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Porous carbon derived from Ailanthus altissima with unique honeycomb-like microstructure for high-performance supercapacitors

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Abstract

Biomass-derived porous activated carbon (AC) with high surface area of up to 1776.9 m2 g−1 was prepared by KOH and urea activation of Ailanthus altissima stems with unique honeycomb-like microstructure at 800 °C. As an electrode material for supercapacitors, the AC samples exhibited a remarkably large capacitance of 300.6 F g−1 at 0.5 A g−1 in 1 M H2SO4 and retained up to 213.4 F g−1 even at a current density of 20 A g−1. It is worth noting that no obvious capacitance loss was observed over 5000 charge/discharge cycles, clearly demonstrating the robust long-term stability. The excellent performance of the special carbon electrode can be attributed to the inherent honeycomb-like porous microstructure of Ailanthus altissima stems, which can offer more surfaces for activation by KOH to generate a more microporous network. This work provides a promising strategy to take full advantage of the unique microstructure of raw materials from nature via simple technologies to achieve sustainable energy development.

Graphical abstract: Porous carbon derived from Ailanthus altissima with unique honeycomb-like microstructure for high-performance supercapacitors

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Publication details

The article was received on 05 Apr 2017, accepted on 25 Apr 2017 and first published on 25 Apr 2017


Article type: Letter
DOI: 10.1039/C7NJ01127J
Citation: New J. Chem., 2017, Advance Article
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    Porous carbon derived from Ailanthus altissima with unique honeycomb-like microstructure for high-performance supercapacitors

    M. Zhu, J. Lan, X. Zhang, G. Sui and X. Yang, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ01127J

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