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Nitrogen-doped porous carbons derived from a natural polysaccharide for multiple energy storage devices

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Abstract

Designing advanced carbon electrodes is considered as one of the most promising directions for energy storage. Herein, we report a facile approach to produce porous carbon nanomaterials. The carbon nanomaterials were prepared via KOH activation using natural polysaccharide-sodium alginate as the precursor with the subsequent introduction of additional nitrogen heteroatoms achieved by further reaction with urea. The optimal electrodes with a high specific surface area (up to 3313 m2 g−1), interconnected porosity, and rich nitrogen (∼7.2 wt%) and oxygen (∼7.4 wt%) doping can achieve an excellent electrochemical performance in supercapacitors and lithium ion batteries. When these materials are employed as supercapacitor electrodes, they achieved an outstanding specific capacitance of 267 F g−1 at 1 A g−1 and an extremely high rate performance with 76.8% capacitance retention ratio in an alkaline electrolyte. In addition, a high capacitance of 197 F g−1 at 0.5 A g−1 with a high capacitance retention ratio of 52.9% at 100 A g−1 can be achieved in an ionic liquid electrolyte. When tested as lithium ion battery anodes, an extraordinarily high specific capacity of 1455 mA h g−1 and a stable energy storage performance up to 500 cycles were observed. The present study highlights that high-performance carbon electrodes can be produced by using sustainable precursor and can be used in multiple energy storage systems.

Graphical abstract: Nitrogen-doped porous carbons derived from a natural polysaccharide for multiple energy storage devices

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Publication details

The article was received on 13 Sep 2017, accepted on 08 Nov 2017 and first published on 09 Nov 2017


Article type: Paper
DOI: 10.1039/C7SE00443E
Citation: Sustainable Energy Fuels, 2018, Advance Article
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    Nitrogen-doped porous carbons derived from a natural polysaccharide for multiple energy storage devices

    Y. Cui, H. Wang, X. Xu, Y. Lv, J. Shi, W. Liu, S. Chen and X. Wang, Sustainable Energy Fuels, 2018, Advance Article , DOI: 10.1039/C7SE00443E

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