Transition metal and rare earth selenides have gained considerable attention in energy storage devices owing to their exclusive features. In this study, a hierarchical electrodeposition process has been employed for the construction of NiCo nanosphere@NiCo₂Se₄ cauliflower decorated with La₂Se₃ nanowarm on the nickel foam as the positive electrode for hybrid supercapacitors. The results of SEM analysis showed that La₂Se₃ nanowarms had grown on NiCo NS@NiCo₂Se₄ with a core@shell structure. The fabricated electrode showed a high specific capacitance of 820C g⁻¹ at 2 A g⁻¹ and retained its specific capacitance (70 %) even at a high current density (20 A g⁻¹) with excellent durability (93 % after 5000 cycles). Finally, an asymmetric supercapacitor device has been fabricated with NiCo NS@NiCo₂Se₄/La₂Se₃ and the activated carbon electrodes as the cathode and anode, respectively. The hybrid supercapacitor showed an excellent energy density of 44.95 W h kg⁻¹, a power density of 622 W kg⁻¹, and preeminent cycling stability with 89 % retention over 5000 charge-discharge cycles. The as-made hybrid supercapacitor appears as a high-performance storage device for practical applications.