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Issue 40, 2018
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Synthesis of N-doped carbon nanosheets with controllable porosity derived from bio-oil for high-performance supercapacitors

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Abstract

Bio-oil, an oxygen-enriched precursor, is the liquid product from the fast pyrolysis of abundant and renewable biomass. Herein, nitrogen-doped porous carbon nanosheets (NPCS) with a unique interlinked architecture were synthesized successfully from bio-oil. The optimized sample shows 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 heteroatoms (∼5.83 at% N and ∼9.78 at% O). Benefitting from the favorable characteristics mentioned above, it exhibits a prominent specific capacitance of 289 F g−1 at 0.5 A g−1 and excellent rate 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 that the as-prepared samples have considerable potential for low-cost and renewable energy storage devices.

Graphical abstract: Synthesis of N-doped carbon nanosheets with controllable porosity derived from bio-oil for high-performance supercapacitors

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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, 2018,6, 19653-19663
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    Synthesis of N-doped 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, 6, 19653
    DOI: 10.1039/C8TA07563H

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