Transformation of SnS nanocompisites to Sn and S nanoparticles during lithiation

Haokun Deng, Thapanee Sarakonsri, Tao Huang, Aishui Yu, Katerina Aifantis

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

SnS nanomaterials have a high initial capacity of 1000 mAh g−1; however, this cannot be retained throughout electrochemical cycling. The present study provides insight into this capacity decay by examining the effect that Li intercalation has on new SnS nanoflowers attached on carbon substrates such as artificial graphite. Scanning and transmission electron microscopy reveal that lithiation of such materials disrupts their initial morphology and produces free‐standing Sn and SnS nanoparticles that dissolve in the electrolyte and disperse uniformly over the entire electrode surface. As a result, the SnS is rendered inactive after initial cycling and contributes to the formation of the solid electrolyte interface layer, resulting in continuous capacity decay during long term cycling. This is the first study that illustrates the morphological effects that the conversion mechanism has on SnS anodes. In order to fully utilize SnS materials, it is necessary to isolate them from the electrolyte by fully encapsulating them in a matrix.

Original languageEnglish (US)
Article number145
Pages (from-to)1-12
Number of pages12
JournalCrystals
Volume11
Issue number2
DOIs
StatePublished - Jan 2021

Keywords

  • Anode
  • Conversion reaction
  • Lithium ion battery
  • Nanoflower
  • Tin sulfide

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Inorganic Chemistry

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