Performance regulation and mechanism analysis of LaFeO3 nanostructured electrode materials supercapacitors based on doping engineering

Abstract

Electrochemical analysis indicates that when the current density is 1 A·g⁻¹, the specific capacitance of the La_0.85Ca_0.15FeO₃ electrode reaches 451 F/g. This specific value is 2.7 times greater than the specific capacitance of the undoped LaFeO₃ electrode. Furthermore, when the power density reaches 1000 W·kg⁻¹, the energy density of the symmetrical supercapacitor prepared with La_0.85Ca_0.15FeO₃ reaches 23 Wh·kg⁻¹. In addition, it also features excellent cycling stability. After 6000 charge and discharge cycles, it still maintains 95 % of the starting capacitance. This study introduces an effective doping engineering method, aiming to promote the development of electrode materials for energy storage applications.