Structural Optimization of CO3O4 Nanoparticles for Enhanced Energy-Storage Application

This study explores the synthesis of Co 3 O 4 nanoparticles via hydrothermal reactions of varying durations, aiming to optimize their structural and morphological characteristics for enhanced electrochemical performance. This paper reveals that prolonged hydrothermal reaction durations result in larger crystallite sizes, microporous morphologies, and enhanced electroactive surface areas, all contributing to improved charge storage capabilities. Moreover, the fine-tuned Co 3 O 4 nanoparticles-based electrode exhibits an impressive charge storage capacity of 936 C/g at 1 A/g. The hybrid device Co 3 O 4 @nickelfoam (NF)//graphite-mixed-activated-carbon (G-AC)@NF demonstrates an outstanding energy density of 71.35 Wh/kg at 750 W/kg and retains 78% of initial capacity after 5000 cycles, inferring its noteworthy cyclic stability. The results underscore the significance of optimizing synthesis processes by varying the reaction duration and highlight the candidacy of Co 3 O 4 -based electrodes in advancing energy storage technologies.