Enhanced cycling performance of an Fe0/Fe3O 4 nanocomposite electrode for lithium-ion batteries

Gwang Hee Lee, Jae Gwan Park, Yun Mo Sung, Kyung Yoon Chung, Won Il Cho, Dong-Wan Kim

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

We demonstrate the formation of a highly conductive, Fe0/Fe 3O4 nanocomposite electrode by the hydrogen reduction process. Fe2O3 nanobundles composed of one-dimensional nanowires were initially prepared through thermal dehydrogenation of hydrothermally synthesized FeOOH. The systematic phase and morphological evolutions from Fe2O3 to Fe2O 3/Fe3O4, Fe3O4, and finally to Fe/Fe3O4 by the controlled thermochemical reduction at 300 °C in H2 were characterized using x-ray diffraction (XRD) and transmission electron microscopy (TEM). The Fe/Fe 3O4 nanocomposite electrode shows excellent capacity retention (∼540mAhg-1 after 100 cycles at a rate of 185mAg -1), compared to that of Fe2O3 nanobundles. This enhanced electrochemical performance in Fe/Fe3O4 composites was attributed to the formation of unique, core-shell nanostructures offering an efficient electron transport path to the current collector.

Original languageEnglish
Article number295205
JournalNanotechnology
Volume20
Issue number29
DOIs
Publication statusPublished - 2009 Jul 30

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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