Fabrication of hybrid cauliflower-like nanoarchitectures by in situ grown ZnO nanoparticals on VS₂ ultrathin nanosheets for high performance supercapacitors

A novel hybrid nanocomposite consisting of ZnO nanosphere wrapped with VS₂ ultrathin nanosheets (cauliflower-like nanoarchitecture) was successfully fabricated by a facile wet chemical method. ZnO nanospheres grew in situ on VS₂ nanosheets, which effectively restrained the restack of VS₂ nanosheets, leading three-dimensional (3D) nanostructure. With good electrical conductivity, big space void and high specific surface area, the as-prepared ZnO/VS₂ nanocomposite presents great potential as high-performance supercapacitor electrode. Detailed electrochemical characterizations show the intriguing structure exhibits extremely excellent supercapacitors performance including high specific capacitance (2695.7 F g^-1 at a current density of 1 A g^-1) and long term cycling stability (92.7% capacitance retention after 5000 cycles). This study provides the basis for the application of VS₂-based hybrid nanoarchitectures in energy storage and other electrochemical devices.