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Nitrogen/Oxygen Co-doped Carbon Monolithic Electrode Derived from Melamine Foam for High-Performance Supercapacitors

Abstract

A novel monolithic carbon sponge is prepared by a ZnCl2-assisted carbonization of commercial melamine foam (MF) at 800 °C in N2 atmosphere. The as-prepared nitrogen/oxygen co-doped carbon sponges (NOCSs) can be directly applied as the monolithic electrode for supercapacitors without using any additives. It is found that ZnCl2 activation plays an important role in improving the supercapacitance behavior of NOCSs. Compared with the NOCS without ZnCl2 activating treatment, the optimal NOCS-1/10, obtained with ZnCl2/MF weight ratio of 1:10, has the best capacitance performance due to its unique porosity architecture, rich pseudocapacitance-active species, and good electron/ion transfer feature. It exhibits a high specific capacitance (242 F g‒1 at a current density of 0.5 A g‒1 and 325 F g‒1 at a scan rate of 10 mV s‒1) and good electrochemical cyclability (97% after 10000 cycles at 5.0 A g‒1). When being further assembled into an all-solid-state supercapacitor (PVA/KOH electrolyte), it can deliver an energy density of 4.33 Wh kg‒1 at a power density of 250 W kg‒1 and 3.13 Wh kg‒1 at a power density of 3 kW kg‒1.

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Publication details

The article was received on 06 Jul 2018, accepted on 30 Jul 2018 and first published on 02 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA06471G
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Nitrogen/Oxygen Co-doped Carbon Monolithic Electrode Derived from Melamine Foam for High-Performance Supercapacitors

    R. Zhang, X. Jin, Y. Chu, L. Wang, W. Kang, D. Wei, H. Li and S. Xiong, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06471G

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