Enhanced electrochemical properties of PbO-rGO nanocomposite prepared by wet chemical method for supercapacitor applications

Abstract

The supercapacitor is a future energy device because of its higher power density and outstanding cyclic stability with a quick charge and discharge process. Supercapacitors have a lower energy density than regular batteries. The electrochemical characteristic of supercapacitors is strongly depend on the electrode materials. The nanostructured electrode materials continue to be a main focus of supercapacitor research. The considered electrode materials, such as, Lead oxide (PbO) and reduced graphene oxide (rGO) have been widely used in supercapacitors due to their fascinating physicochemical properties. The PbrG was synthesized using the simple and cost-effective ultrasonic-assisted solution method. The prepared PbO and PbrG were examined in XRD, TEM and XPS. The XRD studies confirmed the presence of crystal structure in PbO and PbrG. The TEM images reveal the embellishment of PbO on the rGO sheets. The PbrG showed a higher specific capacitance (448 F/g) compared to PbO NANO (177 F/g) with better cycling stability until 5000 cycles and exhibited excellent conductivity due to the presence of rGO. These properties of PbrG ensures that this electrode material play a beneficial role in the energy storage applications.