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Issue 5, 2018
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A hierarchical porous N-doped carbon electrode with superior rate performance and cycling stability for flexible supercapacitors

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Abstract

A novel carbon electrode with high nitrogen content and a hierarchical porous structure has been prepared via a three-step carbonization of a three-dimensional graphene and polyaniline nanoarray composite film. The as-obtained nitrogen-doped electrodes show favorable features for flexible electrochemical energy storage, such as a hierarchical porous structure with interconnected three-dimensional (3D) pores, high flexibility and rich nitrogen-doping (9.71%). With respect to the multiple synergistic effects of these merits, a two-electrode-based supercapacitor has been fabricated. The assembled supercapacitor exhibited a high specific capacitance of 221 F g−1 at 5 mV s−1, and an excellent rate capability with a capacitance retention of 84% when the current density was varied from 3 A g−1 to 50 A g−1, and demonstrated no capacitance reduction even after 20000 cycles of charging and discharging at 5 A g−1. Moreover, when the electrode was assembled into a flexible device, it exhibited good flexibility with 96% retention of its initial capacitance after 10000 cycles at 5 A g−1 when the flexible device was bent to 180°. The strategy in this study represents a facile strategy for constructing well-defined 3D structures with a high nitrogen-doping content, which is promising for constructing a flexible energy storage system.

Graphical abstract: A hierarchical porous N-doped carbon electrode with superior rate performance and cycling stability for flexible supercapacitors

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Publication details

The article was received on 17 Jan 2018, accepted on 06 Mar 2018 and first published on 07 Mar 2018


Article type: Research Article
DOI: 10.1039/C8QM00023A
Citation: Mater. Chem. Front., 2018,2, 986-992
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    A hierarchical porous N-doped carbon electrode with superior rate performance and cycling stability for flexible supercapacitors

    M. Cheng, Y. Meng, Q. Meng, L. Mao, M. Zhang, K. Amin, A. Ahmad, S. Wu and Z. Wei, Mater. Chem. Front., 2018, 2, 986
    DOI: 10.1039/C8QM00023A

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