In present work, a facile spray pyrolysis technique has been applied for the synthesis of cadmium oxide (CdO) thin films at 673 K using aqueous cadmium acetate solution and reported. Primarily, as-synthesized CdO thin films are characterized for their structure and surface morphology corroborations and afterward used for energy storage applications. X-ray diffraction and X-ray photoelectron spectroscopy analysis supports to the formation of cubic crystalline phase of CdO. A homogeneous network of elongated rod-type surface morphology of CdO films was confirmed through scanning electron microscopy analysis. In addition, hydrophilic character of CdO thin film was corroborated through contact angle measurement. Electrochemical properties of as-synthesized CdO thin film electrode was studied in various aqueous electrolytes by means of cyclic voltammetry, charge discharge, and impedance spectroscopy techniques and discussed. Electrochemical studies of CdO thin film electrode demonstrates a maximum specific capacitance of 344 F/g at 5 mV/s scan rate in 2 M KOH electrolyte.