It is crucial to enhance the electrical conductivity and cycling stability of transition metal sulfides for high performance of supercapacitors. Herein, Nickel disulfide nanoparticles composite carbon nanotubes (NiS2@ CNTs) were fabricated from Ni-MOF precursor after carbonizing and vulcanizing processes. It is found that the NiS2 nanoparticles and CNTs of NiS2@ CNTs composites, which are synthesized under the mass ratio of 1 ∶ 6 between Ni@ CNTs and sublimated sulfur, presenting uniform dispersion and large specific surface area, providing abundant reactive sites, rapid ionic diffusion and strong electron transport efficiency for the electrochemical reaction. The testsshow that the specific capacitance at NiS2@ CNTs reached 568.0 F/ g (0.5 A/ g). By using NiS2@ CNTs and activated carbon (AC) aspositive and negative electrodes, NiS2@ CNTs/ / AC device exhibites the maximum output energy density and power density of 15.6 Wh/ kgand 3 207 W/ kg, and displays as high as 98.1% of capacitance retention and 99.7% of coulombic efficiency after 5 000 cycles, showingthat the electrode is expected to achieve long-term recycling and has a good practical application potential.