Mechanistic Origin of the High Performance of Yolk@Shell Bi 2 S 3 @N-Doped Carbon Nanowire Electrodes

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

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Author(s)

  • Longze Zhao
  • Hong-Hui Wu
  • Chenghao Yang
  • Qiaobao Zhang
  • Guiming Zhong
  • Zhiming Zheng
  • Huixin Chen
  • Jinming Wang
  • Kai He
  • Baolin Wang
  • Ting Zhu
  • Meilin Liu
  • Ming-Sheng Wang

Detail(s)

Original languageEnglish
Pages (from-to)12597-12611
Journal / PublicationACS Nano
Volume12
Issue number12
Publication statusPublished - 26 Dec 2018
Externally publishedYes

Abstract

High-performance lithium-ion batteries are commonly built with heterogeneous composite electrodes that combine multiple active components for serving various electrochemical and structural functions. Engineering these heterogeneous composite electrodes toward drastically improved battery performance is hinged on a fundamental understanding of the mechanisms of multiple active components and their synergy or trade-off effects. Herein, we report a rational design, fabrication, and understanding of yolk@shell Bi 2 S 3 @N-doped mesoporous carbon (C) composite anode, consisting of a Bi 2 S 3 nanowire (NW) core within a hollow space surrounded by a thin shell of N-doped mesoporous C. This composite anode exhibits desirable rate performance and long cycle stability (700 cycles, 501 mAhg -1 at 1.0 Ag -1 , 85% capacity retention). By in situ transmission electron microscopy (TEM), X-ray diffraction, and NMR experiments and computational modeling, we elucidate the dominant mechanisms of the phase transformation, structural evolution, and lithiation kinetics of the Bi 2 S 3 NWs anode. Our combined in situ TEM experiments and finite element simulations reveal that the hollow space between the Bi 2 S 3 NWs core and carbon shell can effectively accommodate the lithiation-induced expansion of Bi 2 S 3 NWs without cracking C shells. This work demonstrates an effective strategy of engineering the yolk@shell-architectured anodes and also sheds light onto harnessing the complex multistep reactions in metal sulfides to enable high-performance lithium-ion batteries.

Research Area(s)

  • in situ experiments, lithiation mechanism, lithium-ion battery, multiple computational modeling, yolk, shell composite anode

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Mechanistic Origin of the High Performance of Yolk@Shell Bi 2 S 3 @N-Doped Carbon Nanowire Electrodes. / Zhao, Longze; Wu, Hong-Hui; Yang, Chenghao; Zhang, Qiaobao; Zhong, Guiming; Zheng, Zhiming; Chen, Huixin; Wang, Jinming; He, Kai; Wang, Baolin; Zhu, Ting; Zeng, Xiao Cheng; Liu, Meilin; Wang, Ming-Sheng.

In: ACS Nano, Vol. 12, No. 12, 26.12.2018, p. 12597-12611.

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