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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, Advance Article
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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, Advance Article , DOI: 10.1039/C8TA09551E

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