Onion-like crystalline WS2 nanoparticles anchored on graphene sheets as high-performance anode materials for lithium-ion batteries

Inha Kim, Sung Woo Park, Dong-Wan Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this study, onion-like crystalline WS2 nanoparticles uniformly anchored on graphene sheets (WS2@Gs) were prepared via ball milling using WO3 nanoparticles and graphene and subsequent sulfidation. They were then employed as high-performance anode materials for Li-ion batteries (LIBs). The ball-milling process facilitated uniform anchoring of WO3 nanoparticles with a diameter of ∼15 nm on graphene nanosheets without aggregation, and the subsequent sulfidation caused phase transition of the WO3 nanoparticles to WS2 nanoparticles with an onion-like crystal lattice structure. As anode materials for LIB, the uniquely structured WS2@Gs nanocomposites exhibited excellent Li-ions storage performance, with a high reversible capacity of 587.1 mA h g−1 at a current density of 200 mA g−1. To enhance the cyclic stability of WS2@Gs, the C-coating method was employed by simply adding glucose during ball milling. Even at a high current density of 1000 mA g−1, the C-coated WS2@Gs (C@WS2@Gs) electrode exhibited a remarkably high reversible capacity of 371.9 mA h g−1 and appreciable cycling stability, with a high capacity retention of 62% without any drastic capacity fading after 500 cycles.

Original languageEnglish
Article number122033
JournalChemical Engineering Journal
Volume375
DOIs
Publication statusPublished - 2019 Nov 1

Keywords

  • Carbon coating
  • Electrical explosion of wire process
  • Lithium-ion battery
  • Nanocomposite
  • Tungsten disulfide

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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