Hydrothermal Synthesis of SnO2 Embedded MoO3-x Nanocomposites and Their Synergistic Effects on Lithium Storage

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Daxian Cao
  • Hongkang Wang
  • Beibei Li
  • Chao Li
  • Sanmu Xie
  • Chunming Niu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)79-87
Journal / PublicationElectrochimica Acta
Volume216
Publication statusPublished - 20 Oct 2016

Abstract

We demonstrate a facile hydrothermal synthesis of SnO2/MoO3-x nanocomposites with ultrafine SnO2 crystallites uniformly embedded into an amorphous MoO3-x matrix, which demonstrate superior electrochemical performance as anodes for lithium ion batteries, including long-term cycling stability (953 mA h/g after 100 cycles at 200 mA/g), high rate capability (668.0 mA h/g after 1000 cycles at 1000 mA/g) and high initial Coulombic efficiency (81.3% at 200 mA/g). Synergistic effects of the both components SnO2 and MoO3-x on the lithium storage are revealed by electrochemical characterization and supported by TEM and XPS analysis performed at the different discharge/charge states of the respective electrodes. SnO2 nanocrystallites confined within the amorphous MoO3-x matrix efficiently buffer the volume changes of Li-Sn alloying-dealloying upon cycling, while the metallic Mo in situ generated by a conversion reaction of MoO3-x promotes the reversible reaction SnO2 + Li+ ↔ Sn + Li2O. In addition, the amorphous MoO3-x with bulk or surface defects allows for a better lithium insertion and thus enhanced capacity.

Research Area(s)

  • electrochemical performance, lithium storage mechanism, SnO2/MoO3-x nanocomposites, synergistic effect

Citation Format(s)

Hydrothermal Synthesis of SnO2 Embedded MoO3-x Nanocomposites and Their Synergistic Effects on Lithium Storage. / Cao, Daxian; Wang, Hongkang; Li, Beibei; Li, Chao; Xie, Sanmu; Rogach, Andrey L.; Niu, Chunming.

In: Electrochimica Acta, Vol. 216, 20.10.2016, p. 79-87.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review