Development of Mn-doped SmCoO3 electrode material for supercapacitor application

Abstract

The rapid use of fossil fuels has resulted in a reduction of energy reserves and raised environmental pollution. Nonetheless, quickly developing alternate, sustainable energy sources and storage technologies is crucial. The present study describes the hydrothermal synthesis to produce pure SmCoO₃ and Mn-doped SmCoO₃for supercapacitor application. To determine the electrochemical capabilities, morphology and structure of SmCoO₃ using physical and electrochemical techniques were studied before and after manganese doping. The specific capacitance of Mn-doped SmCoO₃ and pure SmCoO₃ are 1385.3 F/g and 633.7 F/g as well as energy density is 45.9 Wh/kg and 20.6 Wh/kg at 1 A/g, respectively. These findings illustrate that Mn-doped SmCoO₃ is a preferred electrode material for supercapacitors. Electrochemical impedance spectroscopy suggests that the doped material has values of 0.10 Ω and 0.60 Ω for solution and charger transfer resistance, correspondingly and even after the 5000th cycles, the electrode material demonstrated cycling stability. In conclusion, the material’s electrochemical performance confirms its intriguing qualities as an energy storage supercapacitor. Therefore, Mn-doped SmCoO₃ has been presented as material for electrodes for utilization in next-generation supercapacitors.