CdS-CoFe₂O₄@Reduced Graphene\nOxide Nanohybrid: An Excellent Electrode Material for Supercapacitor\nApplications

Abstract

CoFe₂O₄ nanospheres\nornamented CdS nanorods\nwere successfully assembled over the reduced graphene oxide nanosheets.\nSuch hierarchical morphology established by field emission scanning\nelectron microscopy and transmission electron microscopy studies,\nwith high surface area offered a high specific capacitance of 1487\nF g^–1 at a current density of 5 A g^–1 owing to fast diffusion of ions, facile transportation of electrons,\nand great synergism between the components, which led to reversible\nredox reactions. Furthermore, the electrode material has specific\ncapacitance retention of 78% up to 5000 cycles, thus demonstrating\nits good reversibility and cyclic stability. The resulting CdS-CoFe₂O₄@reduced graphene oxide nanohybrid can deliver\nexcellent electrochemical performance and can be a potential candidate\nfor supercapacitor application.