In this study, we report the facile microwave synthesis of pure ZnCo2O4 and ZnO/ZnCo2O4 heterostructures and their electrochemical performances. In order to identify the phase, X-ray diffraction (XRD) measurement was carried out and the result confirm the cubic structure ZnCo2O4. In addition to ZnCo2O4, peaks of ZnO were identified in the spectrum which confirms the formation of heterostructures. The morphology of the prepared materials was observed by SEM and TEM analysis. The surface composition of the heterostructures was characterized by XPS technique. Cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) studies have been performed with 1 M KOH as electrolyte on the synthesised materials. The higher specific capacitance of 216 F g-1 at a current density of 1 A g-1 and an energy density of 4.8 Wh kg-1 at a power density of 200 W kg-1 was observed for ZnO/ZnCo2O4 heterostructures