Journal
CARBON
Volume 60, Issue -, Pages 481-487Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2013.04.067
Keywords
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Funding
- National Science Foundation of China [51077014, 21003028, 51202043]
- Fundamental Research funds for the Central Universities
- Program for New Century Excellent Talents in University [NCET-10-0050]
- Excellent Youth Foundation of Heilongjiang Province of China [JC201210]
- Postdoctoral Science-Research Developmental Foundation of Heilongjiang Province [LBH-Q12113]
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Two-dimensional mesoporous carbon sheet-like framework (MCSF) material has been prepared using mesoporous SiO2 nanosheet as template and coal tar pitch as carbon precursor. MCSF sheets consisting of numerous mesopores have a specific surface area of 582.7 m(2) g(-1). As a result, the MCSF electrode possesses a maximum specific capacitance of 264 F g(-1) at 5 mV s(-1), excellent rate capability (74% retention ratio at 1000 mV s(-1)), and impressive cycling stability with 91% initial capacitance retained after 5000 cycles at 200 mV s(-1) in 6 mol L-1 KOH. MCSF symmetric supercapacitor exhibits a maximum energy density of 9.6 Wh kg(-1) at 5 mV s(-1) and a maximum power density of 119.4 kW kg(-1) based on the total mass of the two electrodes in 1 mol L-1 Na2SO4 electrolyte. (C) 2013 Elsevier Ltd. All rights reserved.
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