Journal
ELECTROCHIMICA ACTA
Volume 105, Issue -, Pages 353-361Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.05.031
Keywords
NiO; Nanoparticles; Ni foam; Electrodeposition; Supercapacitors
Categories
Funding
- NSFC [20973126]
- STCSM [10PJ1409600]
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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 low-temperature 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 Fg(-1) at 2 A g(-1) in a potential window of 0.5 V) and excellent rate capability (70% capacity retention at 40A g(-1)), which shows great potential in the development of high-performance energy-storage systems. (C) 2013 Elsevier Ltd. All rights reserved.
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