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Journal of Materials Science
Erschienen in: Journal of Materials Science 19/2015

01.10.2015 | Original Paper

Electrochemical preparation and energy storage properties of nanoporous Co(OH)2 via pulse current deposition

verfasst von: Chao Chen, Misuk Cho, Youngkwan Lee

Erschienen in: Journal of Materials Science | Ausgabe 19/2015

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Abstract

Nanoporous Co(OH)2 films are electrochemically deposited on Ni foams by pulse current deposition for supercapacitor application. The pore size and density are controlled by reaction conditions including frequency modulation and reaction time. The morphology of the films is monitored by SEM, and the chemical composition and crystal structure are confirmed by XPS and XRD, respectively. The electrochemical performance of the Co(OH)2 film is characterized by cyclic voltammetry and charge–discharge tests. The charge-transfer resistances of the electrodes are examined by electrochemical impedance spectroscopy. The Co(OH)2 film exhibits an excellent specific capacity of 1681 F g−1 at a current density of 2 A g−1 in a potential range of −0.1 to 0.4 V from the charge/discharge test; this specific capacity is much higher than that obtained by direct current deposition (623 F g−1 at the same condition) due to the highly porous structure.
Vorheriger Artikel Comparative study of PVA/SiO2 and PVA/SiO2/glutaraldehyde (GA) nanocomposite membranes prepared by single-step solution casting method
Nächster Artikel Structural evolution, mechanical properties, and electronic structure of Al–Mg–Si compounds from first principles

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Metadaten
Titel
Electrochemical preparation and energy storage properties of nanoporous Co(OH)2 via pulse current deposition
verfasst von
Chao Chen
Misuk Cho
Youngkwan Lee
Publikationsdatum
01.10.2015
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 19/2015
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-015-9207-6

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