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Adjusting Crystal Orientation to Promote Sodium-Ion Transport in V5S8@Graphene Anode Materials for High-Performance Sodium-Ion Batteries

Authors
  • Tang, Lin-Bo
  • Li, Pei-Yao
  • Cui, Ru-De
  • Peng, Tao
  • Wei, Han Xin
  • Wang, Zhen-Yu
  • Wang, Hai-Yan
  • Yan, Cheng
  • Mao, Jing
  • Dai, Ke-Hua
  • Chen, He-Zhang
  • Zhang, Xia Hui
  • Zheng, Jun-Chao
Publication Date
Feb 17, 2023
Source
Queensland University of Technology ePrints Archive
Keywords
License
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Abstract

Sodium-ion batteries (SIBs) have inspired the potential for widespread use<br/>in energy storage owing to the advantages of abundant resources and low<br/>cost. Benefiting from the layered structure, 2D-layered materials enable<br/>fast interlayer transport of sodium ions and thus are considered promising<br/>candidates as anodes for SIBs. Herein, a strategy of adjusting crystal orientation<br/>is proposed via a solvothermal method to improve sodium-ion transport<br/>at the edge of the interlayers in 2D-layered materials. By introducing<br/>surfactants and templates, the 2D-layered V5S8 nanosheets are controlled<br/>to align the interlayer diffusion channels vertically to the surface, which<br/>promotes the fast transport of Na+ at the edge of the interlayers as revealed<br/>by experimental methods and ab initio calculations. Benefiting from the<br/>aligned crystal orientation and rGO coating, the vertical-V5S8@rGO hybrid<br/>delivers a high initial discharge capacity of 350.6 mAh g−1 at a high current<br/>density of 15 A g−1. This work provides a strategy for the structural design<br/>of 2D-layered anode materials by adjusting crystal orientation, which<br/>demonstrates the promise for applications in fast-charging alkaline-ion<br/>batteries.

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