Recent advancement in synthesizing techniques and fabrication of symmetric supercapacitor by pristine copper oxide nanomaterial as electrode has been described in this article. The electrode materials greatly influence the charge storage procedure in ultracapacitors. Due to variable oxidation states, non-toxic, easy availability, ease of synthesis route, and various morphologies, copper oxide is used for multiple applications, such as CO2 reduction, photoelectric sensors, electrode materials in electrochemical capacitors, and lithium-ion batteries. Copper oxide exists in distinct phases such as Cu2O, CuO, CuO2, Cu2O3, among them copper (I) (Cu2O) and copper (II) (CuO) oxides are most widely used. In the literature, various types of synthesis methods such as hydrothermal, sol–gel, co-precipitation, spray pyrolysis, rf magnetron sputtering. But in this article, we have described the synthesis of copper oxide using the sol–gel method. Copper oxide thin film has been deposited on the substrate to check electrochemical performance using various processes, including hydrothermal, oxidation, ultrasonic, chemical bath, and sol–gel deposition. Here, we have focused on electrodepositing using a potentiostatic mode.