Hydrothermally grown net-like interconnected nanoflakes and microflowers of vanadium oxide for supercapacitive applications

The net-like interconnected nanoflakes of vanadium oxide are grown on flexible stainless-steel substrate by simple hydrothermal method. Scanning electron microscopy (SEM) studies represent the hierarchical microflowers grown on the net-like nanoflakes’ structure exhibiting the availability of large surface area. The structural, compositional, and elemental mapping analysis are done by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and electron dispersive X-ray spectroscopy (EDX), respectively. This confirms the presence of vanadium pentoxide phase of the material. Mesoporous structure is confirmed from Brunauer-Emmett-Teller (BET). The mesoporous vanadium oxide has exhibited the specific capacitance of 500 F/g at 0.01A/g current density in 1 M LiCl \({O}_{4}\) $O_4$ electrolyte. The specific capacitance shows 93% retention at 4000 cycles. The internal resistance (Rs) of the electrode is only 4.23 Ω.