2D MXene incorporated nickel hydroxide composite for supercapacitor application

In the current investigation, we report the successful synthesis of a novel Ni(OH)₂/Ti₃C₂T_x MXene nanocomposite via a microwave-assisted technique, specifically tailored for supercapacitor applications. The inherent semiconductor properties of nickel hydroxide often impede its electrochemical capabilities; however, the integration with a conductive host material can significantly ameliorate this limitation. To this end, Titanium Carbide (Ti₃C₂T_x) was incorporated during the Nickel Hydroxide (Ni(OH)₂) synthesis process, resulting in the in-situ formation of Ni(OH)₂ nanosheets homogeneously anchored onto the MXene sheets. The electrode derived from this nanocomposite showcased exceptional electrochemical attributes. Notably, it achieved a remarkable-specific capacitance peak of 675 Fg⁻¹ at a current density of 2 Ag⁻¹, coupled with outstanding stability and cyclability metrics. Furthermore, the asymmetric supercapacitor engineered with the synthesized material attained an energy density of 9.25 Whkg⁻¹ and a power density of 3.2 kWkg⁻¹. This device not only demonstrated superior rate capability but also sustained cyclic stability. The empirical evidence gathered from these experiments underscores the promising potential of metal hydroxide/MXene nanocomposites in advancing supercapacitor technology.