A new concept for obtaining SnO2 fiber-in-tube nanostructures with superior electrochemical properties

Young Jun Hong, Ji Wook Yoon, Jong Heun Lee, Yun Chan Kang

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Tin oxide (SnO2) nanotubes with a fiber-in-tube structure have been prepared by electrospinning and the mechanism of their formation has been investigated. Tin oxide-carbon composite nanofibers with a filled structure were formed as an intermediate product, which were then transformed into SnO2 nanotubes with a fiber-in-tube structure during heat treatment at 500°C. Nanofibers with a diameter of 85 nm were found to be located inside hollow nanotubes with an outer diameter of 260 nm.The prepared SnO2 nanotubes had well-developed mesopores.The discharge capacities of the SnO2 nanotubes at the 2nd and 300th cycles at a current density of 1 Ag-1 were measured as 720 and 640 mAhg-1, respectively, and the corresponding capacity retention measured from the 2nd cycle was 88%.The discharge capacities of the SnO2 nanotubes at incrementally increased current densities of 0.5, 1.5, 3, and 5 Ag-1 were 774, 711, 652, and 591 mAhg-1, respectively.The SnO2 nanotubes with a fiber-in-tube structure showed superior cycling and rate performances compared to those of SnO2 nanopowder.The unique structure of the SnO2 nanotubes with a fiber@void@tube configuration improves their electrochemical properties by reducing the diffusion length of the lithium ions, and also imparts greater stability during electrochemical cycling.

Original languageEnglish
Pages (from-to)371-376
Number of pages6
JournalChemistry - A European Journal
Volume21
Issue number1
DOIs
Publication statusPublished - 2015 Jan 2

Keywords

  • Anode materials
  • Cyclic voltammetry
  • Electrospinning
  • Lithium-ion batteries
  • Nanotubes
  • Tin oxide

ASJC Scopus subject areas

  • Chemistry(all)

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