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Issue 6, 2019
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Two-dimensional Sb@TiO2−x nanoplates as a high-performance anode material for sodium-ion batteries

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Abstract

Alloy-based anode materials, including antimony (Sb), with high electronic conductivity and high capacity show great potential for sodium-ion batteries. However, the significant volume change of Sb leads to pulverization of active material and rapid capacity decay. Herein, two-dimensional (2D) Sb@TiO2−x nanoplates, consisting of an amorphous TiO2−x layer coated with ultra-small Sb nanocrystals, are prepared by a facile salt-template method. The incorporation of electrochemical/thermally-stable TiO2−x is helpful to buffer the volume change of Sb and stabilize the SEI layer. In addition, the 2D structure of the Sb@TiO2−x nanoplates can facilitate sodium ion diffusion and electronic transport during cycling. As a result, the 2D-Sb@TiO2−x electrodes deliver a high reversible capacity of 568 mA h g−1 at 100 mA g−1, good rate capability (429 mA h g−1 at 3200 mA g−1) and stable cycling performance with a capacity retention of 95.2% after 100 cycles.

Graphical abstract: Two-dimensional Sb@TiO2−x nanoplates as a high-performance anode material for sodium-ion batteries

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Publication details

The article was received on 03 Oct 2018, accepted on 21 Nov 2018 and first published on 22 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA09551E
Citation: J. Mater. Chem. A, 2019,7, 2553-2559

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    Two-dimensional Sb@TiO2−x nanoplates as a high-performance anode material for sodium-ion batteries

    P. Li, X. Guo, S. Wang, R. Zang, X. Li, Z. Man, P. Li, S. Liu, Y. Wu and G. Wang, J. Mater. Chem. A, 2019, 7, 2553
    DOI: 10.1039/C8TA09551E

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