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Polarity-Assisted Formation of Hollow-Frame Sheathed Nitrogen-Doped Nanofibrous Carbon for Supercapacitor

Abstract

Heteroatom-doped carbon nanostructures with uniform size and morphology, well designed architectures, and minimized interfacial resistance have been recognized as promising electrode materials for energy storage, but remain a crucial challenge. Herein, we develop a general approach of polarity-induced decoration of a monolayer sheath of metal organic framework (MOF) particles with excellent uniformity in size and morphology on electrospun polymer nanofibers. These hybrid nanofibers are facilely converted into nitrogen-doped nanofibrous carbon (denoted as N-NFC) during pyrolysis. Thus-obtained N-NFC features (1) one-dimensional nanofibrous structure with a highly conductive core, (2) a monolayer sheath of hollow carbon-frames with uniform size and morphology, (3) plenty of micro/mesopores with a high accessible surface area, and (4) a high N-doping level, all of which guarantee its good electrochemical performances with a high capacitance of 387.3 F g-1 at 1 A g-1. In solid-state supercapacitor, it delivers excellent rate capability (78.0 F g-1 at 0.2 A g-1 and 64.0 F g-1 at 1 A g-1), enhanced energy density of 7.9 Wh kg-1 at the power density of 219 W kg-1, and outstanding cycling stability with 90% capacity retained over 10000 cycles at 1 A g-1.

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Publication details

The article was received on 22 Nov 2018, accepted on 07 Jan 2019 and first published on 08 Jan 2019


Article type: Paper
DOI: 10.1039/C8NR09454C
Citation: Nanoscale, 2019, Accepted Manuscript
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    Polarity-Assisted Formation of Hollow-Frame Sheathed Nitrogen-Doped Nanofibrous Carbon for Supercapacitor

    Y. Gong, R. Chen, H. Xu, C. Yu, X. Zhao, Y. Sun, Z. Hui, J. Y. Zhou, J. An, Z. Du, G. Sun and W. Huang, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C8NR09454C

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