Abstract
Three-dimensional interconnected porous carbon aerogels were successfully prepared by the pyrolysis of sodium carboxymethyl cellulose/poly(vinyl alcohol) composite using borax as a cross-linking agent. After sol–gel, freeze-drying, carbonization and KOH-activation treatments, the as-obtained carbon aerogels exhibited high specific surface areas (SSAs) and excellent electrochemical performance. The optimal sample showed a high SSA of up to 601.4 m2/g with a total pore volume of 0.38 cm3/g. The aCA-3 sample exhibited an excellent capacitance of 182.8 F/g at a current density of 0.5 A/g, within a potential window of − 1.0 to 0.0 V in a 6 M KOH electrolyte solution. In addition, the aCA-3 electrode showed excellent cyclability with 96.2% capacitance retention efficiency at 2 A/g current density after 2000 cycles of charge/discharge. These easily prepared, well-structured and high-performance carbon aerogels have significant potential applications in advanced electronic devices and energy storage systems.
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Acknowledgements
This work was supported by the Fundamental Research Funds for Central Universities (E2572017EB05) and Heilongjiang Province outstanding youth science fund (JC201301).
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Yu, M., Han, Y., Li, J. et al. Three-dimensional porous carbon aerogels from sodium carboxymethyl cellulose/poly(vinyl alcohol) composite for high-performance supercapacitors. J Porous Mater 25, 1679–1689 (2018). https://doi.org/10.1007/s10934-018-0581-8
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DOI: https://doi.org/10.1007/s10934-018-0581-8