One-Dimensional\nBiFeO₃ Nanowire-Reduced Graphene Oxide Nanocomposite as\nExcellent Supercapacitor Electrode Material

Abstract

In\nthis work, we have reported a nanocomposite, composed of a BiFeO₃ nanowire and reduced graphene oxide (BFO-RGO), as an electrode\nmaterial for a high-performance supercapacitor. A facile hydrothermal\nmethod was employed to prepare BFO-RGO nanocomposite. The electrochemical\nmeasurements were performed by cyclic voltammetry, galvanostatic charge/discharge\nmeasurements, and electrochemical impedance spectroscopy. The specific\ncapacitance of the BFO-RGO nanocomposite was 928.43 F g^–1 at current density 5 A g^–1, which is superior\nto that of pure BiFeO₃. Additionally, this nanocomposite\nshows good cyclic stability, and ∼87.51% of specific capacitance\nis retained up to 1000 cycles. It also exhibits a high charge density\nof 18.62 W h kg^–1 when the power density is 950\nW kg^–1. These attractive results suggest the potential\nof BiFeO₃ nanowire-RGO nanocomposite as an active material\nfor the construction of a high-performance supercapacitor electrode.\nTo the best of our knowledge, this is the first time the application\nof BiFeO₃ nanowire-RGO nanocomposite as a supercapacitor\nhas been reported.