Abstract: Co-Ni-S/MXene composite electrode material was successfully synthesized through a two-step hydrothermal method, combining Co-Ni-S with Mo₂TiC₂ MXene. The folded MXene exhibited uniform coating on the surface of the Co-Ni-S honeycomb sheet. The electrochemical performance of the Co-Ni-S/MXene composite electrode material demonstrated higher specific capacitance and rate performance, as well as lower charge transfer and ion diffusion resistance compared to pure Co-Ni-S due to the intrinsic high conductivity of MXene. Furthermore, Co-Ni-S/MXene displayed excellent stability and coulombic efficiency, making it an excellent candidate for supercapacitor applications.