Abstract

In view of the unique magnetic characteristics of the ferrites, inverse spinel cobalt ferrite/MXene nanocomposites (Co1-xNixFe2O4/MXene NCs) have garnered significant attention. These vital characteristics make Co1-xNixFe2O4/MXene NCs an ideal material for supercapacitor application. To synthesize Co1-xNixFe2O4/MXene NCs, a simple and cost-effective low-temperature co-precipitation approach was used, and samples were synthesized at different nickel concentrations (x = 0.03, 0.05, 0.07, 0.10) further integrated with MXene. Several characterization studies were used to investigate their crystallinity, morphology, and electrochemistry using different techniques such as X-ray powder diffraction (XRD), Fourier transform infrared spectrum (FT-IR), elemental composition analysis (X-ray photoelectron spectra - XPS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Co1-xNixFe2O4 (x = 0.10) with MXene exhibited smaller crystallite size compared to other produced samples. The results showed that increase in nickel concentration decreases the crystallite size and lattice constant. The FT-IR spectra showed two strong absorption bands near 560 cm?1 (v1) and 400 cm?1 (?2). SEM was used to corroborate the shape of the cubically spherical structure. The electrochemical behaviour for the produced samples were investigated using cyclic voltammetry (CV) with a electrolyte solution of 1 M KOH. The voltage has been constrained to 0.0 volts to 0.5 volts, with potential scan speeds ranging 5, 10, 20, 25, 50, and 75 mV/s. A cyclic voltametric investigation found that the nickel doped cobalt ferrite with MXene incorporation enhanced the specific capacitance over Co1-xNixFe2O4 (x = 0.10). The specific capacitance of nickel-doped cobalt ferrite (x = 0.10) and (x = 0.10/MXene) samples were 361C g?1 and 367C g?1 respectively. © 2025 Elsevier B.V.