Electrochemical properties of tin oxide flake/reduced graphene oxide/carbon composite powders as anode materials for lithium-ion batteries

Su Min Lee, Seung Ho Choi, Yun Chan Kang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Hierarchically structured tin oxide/reduced graphene oxide (RGO)/carbon composite powders are prepared through a one-pot spray pyrolysis process. SnO nanoflakes of several hundred nanometers in diameter and a few nanometers in thickness are uniformly distributed over the micrometer-sized spherical powder particles. The initial discharge and charge capacities of the tin oxide/RGO/carbon composite powders at a current density of 1000 mAg-1 are 1543 and 1060 mAhg-1, respectively. The discharge capacity of the tin oxide/RGO/carbon composite powders after 175 cycles is 844 mAhg-1, and the capacity retention measured from the second cycle is 80 %. The transformation during cycling of SnO nanoflakes, uniformly dispersed in the tin oxide/RGO/carbon composite powder, into ultrafine nanocrystals results in hollow nanovoids that act as buffers for the large volume changes that occur during cycling, thereby improving the cycling and rate performances of the tin oxide/RGO/carbon composite powders.

Original languageEnglish
Pages (from-to)15203-15207
Number of pages5
JournalChemistry - A European Journal
Volume20
Issue number46
DOIs
Publication statusPublished - 2014 Nov 10

Keywords

  • Energy conversion
  • Energy-storage materials
  • Graphene
  • Nanostructures
  • Synthesis design

ASJC Scopus subject areas

  • Chemistry(all)

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