Journal
CARBON
Volume 111, Issue -, Pages 419-427Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.10.025
Keywords
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Funding
- Natural Science Foundation of State key Laboratory of China
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The ultrathin porous carbon shell with the thickness of about 10 nm has been fabricated by a facile method using sodium citrate as carbon precursor without any activation. The electric conductivity of the material is as high as 7.12 S/cm, which contributes to a good rate performance for supercapacitor electrode without any conductive additive. When tested in 6 M KOH by three-electrode system, the C-700 sample exhibits specific capacitance of 251 F g(-1) at 1 A g(-1), high rate capability with the specific capacitance of 228 F g(-1) at 20 A g(-1), only a loss of 3% after 10000 cycles at a current density of 3 A g(-1). Non aqueous performance was tested in 1 M TEA-BF4/acetonitrile, the material can deliver an energy density of 12-17 Wh g(-1) in a two-electrode system. Apparently, the porous carbon with ultrathin structure can provide low-resistant pathways and short ion diffusion channels for energy storage. Therefore, the ultrathin porous carbon shell would be a promising material particularly for applications where high power output performances are required. (C) 2016 Elsevier Ltd. All rights reserved.
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