Temperature-Dependent Hydrothermal Synthesis of CdO Nanoparticles and its Analysis for Supercapacitor Application

CdO is an n-type semiconductor material having a lower bandgap having nearly 1.9eV.CdO has been prepared by a variety of methods and used for different applications.In this work, CdO nanoparticles were synthesized by using the hydrothermal method.Synthesized material was analyzed structurally and morphologically by XRD, FESEM, XPS, and FTIR.The temperature-dependent structural and morphological changes that occurred in the material and investigation have been conducted into their impact on the electrochemical supercapacitive performance of CdO thin films.The changes in microstructure are explained by a temperature-dependent growth mechanism model.Distinctive nanostructure orientations and the development of nanocrystalline CdO are revealed by X-ray diffraction analysis.Through the use of charge-discharge, electrochemical impedance spectroscopy, and cyclic voltammetry we have examined the electrochemical supercapacitive performance of CdO thin Films.The maximum specific capacitance of 359 F/g was evaluated at a scan rate of 5 mV/s in 1M KOH aqueous electrolyte.Asymmetric supercapacitive device study is also carried out.Furthermore, These CdO samples exhibit strong long-term cycling abilities in 1M KOH aqueous electrolyte solution.