<p>The use of two-dimensional (2D) nanomaterials for energy storage systems such as batteries and supercapacitors is a rapidly growing area of research interest. In this work, a facile successive ionic layer adsorption and reaction (SILAR) approach was used to create two-dimensional (2D) CeO₂@Co₃O₄/MXene electrodes for supercapacitor applications. The increasing scholarly interest in supercapacitors in recent years is in response to the global energy crisis caused by the exponential growth in the world’s population, requiring technologies capable of sustaining high energy consumption. Electrodes based on MXenes (Ti₃C₂T_x, where x stands for a functional group such as hydrogen [H⁺], hydroxyl [OH⁻], or chlorine [Cl⁻]) have desirable properties including a large surface area, excellent chemical stability, and high electrical conductivity, which position them as promising tools for supercapacitor applications. The properties of these fabricated electrodes were assessed using x-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, UV-visible spectroscopy, and electrochemical analysis. The CeO₂@Co₃O₄/MXene composite electrode, with a Ce/Co ratio of 1:2/MXene, achieved specific capacitance of 1660&#xa0;F g⁻¹ with current density of 0.5&#xa0;A g⁻¹ in a three-electrode system. Furthermore, it retained 84.98% of its initial capacity after 10,000 complete cycles.</p>