Synthesis of NiO/Fe2VO4 nano-hybrid structures via sonication induced approach for electrochemical energy storage in non-aqueous medium

Abstract

The design of scalable electrode materials has been the subject of research in energy storage for the advancement of the field. Herewith, we report on the metal oxide-based nanomaterials which were synthesized via facile sonication strategy and calcination by forming nano-hybrid material, NiO/Fe2VO4 (VFN) with a size of 5–10 nm. Activated carbon (AC) based nanocomposite electrodes with VFN (5–15 %) were produced having excellent physicochemical properties and better conductivity. The nanocomposite electrodes showed promising electrochemical performance with anhydrous glycerol/KOH gel electrolyte in supercapacitor application. The device with C/VFN15 electrodes in symmetric cell configuration displayed an excellent specific capacitance of 290 F g−1 at a current density of 1 A g−1 and specific energy of 40 Wh kg−1 at a power of 250 W kg−1 with non-aqueous electrolyte. The material exhibited promising cyclic stability up to 10,000 cycles retaining 90 % of its initial capacitance. In addition, a device with C/VFN15 was assembled and exhibited better performance and lighting a RGB LED under various angles.