چکیده (انگلیسی):

A superior electrode for high-performance supercapacitors has been designed by growing homogeneous
NiO nanoparticles on conductive Ni foam substrate through a facile two-step method. The preparation
strategy involves the electrodeposition of nickel hydroxide precursor on Ni foam and subsequent lowtemperature
annealing process. These NiO nanoparticles are interconnected with each other, forming a
loose network with a highly open and porous structure. This unique 3D NiO–Ni foam electrode manifests
the electrolyte penetration and ion migration as well as large electroactive surface area. As a result,
outstanding pseudocapacitive performance is achieved with a high specific capacitance (2558 F g−1 at
2 A g−1 in a potential window of 0.5 V) and excellent rate capability (70% capacity retention at 40 A g−1),
which shows great potential in the development of high-performance energy-storage systems.