We established the chain-like NiO nanoarchitecture through CTAB assisted sonochemical synthesis process, and it is used for supercapacitor electrode application. The factors such as CTAB and ultrasound irradiation were generated the chain-like NiO crystals. The crystalline nature, internal structure, and morphological properties were characterized with X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), respectively. The NiO crystals exhibit the pseudocapacitive charge storage mechanism and provide the specific capacitance of 562 at a scan rate of 5 mV s-1 with good rate capability. As well, the chain-like NiO crystal retains 96 % of the initial capacitance after 3,000 cycles at a scan rate of 100 mV s-1, displaying outstanding cycle stability. The easily synthesized, chain-like nanostructured, and high-performance NiO material render significant interest to sustenance for advanced energy storage devices.