چكيده به لاتين
MXenes, as derivatives of the MAX phase structures, have gained significant attention as a new class of two-dimensional materials due to their remarkable intrinsic properties. These materials, characterized by high electrical conductivity, excellent chemical stability and a large surface area are particularly suitable for various applications, especially in energy storage devices such as supercapacitors. These devices are emerging as advanced energy storage technologies due to their high power density, long cycle life and fast charge-discharge capabilities. In this study, nickel carbide MXene was synthesized and utilized as an active material for supercapacitors. Initially, the MAX phase of nickel carbide was synthesized, followed by the chemical removal (etching) of aluminum atoms to produce the Mxene structure. Subsequently, copper (II) oxide (CuO) was deposited on a composite substrate of nickel carbide Mxene and polyaniline (PANI) to synthesize a nickel carbide Mxene/PANI/CuO nanocomposite. In another composite, nickel carbide Mxene was functionalized using an imidazole-based ionic liquid.
Supercapacitor electrodes were fabricated using these nanocomposites, which exhibited desirable properties such as good stability, high charge-discharge rate, and excellent energy storage capacity. The synthesized nanocomposites were characterized using Fourier-transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). Finally, the electrochemical performance of the composites was evaluated using cyclic voltammetry, galvanostatic charge-discharge testing and electrochemical impedance spectroscopy. The Ni-Mxene/PANI/CuO and Ni-Mxene/Im-IL nanocomposites demonstrated specific capacities of 1017 F/g and 592.74 F/g, respectively, at a current density of 1 A/g.
