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Two-dimensional Sb@TiO 2-: X nanoplates as a high-performance anode material for sodium-ion batteries

Journal Article


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@TiO 2-x nanoplates, consisting of an amorphous TiO 2-x layer coated with ultra-small Sb nanocrystals, are prepared by a facile salt-template method. The incorporation of electrochemical/thermally-stable TiO 2-x is helpful to buffer the volume change of Sb and stabilize the SEI layer. In addition, the 2D structure of the Sb@TiO 2-x nanoplates can facilitate sodium ion diffusion and electronic transport during cycling. As a result, the 2D-Sb@TiO 2-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.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2019

Citation


  • Li, P., Li, P., Guo, X., Wang, S., Zang, R., Li, X., . . . Wang, G. (2019). Two-dimensional Sb@TiO 2-: X nanoplates as a high-performance anode material for sodium-ion batteries. Journal of Materials Chemistry A, 7(6), 2553-2559. doi:10.1039/c8ta09551e

Scopus Eid


  • 2-s2.0-85061124904

Start Page


  • 2553

End Page


  • 2559

Volume


  • 7

Issue


  • 6

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@TiO 2-x nanoplates, consisting of an amorphous TiO 2-x layer coated with ultra-small Sb nanocrystals, are prepared by a facile salt-template method. The incorporation of electrochemical/thermally-stable TiO 2-x is helpful to buffer the volume change of Sb and stabilize the SEI layer. In addition, the 2D structure of the Sb@TiO 2-x nanoplates can facilitate sodium ion diffusion and electronic transport during cycling. As a result, the 2D-Sb@TiO 2-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.

UOW Authors


  •   Wang, Guoxiu (external author)

Publication Date


  • 2019

Citation


  • Li, P., Li, P., Guo, X., Wang, S., Zang, R., Li, X., . . . Wang, G. (2019). Two-dimensional Sb@TiO 2-: X nanoplates as a high-performance anode material for sodium-ion batteries. Journal of Materials Chemistry A, 7(6), 2553-2559. doi:10.1039/c8ta09551e

Scopus Eid


  • 2-s2.0-85061124904

Start Page


  • 2553

End Page


  • 2559

Volume


  • 7

Issue


  • 6