Electrochemical characteristics of auto combustion synthesized nanocrystalline ZnLaFeO₃: an electrode material for energy storage supercapacitor application

A facile auto combustion approach has been developed for synthesizing nanocrystalline ZnLaFeO₃ material as the potential electrode for supercapacitor. The nanocrystalline electrode materials were characterized by X-ray diffraction analysis. It is performed to reveal the crystalline nature of the spinel phase of synthesized ZnLaFeO₃ material. The chemical environment and surface morphology of electrode materials were studied through the SEM-EDS technique. Further, the elemental distribution is analyzed from EDS mapping and distributed homogeneously in terms of ions such as Zn, Fe, La, and O across the grain boundaries. The electrochemical performance of the synthesized nanocrystalline ZnLaFeO₃ material was evaluated by cyclic voltammetry (CV), chronopotentiometry (CP), and electrochemical impedance spectroscopy (EIS). The specific capacitance of the obtained electrode was as high at a corresponding sweep rate in mV/s. The porous morphology of synthesized ZnLaFeO₃ material induced an extra charge at the interface leading to a synergistic effect and rapid electron and ion transport. Hence, this suggests its promising applications as an efficient electrode for electrochemical capacitors