Comprehensive characterization of a Mn0.1Mg0.9Fe2O4/CeO2/MgFe2O4 nanocomposite for high-performance supercapacitor applications

Abstract

Metal oxide nanocomposites have grown in popularity in the field of electrochemical devices due to their numerous advantages, such as a large active surface area and high chemical stability. However, it is crucial to emphasize that the structural properties of these metal oxide nanocomposites are crucial in molding their electrochemical performance. Using solvothermal reflux and auto-combustion techniques (Mn0.1Mg0.9Fe2O4/CeO2/MgFe2O4) comprising Mn0.1Mg0.9Fe2O4, CeO2, and MgFe2O4 was successfully produced. This nanocomposite was used to construct high-performance electrochemical energy storage devices, notably battery-type applications. This nanocomposite crystal structure, morphology, and elemental composition were thoroughly examined. The electrochemical performance of the synthesized nanocomposite was examined using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using a 6 M KOH electrolyte solution to acquire a thorough grasp of its properties. When tested at a current density of 1 A/g, the composite electrode demonstrated an impressive specific capacity (Cs) of 368.7 C/g. Even after 5000 charge-discharge cycles, the Mn0.1Mg0.9Fe2O4/CeO2/MgFe2O4 nanocomposite electrode retained 93 % of its capacity retention. These findings definitively establish the Mn0.1Mg0.9Fe2O4/CeO2/MgFe2O4 nanocomposite as a top choice for energy storage systems.