Metal–Organic Framework (MOF)-Assisted Construction of Core–Shell Nanoflower-like CuO/CF@NiCoMn–OH for High-Performance Supercapacitor

Abstract

Urgent requests for environmentally friendly clean energy and the development of modern electronic products have resulted in fervent research on novel energy storage technologies, particularly for supercapacitors. But supercapacitors suffer from low energy densities, restricting their development. In order to obtain high performance supercapacitors with a high energy density and power density, the indispensable factor is designing electrode materials with excellent capacitive performance. We have successfully prepared innovative materials and unique structures to apply in high-performance supercapacitors. The nanowire is good for making close contact with the electrolyte for fast ion diffusion, and the nanoflower sheet enables shortening the electron convey route and provides a number of reaction active sites. Herein, we use copper foam (CF) as the substrate, and binder-free core–shell nanoflower-like CuO/CF@NiCoMn–OH is designed as a battery-style positive electrode. Benefiting from the advantages of a metal–organic framework (MOF)-assisted growth strategy and simple hydrothermal dynamics, the prepared optimizing electrode structure delivers a distinguished specific capacity of 26.8 F cm–2 at 8 mA cm–2 (3356 F g–1 at 1 A g–1). The assembled CuO/CF@NiCoMn–OH//AC exhibits a high energy density of 37.28 W h kg–1 and a power density of 170 W kg–1, under a potential window of 1.5 V. This work implies that MOF-assisted construction of core–shell nanoflower-like CuO/CF@NiCoMn–OH has broad application prospects in high-performance energy storage equipment.

Metal‐Organic Frameworks and Their Derivatives‐Based Nanostructure with Different Dimensionalities for Supercapacitors

“…Reproduced with permission. [ 180 ] Copyright 2021, American Chemical Society. b) The diagrams for the preparation of helical carbon nanotubes derived from epitaxial Cu‐MOF coating on textiles.…”

Deformation-Mediated Surface Activation of a Ni–Cu–Mn Ternary Alloy System for Energy Storage in Supercapacitors

“…However, one of the limiting factors of the current supercapacitor technology is their subpar energy density ( E ), given by E = 0.5 CV 2 , where C is the specific capacitance and V is the potential window. In contrast to monolithic systems, multicomponent transition metal oxides (McTMOs) have shown superior energy density, owing to the synergistic effects of hybrid metal oxides/hydroxides. − …”

One-Step Solvothermal Synthesis of Raspberry-like NiCo-MOF for High-Performance Flexible Supercapacitors for a Wide Operation Temperature Range

“…To this end, we could commence by ameliorating their spatial structure and dimensions to improve the performance of powder electrode materials. MOFs are mostly in two-dimensional and three-dimensional structures. , Compared with low-dimensional materials, three-dimensional materials showcase preferred external size, specific surface area, ion transport, charge arrangement, etc . Meanwhile, preliminary research studies have been carried out to prepare shape-controlled composited structural materials based on monometallic MOFs for use as electrode materials.…”