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

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 electro-chemical 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.

Automated summary

In this research, metal oxide-based nanomaterials, NiO/Fe2VO4 (VFN), were synthesized via a facile sonication strategy and calcination, forming nano-hybrid materials with a size of 5-10 nm. Activated carbon (AC) based nanocomposite electrodes with VFN (5-15%) exhibited excellent physicochemical properties and conductivity. These nanocomposite electrodes showed promising electrochemical performance in supercapacitor applications using anhydrous glycerol/KOH gel electrolyte. The device with C/VFN15 electrodes displayed an excellent specific capacitance of 290 F g-1 at a current density of 1 A g-1 and a specific energy of 40 Wh kg-1 at a power of 250 W kg-1 with non-aqueous electrolyte. The material also exhibited promising cyclic stability and could retain 90% of its initial capacitance after 10,000 cycles. Additionally, a device with C/VFN15 showed better performance and could light up a RGB LED under various angles.