Ultrathin porous NiO nanoflake arrays on nickel foam as an advanced electrode for high performance asymmetric supercapacitors

Nickel oxide (NiO) is a promising electrochemical material owing to its high theoretical specific capacitance, environmentally benign nature, and low cost, and can be synthesized easily by various strategies. However, the poor cycling stability of NiO hinders its potential for next generation high p...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2016-01, Vol.4 (23), p.9113-9123
Main Authors: Wu, Shuxing, Hui, K. S, Hui, K. N, Kim, Kwang Ho
Format: Article
Language:English
Subjects:
Arrays
Capacitance
Cycles
Electrodes
Foams
Nanostructure
Stability
Two dimensional
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Summary:Nickel oxide (NiO) is a promising electrochemical material owing to its high theoretical specific capacitance, environmentally benign nature, and low cost, and can be synthesized easily by various strategies. However, the poor cycling stability of NiO hinders its potential for next generation high performance energy storage applications. In this work, we demonstrate that two-dimensional (2D) NiO nanoflake arrays possess ultrathin thickness and abundant nanoscale pores vertically grown on the surface of three-dimensional nickel foam via a solvothermal reaction followed by sintering in air. Transmission electron microscopy shows that the 2D NiO nanoflakes are as thin as ∼7 nm and possess ample pores (
ISSN:2050-7488
2050-7496
DOI:10.1039/c6ta02005d