Journal
CARBON
Volume 93, Issue -, Pages 412-420Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.05.040
Keywords
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Funding
- Harbin Innovation Talents of Science and Technology Research Special Fund Project [2012RFXXG005]
- Fundamental Research funds for the Central Universities
- Natural Science Foundation of Heilongjiang Province [E201416]
- Excellent Youth Foundation of Heilongjiang Province of China [JC201210]
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Functionalized porous carbon with three-dimensional (3D) interconnected pore structure has been successfully synthesized through direct heat-treatment of KOH-soaked soybeans. Benefiting from heteroatoms (N, O) doping, interconnected porous carbon framework with high surface area as well as high packing density (up to 1.1 g cm(-3)), the as-obtained porous carbon material exhibits high volumetric capacitance of 468 F cm(-3), good rate capability and excellent cycling stability (91% of capacitance retention after 10,000 cycles) in 6 M KOH electolyte. More importantly, the as-assembled symmetric supercapacitor delivers high volumetric energy density of 28.6 Wh L-1 in 1 M Na2SO4 aqueous solution. (C) 2015 Elsevier Ltd. All rights reserved.
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