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|Title:||The electrocapacitive properties of graphene oxide reduced by urea|
|Authors:||Lei, Z. |
|Source:||Lei, Z., Lu, L., Zhao, X.S. (2012-04). The electrocapacitive properties of graphene oxide reduced by urea. Energy and Environmental Science 5 (4) : 6391-6399. ScholarBank@NUS Repository. https://doi.org/10.1039/c1ee02478g|
|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 NaBH 4. The present reduction method holds great promise for mass production of soluble graphene-based materials for electrochemical energy storage. This journal is © 2012 The Royal Society of Chemistry.|
|Source Title:||Energy and Environmental Science|
|Appears in Collections:||Staff Publications|
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