Amorphous NiSe₂ was deposited on the carbon nanotubes (CNTs) networks by the pulsed laser deposition method forming the [email protected]@NiSe₂ composites. The [email protected]@NiSe₂ electrode exhibits a high specific capacitance of 696 F g⁻¹ at 2 A g⁻¹ and the specific capacitance retention of 74 % in the long life test. To evaluate the practicality of our electrode, we assembled the [email protected]@NiSe₂//[email protected] asymmetric supercapacitor using [email protected]@NiSe₂ as positive electrode and [email protected] as the negative electrode, which shows an energy density of 11.9 Wh kg⁻¹ at a power density of 242 W kg⁻¹. This work highlights the advantageous electrochemical performance of NiSe₂ film on CNTs, in which the highly conductive CNTs provide plentful electronic conduction channels and the NiSe₂ film exposures more active sites.