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

Novel Co 3 O 4 /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 (Co 3 O 4 ) nanosheets exhibiting dangling lattice fringe-spacing. From XRD, average crystallite size of Co 3 O 4 /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 Co 3 O 4 nanosheet onto MXene surfaces demonstrated by EIS resulting electron transfer rate constant value about 7.098 × 10 −10 cms −1 in 0.1 M H 2 SO 4 acidic electrolyte supporting maximum capacitance of 948.9 F g −1 in 0.1 M H 2 SO 4 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.