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Multifunctional Vanadium Nitride@N-Doped Carbon Composite for Kinetic-Enhanced Lithium-Sulfur Batteries

Abstract

On the heels of growing demand for electric vehicles and storage applications, lithium-sulfur (Li-S) batteries with 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 as well as the restricted self-discharge behavior. Benefiting from the structure, the resulting compound demonstrates exceptional performance with high discharge capacity of 875 mAh g-1 at 1 C, prominent rate capability of 550 mAh g-1 at 6 C and remarkable electrochemical performances even with high sulfur loading (4.2 mg cm-2). This conductive VN@C composite and its electrochemical performance could offer novel insights for further design in Li-S batteries.

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Supplementary files

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, Accepted Manuscript
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    Multifunctional Vanadium Nitride@N-Doped Carbon Composite for Kinetic-Enhanced Lithium-Sulfur Batteries

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

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