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Issue 26, 2018
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A general strategy to synthesize high-level N-doped porous carbons via Schiff-base chemistry for supercapacitors

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Abstract

Recently, the synthesis of porous carbon-based materials, especially those with unique geometry, narrow pore size distribution, large surface area and high nitrogen content, has been highly attractive for widespread applications, but remains a great challenge. Herein, we demonstrate a novel strategy for highly efficient synthesis of high-level N-doped microporous carbon spheres (N-MCSs) based on a very simple Schiff-base reaction of 3,3′-diaminobenzidine and p-phthalaldehyde in ethanol solvent without any catalyst or tedious procedure, followed by a common one-step carbonization–activation process. The N-MCSs exhibit a spherical morphology, regular micropores, high surface areas and high nitrogen contents (up to 8.71 at%). N-MCSs used as supercapacitor electrodes deliver high gravimetric capacitance, good rate capability and cycling stability. More importantly, the synthetic approach can be extended to other Schiff-base systems such as p-phthalaldehyde and p-phenylenediamine or ethylenediamine to fabricate porous carbon-based materials with high nitrogen species, tunable morphology and pore structure. The general strategy presented in this study opens up a new window for heteroatom doping, geometry and structure control, and highlights the great potential of well-developed carbon-based materials for extensive applications.

Graphical abstract: A general strategy to synthesize high-level N-doped porous carbons via Schiff-base chemistry for supercapacitors

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Publication details

The article was received on 13 Mar 2018, accepted on 31 May 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA02341G
Citation: J. Mater. Chem. A, 2018,6, 12334-12343

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    A general strategy to synthesize high-level N-doped porous carbons via Schiff-base chemistry for supercapacitors

    D. Zhu, J. Jiang, D. Sun, X. Qian, Y. Wang, L. Li, Z. Wang, X. Chai, L. Gan and M. Liu, J. Mater. Chem. A, 2018, 6, 12334
    DOI: 10.1039/C8TA02341G

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