Issue 7, 2018

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

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

Supplementary files

Article information

Article type
Paper
Submitted
09 Jan 2018
Accepted
13 Feb 2018
First published
14 Feb 2018

New J. Chem., 2018,42, 5109-5116

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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