Enhanced Li+ storage properties of few-layered MoS2-C composite microspheres embedded with Si nanopowder

Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A few-layered MoS2-C composite material is studied as a supporting material for silicon nanopowder. Microspheres of the few-layered MoS2-C composite embedded with 30 wt.% Si nanopowder are prepared by one-pot spray pyrolysis. The Si nanopowder particles with high capacity are completely surrounded by the few-layered MoS2-C composite matrix. The discharge capacities of the MoS2-C composite microspheres with and without 30 wt.% Si nanopowder after 100 cycles are 1,020 and 718 mAh·g−1 at a current density of 1,000 mA·g−1, respectively. The spherical morphology of the MoS2-C composite microspheres embedded with Si nanopowder is preserved even after 100 cycles because of their high structural stability during cycling. The MoS2-C composite layer prevents the formation of unstable solid-electrolyte interface (SEI) layers on the Si nanopowder. Furthermore, as the MoS2-C composite matrix exhibits high capacity and excellent cycling performance, these characteristics are also reflected in the MoS2-C composite microspheres embedded with 30 wt.% Si nanopowder. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)2492-2502
Number of pages11
JournalNano Research
Volume8
Issue number8
DOIs
Publication statusPublished - 2015 Aug 17

Keywords

  • anode material
  • lithium batteries
  • molybdenum sulfide
  • silicon
  • spray pyrolysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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