Asymmetric Nanocomposite Supercapacitors Synthesis Fabrication and Electrochemical Properties

Abstract

improvements in the performance and scalability of supercapacitors, making it as a promising technology for a wide range of applications. The presents studies are mainly focused on the synthesis and characterization of different composite electrode materials for supercapacitor applications as single electrode may not be in position to cover all requirements essential for commercial practices. At first, a 3D sponge was used as a macroporous skeleton for the synthesis of PPy, Bi2O3, and PPyatBi2O3 electrode materials. The Bi2O3atPPy electrode showed a specific capacitance of 471.2 F/g at 2 A/g and delivered an energy density of 12 Wh/kg at a power density of 1363.6 W/kg in an asymmetric supercapacitor configuration. In the second study, a Bi2O3atMnO2 composite electrode material was prepared on a dry waste battery GR using a cost-effective and eco-friendly SILAR chemical process. The composite electrode material showed a specific capacitance of 350 F/g at 10 A/g and delivered an energy density of 28 Wh/kg at a power density of 1395 W/kg in a symmetric supercapacitor configuration. newlineAbstract newlineiv newlineIn the third study, the Sb2O3-Bi2O3 composite electrode was synthesized using SILAR method. The symmetric Sb2O3-Bi2O3//Sb2O3-Bi2O3 supercapacitor endowed a specific capacitance of 528 F/g at 5A/g and delivered an energy density of 117 Wh/kg at newline