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Issue 8, 2019
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Hierarchical spheres constructed by ultrathin VS2 nanosheets for sodium-ion batteries

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Abstract

In the present work, a one-step route was developed for synthesizing VS2 microspheres in the absence of an additive, and they were assembled from ultrathin nanosheets. Such three-dimensional hierarchical VS2 spheres could not only act as a reservoir for electrolyte diffusion but also provide sufficient void space for volume variation during the intercalation/de-intercalation process of Na+ ions. As a result, the material could exhibit a superior rate and long cycling stability. In detail, capacity of 565 mA h gāˆ’1 was obtained after 1000 cycles at 2 A gāˆ’1, making it a promising electrode material for electrochemical applications. Meanwhile, to further prove the excellent electrochemical performance, VS2 nanosheets were also investigated by density-functional theory (DFT) calculations, indicating their metallic feature and large adsorption capacity for the intercalation of Na+ ions.

Graphical abstract: Hierarchical spheres constructed by ultrathin VS2 nanosheets for sodium-ion batteries

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Article information


Submitted
11 Dec 2018
Accepted
17 Jan 2019
First published
17 Jan 2019

J. Mater. Chem. A, 2019,7, 3691-3696
Article type
Paper

Hierarchical spheres constructed by ultrathin VS2 nanosheets for sodium-ion batteries

J. Wang, N. Luo, J. Wu, S. Huang, L. Yu and M. Wei, J. Mater. Chem. A, 2019, 7, 3691
DOI: 10.1039/C8TA11950C

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