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Synthesis of electrochemically-reduced graphene oxide film with controllable size and thickness and its use in supercapacitor

Peng, Xuyuan and Liu, Xiao-Xia and Diamond, Dermot and Lau, Kim (2011) Synthesis of electrochemically-reduced graphene oxide film with controllable size and thickness and its use in supercapacitor. Carbon, 49 (11). pp. 3488-3496. ISSN 0008-6223

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Abstract

An electrochemical synthesis method of reducing graphene oxide (GO) under constant potential is reported. Electrochemical technique offers control over reaction parameters such as the applied voltage, electrical current and reduction time; whereas the desired size and thickness of the film can be pre-determined by controlling the amount of precur- sor GO deposited on the electrode with defined shape and surface area. This synthesis technique produces high quality electrochemically reduced GO (ERGO) film with control- lable size and thickness. Electrochemical symmetrical supercapacitors based on ERGO films achieved a specific capacitance of 128 F/g with an energy density of 17.8 Wh/kg operating within a potential window of 1.0 V in 1.0 M NaNO3. The supercapacitor was shown to be stable, retaining ca. 86% of the original specific capacitance after 3500 charge–discharge cycles. The results indicate that this simple synthesis technique for providing graphene-like materials has great potential in various applications such as energy storage.

Item Type:Article (Published)
Refereed:Yes
Subjects:Engineering > Materials
Physical Sciences > Analytical chemistry
Physical Sciences > Chemistry
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Biotechnology
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Publisher:Elsevier
Official URL:http://dx.doi.org/10.1016/j.carbon.2011.04.047
Copyright Information:© 2011 Elsevier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:China Scholarship Council, National Natural Science Foundation of China (50973013), China-Ireland Collaboration Funding (co-funded by SFI, RCS and CMOST), Science Foundation Ireland under Grant 07/CE/I1147
ID Code:17897
Deposited On:09 Apr 2013 10:34 by Kevin Fraser. Last Modified 09 Apr 2013 10:34

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