Growth of Nickel Vanadium Layered Hydroxide (NiV-LDH) On Nickel Cobalt Metal Organic Framework (NiCoMOF) For High-Performance Supercapacitors

Supercapacitors improved electrochemical characteristics, especially their high specific capacitance, rapid charge–discharge capability, and long cycling life. Positioned between batteries and conventional capacitors, supercapacitors offer an intermediate solution with relation to power density and energy. In this work, a NiV-LDH@NiCo-MOF composite was synthesized using a hydrothermal method and characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy, and scanning electron microscopy (SEM). Metal-organic frameworks (MOFs) are crystalline porous materials made up of metal ions or clusters linked together by organic molecules. They possess tunable porosity, redox-active, and high surface areas, are appropriate for use as sacrificial templates or functional linkers. But, their utilization in energy storage is constrained by extensive poor conductivity, diffusion routes, and few exposed active sites. However, their practical use is often limited by poor electrical conductivity, long ion-diffusion pathways, and insufficient exposure of active sites. To overcome these limitations, hybrid architecture was constructed through the direct growth and interconnection of MOF nanoparticles and layered double hydroxide (LDH) nanosheets, resulting in a robust structure in which the LDH nanosheets are firmly anchored to the MOF framework. The composite NiV-LDH@NiCo-MOF showed an impressive specific capacitance of 1424 Fg − 1 at a current density of 1 Ag − 1.