Renewable energy resources do not produce any environmental detriment. Therefore, recently, utmost utilization of sustainable and renewable energy resources has become the prime focus of major world power and scientific research community. As a result, demand of the development of efficient energy storage devices (fuel cells, supercapacitors and Li-ion batteries) has increased extensively. In this concern, electrochemical performance of various nanocomposite materials has been tested and concluded that the morphology and the synergistic effect of constituents in the nanocomposites are the two major factors that effectively governs the physical, chemical and electrochemical properties of the composite. Herein, we report the enhanced electrochemical performance of hollow ZnO nanorods/rGO nanocomposites synthesized via reflux method. The electrochemical properties of the synthesized samples have been investigated in the conventional three electrode configuration in a freshly prepared 0.5 M Na2SO4 electrolyte at room temperature. Hollow ZnO nanorods sample, exhibits specific capacitance of ~ 100 Fg-1 at the current density of 0.25 Ag-1. The addition of rGO significantly improves the electrochemical performance of the ZnO nanorods/rGO nanocomposite, which can be assigned to the higher conductivity of the nanocomposite and the synergistic effect of the constituents. The structural analysis, morphological studies, thermal stability and specific surface area of nanocomposite have been investigated via XRD, FE-SEM, TGA, TEM and BET surface area analyzer. The electrochemical measurements have been carried out using cyclic voltammetry (CV), galvanostatic charge-discharge cycling (GCD) and electrochemical impedance spectroscopy (EIS).