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

Abstract

Designing advanced carbon electrodes have been considered as one of the most promising directions. Here, we report a facile approach to produce porous carbon materials. The nanocarbons are prepared with KOH activation by using natural polysaccharide-sodium alginate as the precursor, while further introduction of nitrogen heteroatoms is achieved by the addition of urea. The optimal electrode 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 for supercapacitors and lithium ion batteries. Employed for supercapacitor electrodes, 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 can be obtained in alkaline electrolyte, while 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 received in 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 have been observed. The present work highlights that high-performance carbon electrodes can be produced by using sustainable precursor for multiple energy storage.

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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, 2017, Accepted Manuscript
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    Nitrogen-doped porous carbons derived from natural polysaccharide for multiple energy storage

    Y. Cui, H. Wang, X. Xu, Y. Lv, J. Shi, W. Liu, S. Chen and X. Wang, Sustainable Energy Fuels, 2017, Accepted Manuscript , DOI: 10.1039/C7SE00443E

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