Journal
CARBON
Volume 50, Issue 6, Pages 2179-2188Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2012.01.028
Keywords
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Funding
- National Science Foundation of China [51077014, 21003028]
- China Postdoctoral Science Foundation [20100480058, 201104411]
- Heilongjiang Postdoctoral Foundation [LBH-Z10205]
- Fundamental Research Funds for the Central Universities
- Program for New Century Excellent Talents in University [NCET-10-0050]
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Highly corrugated graphene sheets (HCGS) have been prepared by a rapid, low cost and scalable approach through the thermal reduction of graphite oxide at 900 degrees C followed by rapid cooling using liquid nitrogen. The wrinkling of the graphene sheets can significantly prevent them from agglomerating and restacking with one another face to face and thus increase the electrolyte-accessible surface area. The maximum specific capacitance of 349 F g(-1) at 2 mV s(-1) is obtained for the HCGS electrode in 6 M KOH aqueous solution. Additionally, the electrode shows excellent electrochemical stability along with an approximately 8.0% increase of the initial specific capacitance after 5000 cycle tests. These features make the present HCGS material a quite promising alternative for next generation of high-performance supercapacitors. (C) 2012 Elsevier Ltd. All rights reserved.
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