Unraveling Atomic-Scale Origins of Selective Ionic Transport Pathways and Sodium-Ion Storage Mechanism in Bi2S3 Anodes

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

18 Scopus Citations
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Author(s)

  • Ran Cai
  • Jinhua Zhou
  • Kaishuai Yang
  • Linfeng Sun
  • Le Yang
  • Leguan Ran
  • Ruiwen Shao
  • Toshio Fukuda
  • Guoqiang Tan
  • Haodong Liu
  • Jiayu Wan
  • Qiaobao Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2200995
Journal / PublicationSmall Methods
Volume6
Issue number11
Online published17 Oct 2022
Publication statusPublished - 18 Nov 2022

Link(s)

Abstract

It is a major challenge to achieve a high-performance anode for sodium-ion batteries (SIBs) with high specific capacity, high rate capability, and cycling stability. Bismuth sulfide, which features a high theoretical specific capacity, tailorable morphology, and low cost, has been considered as a promising anode for SIBs. Nevertheless, due to a lack of direct atomistic observation, the detailed understanding of fundamental intercalation behavior and Bi2S3's (de)sodiation mechanisms remains unclear. Here, by employing in situ high-resolution transmission electron microscopy, consecutive electron diffraction coupled with theoretical calculations, it is not only for the first time identified that Bi2S3 exhibits specific ionic transport pathways preferred to diffuse along the (110) direction instead of the (200) plane, but also tracks their real-time phase transformations (de)sodiation involving multi-step crystallographic tuning. The finite-element analysis further disclosed multi-reaction induced deformation and the relevant stress evolution originating from the combined effect of the mechanical and electrochemical interaction. These discoveries not only deepen the understanding of fundamental science about the microscopic reaction mechanism of metal chalcogenide anodes but also provide important implications for performance optimization.

Research Area(s)

  • Bi2S3, in situ transmission electron microscopy, ionic transport, phase transformation, sodium-ion batteries

Citation Format(s)

Unraveling Atomic-Scale Origins of Selective Ionic Transport Pathways and Sodium-Ion Storage Mechanism in Bi2S3 Anodes. / Cai, Ran; Zhang, Wenqi; Zhou, Jinhua et al.
In: Small Methods, Vol. 6, No. 11, 2200995, 18.11.2022.

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

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