Microwave-Hydrothermal Synthesis of Hierarchical Sb2WO6 Nanostructures as a New Anode Material for Sodium Storage

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

16 Scopus Citations
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Author(s)

  • Ping Wang
  • Sanmu Xie
  • YiYi She
  • Wenguang Fan
  • Hongkang Wang

Detail(s)

Original languageEnglish
Pages (from-to)1078-1083
Journal / PublicationChemistryselect
Volume4
Issue number3
Online published22 Jan 2019
Publication statusPublished - 23 Jan 2019

Abstract

Novel hierarchical antimony tungstate (Sb2WO6) nanostructures with hollow disk-like morphology, which are layer-by-layer assembled from Sb2WO6 nanosheets, are prepared by a facile microwave-hydrothermal method. The as-prepared Sb2WO6 is firstly applied as an anode material for sodium ion batteries (SIBs), which shows superior cycle stability and rate capability, delivering a reversible capacity of ∼350 mA h/g after 100 cycles at 200 mA/g and even ∼285 mA h/g at a high rate of 2 A/g. The sodium storage mechanism is revealed via ex-situ transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses, which is based on the reversible alloying/dealloying reaction (Sb + 3Na+ + 3e↔ Na3Sb) and the reversible conversion reaction (Na2WO4 + 6 Na+ + 6e- ↔ W + 4 Na2O) in the ternary oxide of Sb2WO6. The different sodiation/desodiation reactions in the Sb2WO6 electrode happens in a step-wise manner owing to the different working potentials, which thus alleviate the volume change induced pulverization and synergistically contribute to the superior sodium storage performance.

Research Area(s)

  • alloying/dealloying, conversion reaction, hierarchical Sb2WO6 nanostructures, microwave hydrothermal synthesis, sodium storage mechanism

Citation Format(s)

Microwave-Hydrothermal Synthesis of Hierarchical Sb2WO6 Nanostructures as a New Anode Material for Sodium Storage. / Wang, Ping; Xie, Sanmu; She, YiYi et al.
In: Chemistryselect, Vol. 4, No. 3, 23.01.2019, p. 1078-1083.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review