PANI/WO3/MXene nanocomposite material for high-performance solid state symmetric supercapacitor

Polyaniline (PANI) and tungsten oxide (WO3) as electrode materials have limitations such as inferior stability and low capacitance. Herein, conductive 2D MXene is incorporated with PANI and WO3 using a two-step sonochemical and an oxidation polymerization approach to fabricate a hybrid symmetric supercapacitor. Various analytical techniques are used to investigate composite properties properly. The shape, crystal structure, and chemical content of pure MXene and WO3, and PANI/WO3/MXene (PWMx) composites were examined using FE-SEM, XRD, and FTIR, demonstrating the synthesis of WO3 nanoparticles, MXene nanosheets, and PWMx composites. The electrochemical measurements of the PWMx composite tested for cyclic voltammetry (CV) and galvanometric charge-discharge (GCD) in a 2-electrode symmetry supercapacitor showed that the PWMx exhibited a specific capacitance of 741 F/g at 1 A/g and an energy density of 65.7 Wh/kg. This research promotes a new method to synthesize PWMx composite for the next generation of electrode materials. [Display omitted] •A simple approach was used to synthesize PANI/WO3/MXene nanocomposite via in-situ chemical oxidation polymerization method.•PANI/WO3/MXene nanocomposite exhibits a maximum capacitance of 741 F/g at 1 A/g current density.•The symmetric supercapacitor illustrated a wider cell voltage of 1.6 V, a high energy density of 65.7 Wh/kg, and a power density of 797.9 W/kg.