g-C3N4 modified flower-like CuCo2O4 array on nickel foam without binder for high-performance supercapacitors

Abstract

This study investigates the impact of integrating g-C₃N₄ into CuCo₂O₄ electrodes on electrochemical performance working as binder-free electrodes. Flower-like CuCo₂O₄ nanostructures on nickel foam are decorated with few-layer g-C₃N₄ using a secondary hydrothermal process. The hierarchical g-C₃N₄/CuCo₂O₄ nanoflower electrode demonstrates a specific capacity of 247.5 mA h g⁻¹ at a current density of 1 A g⁻¹, while maintaining a capacity of 87.0 mA h g⁻¹ at a heightened current density of 5 A g⁻¹. Notably, this electrode exhibited remarkable durability, retaining 98% of its capacity after 1000 cycles. The g-C₃N₄/CuCo₂O₄ heterostructure shows promise for high-performance energy storage devices.