Diffusion and capacitive controlled surfactant assisted vanadium-doped nickel hydroxide nanostructures for supercapacitor applications

Abstract

To increase storage capacity of supercapacitor nanomaterials plays an important role. By using different surfactants, it is possible to synthesize nanomaterials. Surfactants have power overgrowth and agglomeration of particles, which control the dimension of the materials. Doping of vanadium contributes to improvement the electric conductivity of nickel hydroxide. Compared with those of cetyltrimethylammonium bromide (CTAB) and ammonium fluoride (NH₄F), the restricted specific capacitance of these materials increases due to the use of the sodium lauryl sulphate (SDS) surfactant. The maximum specific capacitance was from a GCD of 2150 F g⁻¹ (1825 mF cm⁻²) at 3 mA cm⁻² and from a CV of 1844 F g⁻¹ at a 10 mV s⁻¹ scan rate. After 1000 charge‒discharge cycles, the electrode shows better stability at almost 95.5% at a scan rate of 100 mV s⁻¹. The diffusion and capacitive-controlled specific capacitance calculated with respect to different surfactants is a key aspect of this work.