NDLI: The electrocapacitive properties of graphene oxide reduced by urea

Content Provider	Royal Society of Chemistry (RSC)
Author	Lei, Zhibin Zhao, X. S. Lu, Li
Copyright Year	2012
Abstract	We report a facile and green route to reduce graphite oxide using urea as the reducing agent. UV-Vis, XRD and XPS results revealed that urea was an effective reducing agent in removing oxygen-containing groups from graphite oxide for restoring the conjugated electronic structure of graphene. The obtained reduced graphene oxide was tested as supercapacitor electrode. Gravimetric capacitances of 255 and 100 F g−1 at current densities of 0.5 and 30 A g−1, respectively, were observed. The reduced graphene oxide paper showed a volumetric capacitance of 196 F cm−3. After 1200 continuous cycles of galvanostatic charge–discharge, the electrode retained 93% of its capacitance. The electrocapacitive performance of the urea-reduced graphene oxide outperformed most of the previously reported graphene-based electrode materials, which were reduced by hydrazine or NaBH4. The present reduction method holds great promise for mass production of soluble graphene-based materials for electrochemical energy storage.
Starting Page	6391
Ending Page	6399
Page Count	9
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	5
Issue Number	4
Journal	Energy & Environmental Science
DOI	10.1039/c1ee02478g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Graphite oxide Urea Reducing agent X-ray crystallography Graphene Supercapacitor Electrode Graphene oxide paper Capacitance Hydrazine Sodium borohydride Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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