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Issue 21, 2017
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Composites of hierarchical metal–organic framework derived nitrogen-doped porous carbon and interpenetrating 3D hollow carbon spheres from lotus pollen for high-performance supercapacitors

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Abstract

Composites (HPNCs/CS) of hierarchical metal–organic framework derived nitrogen-doped porous carbon (HPNC) and interpenetrating 3D hollow carbon spheres (CS) from lotus pollen are prepared via facile carbonization of Zn-metal–organic frameworks (ZIF-8) by controlling the appropriate temperature. In comparison with a single 3D hollow carbon sphere from lotus pollen, HPNCs/CS reduce the agglomeration of HPNCs and increase the specific surface area, and also promote electrical conductivity. In this work, HPNCs/CS materials exhibit high electrochemical performances with a high specific capacitance of 280 F g−1 in 6 M KOH electrolyte at a current density of 1 A g−1. Moreover, the symmetric supercapacitor (HPNCs/CS//HPNCs/CS) exhibits a special energy density of about 16.2 W h kg−1 at a power density of 0.45 kW kg−1 in a wide voltage region of 0–1.8 V and a superb cycle stability (89.0% capacitance retention after 10 000 cycles) at 0.5 A g−1. Such marked response in electrochemical behaviors shows that the HPNCs/CS//HPNCs/CS supercapacitor is a promising practical energy-storage material.

Graphical abstract: Composites of hierarchical metal–organic framework derived nitrogen-doped porous carbon and interpenetrating 3D hollow carbon spheres from lotus pollen for high-performance supercapacitors

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Publication details

The article was received on 06 Jul 2017, accepted on 12 Sep 2017 and first published on 13 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02427D
Citation: New J. Chem., 2017,41, 12835-12842
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    Composites of hierarchical metal–organic framework derived nitrogen-doped porous carbon and interpenetrating 3D hollow carbon spheres from lotus pollen for high-performance supercapacitors

    L. Xin, R. Chen, Q. Liu, J. Liu, Z. Li, R. Li and J. Wang, New J. Chem., 2017, 41, 12835
    DOI: 10.1039/C7NJ02427D

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