Details

Autor(en) / Beteiligte

• Della Noce, R
• Eugénio, S
• Boudard, M
• Rapenne, L
• Silva, T. M
• Carmezim, M. J
• Donne, S. W
• Montemor, M. F

Titel

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

Ist Teil von

• RSC advances, 2016-01, Vol.6 (19), p.1592-15928

Ort / Verlag

Royal Society of Chemistry

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.