Issue 5, 2019

Polarity-assisted formation of hollow-frame sheathed nitrogen-doped nanofibrous carbon for supercapacitors

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. The thus-obtained N-NFC features (1) a 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 highly accessible surface area, and (4) a high N-doping level, all of which guarantee its good electrochemical performance with a high capacitance of 387.3 F g−1 at 1 A g−1. In a 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), an enhanced energy density of 7.9 W h kg−1 at a power density of 219 W kg−1, and outstanding cycling stability with 90% capacity retained over 10 000 cycles at 1 A g−1.

Graphical abstract: Polarity-assisted formation of hollow-frame sheathed nitrogen-doped nanofibrous carbon for supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
22 Nov 2018
Accepted
07 Jan 2019
First published
08 Jan 2019

Nanoscale, 2019,11, 2492-2500

Polarity-assisted formation of hollow-frame sheathed nitrogen-doped nanofibrous carbon for supercapacitors

Y. Gong, R. Chen, H. Xu, C. Yu, X. Zhao, Y. Sun, Z. Hui, J. Zhou, J. An, Z. Du, G. Sun and W. Huang, Nanoscale, 2019, 11, 2492 DOI: 10.1039/C8NR09454C

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