One-step process to form a nickel-based/carbon nanofoam composite supercapacitor electrode using Na2SO4 as an eco-friendly electrolyte
In this work, NiO x is anodically electrodeposited onto carbon nanofoam (CNF) to form a composite electrode devoted to supercapacitor applications. The use of NiSO 4 as precursor in electrodeposition results in the formation of NiO and NiOOH species, as confirmed by XPS analysis, by means of a one-s...
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Published in | RSC advances Vol. 6; no. 19; pp. 1592 - 15928 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Royal Society of Chemistry
01.01.2016
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Subjects | |
Online Access | Get full text |
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Summary: | In this work, NiO
x
is anodically electrodeposited onto carbon nanofoam (CNF) to form a composite electrode devoted to supercapacitor applications. The use of NiSO
4
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 MnO
2
and RuO
2
materials. By employing Na
2
SO
4
, 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.
Anodic electrodeposition of NiO
x
(NiO + NiOOH) onto carbon nanofoam forming a supercapacitor electrode. The resulting composite electrode operates at 2.2 V in Na
2
SO
4
aqueous medium. |
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ISSN: | 2046-2069 |
DOI: | 10.1039/c5ra22046g |