycles. These excellent electrochemical outcomes suggest that ZnO/GO is a good choice for energy storage uses.