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Issue 48, 2018
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Shape-controlled synthesis of porous carbons for flexible asymmetric supercapacitors

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Abstract

N-Doped carbon nanomaterials have gained tremendous research interest in energy storage because of their high capacitance and chemical stability. Here, N-doped porous carbons (NPCs) with multiple shape-controlled and tunable morphologies are developed through a direct one-step pyrolysis/activation method. Typically, NPC-700-1, which is 5 nm thick and 6 μm wide, shows a high surface area (1591.5 m2 g−1) and hierarchical micro-, meso-, and macroporous architecture. The maximum specific capacitance of the as-prepared carbon nanosheets is 406 F g−1 at 1 A g−1 in KOH electrolyte. Moreover, flexible all-solid-state asymmetric supercapacitor devices assembled from NPCs and NiCo2O4 deliver a superior energy density of 42.7 W h kg−1 at 794.6 W kg−1, and good cycling ability (94% after 10 000 cycles). All the results suggest that NPCs have great potential for high performance wearable electronics and energy storage devices.

Graphical abstract: Shape-controlled synthesis of porous carbons for flexible asymmetric supercapacitors

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Publication details

The article was received on 10 Sep 2018, accepted on 07 Nov 2018 and first published on 08 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR06966B
Citation: Nanoscale, 2018,10, 22848-22860

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    Shape-controlled synthesis of porous carbons for flexible asymmetric supercapacitors

    Y. Liu, X. Wang, X. Jiang, X. Li and L. Yu, Nanoscale, 2018, 10, 22848
    DOI: 10.1039/C8NR06966B

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