Journal
ACS NANO
Volume 6, Issue 8, Pages 7092-7102Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn302147s
Keywords
nitrogen-doped porous carbon nanofibers; scale-up production; electrode material; supercapacitors
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Funding
- National Basic Research Program of China [2010CB934700]
- National Natural Science Foundation of China [91022032, 21061160492, 11030412]
- Chinese Academy of Sciences [KJZD-EW-M01-1]
- International Science & Technology Cooperation Program of China [2010DFA41170]
- National Synchrotron Radiation Laboratory at the University of Science and Technology of China
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Supercapacitors (also known as ultracapacitors) are considered to be the most promising approach to meet the pressing requirements of energy storage. Supercapacitive electrode materials, which are closely related to the high-efficiency storage of energy, have provoked more interest. Herein, we present a high-capacity supercapacitor material based on the nitrogen-doped porous carbon nanofibers synthesized by carbonization of macroscopic-scale carbonaceous nanofibers (CNFs) coated with polypyrrole (CNFs@polypyrrole) at an appropriate temperature. The composite nanofibers exhibit a reversible specific capacitance of 202.0 F g(-1) at the current density of 1.0 A g(-1) in 6.0 mol L-1 aqueous KOH electrolyte, meanwhile maintaining a high-class capacitance retention capability and a maximum power density of 89.57 kW kg(-1). This kind of nitrogen-doped carbon nanofiber represents an alternative promising candidate for an efficient electrode material for supercapacitors.
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