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.