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Issue 5, 2018
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In situ formation/carbonization of quinone-amine polymers towards hierarchical porous carbon foam with high faradaic activity for energy storage

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Abstract

Heteroatom doping is a very important approach to improve the performances of carbon-based electrode materials applied in the energy storage and conversion field. Herein, a strategy based on the design of faradaic redox active sites has been developed to synthesize nitrogen and oxygen co-doped carbon foam with a hierarchical porous structure. By a facile two-step method of incipient impregnation and carbonization, the quinone-amine polymer (PAQ) precursor can be in situ polymerized and carbonized on the surface of a nanosized MgO template to obtain carbon foam after removal of MgO with acetic acid. The obtained carbon foam possesses a high content of heteroatoms (total 12.26 at%) as well as faradaic active sites including nitrogen- and oxygen-containing functional groups, which not only enhance the wettability of the electrode material surface to electrolyte but also impart high pseudo-capacitance to the carbon-based skeleton. In addition, the hierarchical micro–meso–macro porous structure provides a large specific surface area (1215 m2 g−1) and a mediated pathway for electrolyte ion diffusion. Serving as a symmetric supercapacitor electrode material in aqueous electrolyte, the co-doped carbon foam yields excellent performance, delivering a high specific capacitance of 321 F g−1 at 1 A g−1, a superior energy density of 15.91 W h kg−1 at a power density of 0.4 kW kg−1, and excellent long-term stability, retaining 98% of its initial capacitance after 15 000 cycles at 5 A g−1.

Graphical abstract: In situ formation/carbonization of quinone-amine polymers towards hierarchical porous carbon foam with high faradaic activity for energy storage

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Publication details

The article was received on 01 Nov 2017, accepted on 08 Jan 2018 and first published on 08 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA09644E
Citation: J. Mater. Chem. A, 2018,6, 2353-2359
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    In situ formation/carbonization of quinone-amine polymers towards hierarchical porous carbon foam with high faradaic activity for energy storage

    Y. Zhang, T. Qu, K. Xiang, Y. Shen, S. Chen, M. Xie and X. Guo, J. Mater. Chem. A, 2018, 6, 2353
    DOI: 10.1039/C7TA09644E

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