Revolutionizing Supercapacitors with Next-Level Performance: Developing an Innovative MXene-Based Cobalt Oxide Composite Electrode for Enhanced Supercapacitive Energy Storage Applications

Abstract

Novel Co3O4/MXene nanocomposite electrode has been synthesized through an innovative co-precipitation method. Nanocomposite has a structure similar to a layered framework, with the cobalt-cobalt (Co3O4) nanosheets exhibiting dangling lattice fringe-spacing. From XRD, average crystallite size of Co3O4/MXene nanocomposite about 4.64 nm obtained. SEM reveals average grain size of 1.98 nm whereas EDS confirms presence of all constituent elements within nanocomposite. Reduced bandgap comparable to MXene evident of semiconducting nature whereas electrostatics of Co3O4 nanosheet onto MXene surfaces demonstrated by EIS resulting electron transfer rate constant value about 7.098 × 10−10 cms−1 in 0.1 M H2SO4 acidic electrolyte supporting maximum capacitance of 948.9 F g−1 in 0.1 M H2SO4 at 10 mV s−1 scan rate. These all findings suggested that this research not only advances electrode engineering but also empowers various energy storage applications from portable electronics to renewable energy systems.