Tailoring of Nanomesh Arrays with Venus Flytrap-Like NiCoP/NiCo-LDH for Supercapacitors

Abstract

The superior electrochemical functionality of supercapacitor electrodes is heavily reliant on the strategic design of nanostructures that effectively integrate diverse active materials. In this study, a facile hydrothermal method was investigated for easy synthesis of Venus flytrap-like NiCoP using nickel foam (NF) as both the substrate and the nickel source. Furthermore, the electrochemical deposition of NiCo-LDH onto the 3D NiCoP nanomeshes was delved into, creating a hybrid nanomaterial with enhanced energy storage capability of 1675 F/g (1 A/g). This innovative combination of conductive NiCoP as a core and redoxactive NiCo-LDH as a shell forms a smart heteronetwork that boosts surface area, enhances the presence of the redox-active sites, and improves ion/electron transport for faradaic reactions. The NiCoP/NiCo-2//PC supercapacitor boasts a remarkable energy density of 30.96 Wh/kg and a power density of 783.90 W/kg and displays favorable capacitance retention rate characteristics (73.5%, from 600 to 10,000 cycles). This effective and simple technique for transforming a high-performance anode on a nickel foam substrate could significantly improve their applicability for large-scale use as well as provide useful knowledge for creating self-supporting substrates for energy storage and conversion through other manufacturing processes.