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Issue 62, 2017, Issue in Progress
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Synthesis, characterization, and properties of nickel–cobalt layered double hydroxide nanostructures

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Abstract

Nickel–cobalt layered double hydroxides (Ni–Co-LDH) have recently been examined for their potential as battery-type hybrid supercapacitors made from metal hydroxide electrode materials, due to their unique spatial structure, excellent electrochemical activity, and good electrical conductivity. However, the main disadvantage restricting the application of Ni–Co-LDHs is their low electronic conductivity, which results in low capacitance. To address this problem, we used different concentrations of ammonium fluoride to control the Ni–Co-LDH surface morphology and direct growth on Ni foam (NF). We created Ni–Co-LDH composite electrode materials with different morphologies that showed large surface areas, high conductivity, and high electrochemical performance. Results showed that the samples prepared with ammonium fluoride additive had a higher specific capacity of about 1445 F g−1 at a current density of 2 A g−1, a good specific capacitance rate of about 59.5% from 2 A g−1 to 40 A g−1, and good capacity retention of up to 99% when the current density was enhanced to 30 A g−1, suggesting promise for future applications.

Graphical abstract: Synthesis, characterization, and properties of nickel–cobalt layered double hydroxide nanostructures

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Article information


Submitted
15 Jun 2017
Accepted
26 Jul 2017
First published
09 Aug 2017

This article is Open Access

RSC Adv., 2017,7, 38945-38950
Article type
Paper

Synthesis, characterization, and properties of nickel–cobalt layered double hydroxide nanostructures

C. Xing, F. Musharavati, H. Li, E. Zalezhad, O. K. S. Hui, S. Bae and B. Cho, RSC Adv., 2017, 7, 38945 DOI: 10.1039/C7RA06670H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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