Enhanced Electrochemical Performance of Zn-Co@Mgco2o4 Nanosheet Electrodes in Supercapacitors

Abstract

The demand for high-performance eletrochemical supercapacitors is rapidly increasing due to advancements in the electronics sector, yet achieving optimal performance in symmetric configurations remains challenging due to the limitations in specific capacitance and rate capability of conventional electrode materials. This study explores the potential of Zn-Co@MgCo2O4 nanosheet electrodes, emphasizing their interfacial interactions and synergistic effects to enhance electrochemical performance. Through systematic experimentation, we evaluated these nanosheets against traditional Co@MgCo2O4 nanorods, revealing that the Zn-Co@MgCo2O4 electrodes exhibited an exceptional specific capacitance of 3972 Fg⁻¹ at a current density of 2 Ag⁻¹, significantly surpassing the 1217.74 Fg⁻¹ achieved by the nanorods. Furthermore, these nanosheets demonstrated a remarkable capacitance retention rate of 83.1% after 10,000 operational cycles, highlighting the vital role of electrode material selection in optimizing energy storage capabilities. This research underscores the superior electrochemical properties of Zn-Co@MgCo2O4 nanosheets, positioning them as promising candidates for the next generation of high-performance energy storage devices.

Keywords: Zn-Co@MgCo2O4, Energy Storage, supercapacitors, synergistic effects, Capacitive and Diffusion distribution