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

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.