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Issue 7, 2018
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Multifunctional vanadium nitride@N-doped carbon composites for kinetically enhanced lithium–sulfur batteries

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Abstract

On the heels of growing demand for electric vehicles and storage applications, lithium–sulfur (Li–S) batteries with a high energy density have attracted significant attention. Enhancing the redox reaction kinetics, depressing the shuttle effect and the controlled deposition of lithium sulfide are simultaneously in urgent requirement for high-performance Li–S batteries. Herein we report a vanadium nitride@N-doped carbon nanowire (VN@C) hybrid composite that combines the merits of polar VN and conductive carbon to achieve fast sulfur species transformation, high adsorption of polysulfides and restricted self-discharge behavior. Benefiting from the structure, the resulting compound demonstrates exceptional performance with a high discharge capacity of 875 mA h g−1 at 1C, a prominent rate capability of 550 mA h g−1 at 6C and remarkable electrochemical performances even with a high sulfur loading (4.2 mg cm−2). This conductive VN@C composite and its electrochemical performance could offer novel insights for further design of Li–S batteries.

Graphical abstract: Multifunctional vanadium nitride@N-doped carbon composites for kinetically enhanced lithium–sulfur batteries

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Publication details

The article was received on 09 Jan 2018, accepted on 13 Feb 2018 and first published on 14 Feb 2018


Article type: Paper
DOI: 10.1039/C8NJ00125A
Citation: New J. Chem., 2018,42, 5109-5116
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    Multifunctional vanadium nitride@N-doped carbon composites for kinetically enhanced lithium–sulfur batteries

    L. Zhu, C. Li, W. Ren, M. Qin and L. Xu, New J. Chem., 2018, 42, 5109
    DOI: 10.1039/C8NJ00125A

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