Journal
ELECTROCHIMICA ACTA
Volume 146, Issue -, Pages 548-555Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.09.036
Keywords
Supercapacitor; Nitrogen-doping; Porous carbon nanosheet; Volumetric performance
Categories
Funding
- National Science Foundation of China [51202043]
- Specialized Research Fund for the Doctoral Program of Higher Education [20122304110020]
- Harbin Innovation Talents of Science and Technology Research Special Fund Project (Leader) [2012RFXXG005]
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Heilongjiang Province [E201416]
- Excellent Youth Foundation of Heilongjiang Province of China [JC201210]
- Open Project Program of Key Laboratory for Photonic and Electric Bandgap Materials (Harbin Normal University)
- Open Project Program of Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education
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Nitrogen-doped sandwich-like porous carbon nanosheets (NPCG) have been prepared simply through carbonization of graphene/polyaniline hybrid materials. Due to its interconnected microporous structure, high nitrogen content (12.7 at.%), high surface area (410.4 m(2) g(-1)) and high volumetric density (0.94g cm(-3)), the obtained sample prepared at 700 degrees C (NPCG-700) shows both high gravimetric and volumetric capacitances of 305 F g(-1) and 287 F cm(-3) in 6M KOH aqueous electrolyte, respectively. In addition, the assembled supercapacitor delivers a high energy density (16.3 Wh kg(-1) and 15.3 Wh L-1) in 1 M Na2SO4 aqueous electrolyte. Importantly, 97% of the initial capacitance is maintained after 5000 cycles, suggesting excellent cycling stability. (C) 2014 Elsevier Ltd. All rights reserved.
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