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Shape-controlled Synthesis of Porous Carbons for Flexible Asymmetric Supercapacitors

Abstract

N-doping carbon nanomaterials have gained tremendous research interests in energy storage because of their high capacitance and chemical stability. Here, N-doped porous carbons (NPCs) with multiple shape-controlled and turning 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 macropores 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 by the NPCs and NiCo2O4 deliver a superior energy density of 42.7 W h kg-1 at 794.6 W kg-1, and high electrochemical life (94 % after 10000 cycles). All the results suggest that NPCs have great potential for high performance wearable electronics and energy storage devices.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C8NR06966B

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