Simple construction of gadolinium cobaltite perovskite (GdCoO3): Unveiling the dynamic electrode potential for pseudocapacitors

Abstract

BackgroundThe intermittent nature of renewable energy resources has led to an ongoing mismatch between energy demands and supply in modern societies. To address this issue, the design of well-defined nanostructures with unique physicochemical nature, has emerged as a promising solution. In this regard, perovskite (ABO3) nanostructured electrode materials have shown great potential in enhancing electrochemical performance. MethodsA simple co-precipitation technique was utilized to synthesize perovskite phase gadolinium-based binary metal oxide, i.e., GdCoO3. The obtained physiochemical characterization data revealed that the GdCoO3 electrode material possessed a high surface area that facilitates the diffusion of ions and enhances its specific capacitance. Significant findingsExtensive electrochemical characterization techniques were used (cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charging and discharging (GCD)) to analyze the electrochemical properties of the electrode material in this study. The charge storage mechanism of GdCoO3 was determined to be diffusion-controlled. When tested in an aqueous electrolyte (3 M KOH), GdCoO3 nano-electrode exhibited an excellent specific capacitance (519 F g–1) by a current density (1 A g–1). Furthermore, it demonstrates a significant capacitance retention rate (CRR) of 84.9 % subsequently 5000 cycles indicating its potential for long-term stability. The fabricated battery-type electrode holds promise in various applications including electric motors, flexible electronics, and energy storage devices.