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Issue 19, 2016
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One-step process to form a nickel-based/carbon nanofoam composite supercapacitor electrode using Na2SO4 as an eco-friendly electrolyte

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Abstract

In this work, NiOx is anodically electrodeposited onto carbon nanofoam (CNF) to form a composite electrode devoted to supercapacitor applications. The use of NiSO4 as precursor in electrodeposition results in the formation of NiO and NiOOH species, as confirmed by XPS analysis, by means of a one-step anodic process. The presence of both NiO and NiOOH suggests the existence of pseudocapacitance, as observed in MnO2 and RuO2 materials. By employing Na2SO4, an eco-friendly electrolyte, the resulting composite delivers a specific capacitance of 150 F g−1 at 1 A g−1 considering the total mass of the electrode (deposit plus substrate). In addition, this composite electrode can operate in a very broad potential window, as high as 2.2 V, suggesting its application in high energy density electrochemical supercapacitors.

Graphical abstract: One-step process to form a nickel-based/carbon nanofoam composite supercapacitor electrode using Na2SO4 as an eco-friendly electrolyte

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Publication details

The article was received on 21 Oct 2015, accepted on 23 Jan 2016 and first published on 03 Feb 2016


Article type: Paper
DOI: 10.1039/C5RA22046G
Author version available: Download Author version (PDF)
Citation: RSC Adv., 2016,6, 15920-15928
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    One-step process to form a nickel-based/carbon nanofoam composite supercapacitor electrode using Na2SO4 as an eco-friendly electrolyte

    R. Della Noce, S. Eugénio, M. Boudard, L. Rapenne, T. M. Silva, M. J. Carmezim, S. W. Donne and M. F. Montemor, RSC Adv., 2016, 6, 15920
    DOI: 10.1039/C5RA22046G

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