Enhanced performance of PbO nanoparticles and PbO-CdO and PbO-ZnO nanocomposites for supercapacitor application

In the present work, Lead Oxide (PbO) nanoparticles and the composite form of PbO with CdO and ZnO were prepared by the wet chemical method. The crystal structure, optical absorption and functional groups of the prepared materials were studied. The electrochemical studies indicate that PbO-ZnO nanocomposites possess the highest specific capacitance of 408F/g compared with that of PbO nanoparticles and the PbO-CdO nanocomposites. With promising structural, optical and electrochemical properties, these nanocomposites can be effectively used for as double layer capacitors for energy storage applications. •PbO, PbO-CdO and PbO-ZnO were prepared by wet-chemical method.•Absorption spectra, using UV-NIR spectroscopy, for nanocomposites shows red shift.•BET Surface area of PbO-CdO and PbO-ZnO shows mesoporous structures.•PbO-CdO and PbO-ZnO have higher specific capacitance in comparison with PbO.•Ion diffusion in PbO-CdO and PbO-ZnO is high when current density decreases.