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Synthesis of N-doping carbon nanosheets with controllable porosity derived from bio-oil for high-performance supercapacitors

Abstract

Bio-oil, oxygen-enriched precursor, is the liquid product from the fast pyrolysis of abundant and renewable biomass. Herein, nitrogen-doped porous carbon nanosheet (NPCS) with unique interlinked architecture from bio-oil was synthesized successfully. The optimized sample delivers a high specific surface area of 2566 m2 g−1, large pore volume (2.108 cm3 g−1), tunable hierarchical micro-/mesoporous structure and considerable content of heteroatom (~5.83 at.% N, ~9.78 at.% O). Benefitting from the favorable characteristics above, it exhibits a prominent specific capacitance of 289 F•g−1 at 0.5 A•g−1 and excellent rate capability (capability 84.1% capacitance retention at 10 A g-1) in 6 M KOH. In addition, the electrode demonstrates superb cycling stability with only 3% capacitance loss after 10,000 cycles. The assembled symmetric supercapacitor can deliver a superior energy density of 21.0 W h kg−1 at a high power density of 463.0 W kg−1. These results highlight the as-prepared samples have considerable potential for low-cost and renewable energy storage devices.

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Publication details

The article was received on 04 Aug 2018, accepted on 12 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07563H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Synthesis of N-doping carbon nanosheets with controllable porosity derived from bio-oil for high-performance supercapacitors

    Q. Wang, B. Qin, X. Zhang, X. Xie, L. Jin and Q. Cao, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07563H

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