g-CN modified flower-like CuCoO array on nickel foam without binder for high-performance supercapacitors.

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