Gwang-Hee Lee et al 2009 Nanotechnology 20 295205 doi:10.1088/0957-4484/20/29/295205
Gwang-Hee Lee1,2, Jae-Gwan Park1, Yun-Mo Sung2, Kyung Yoon Chung3, Won Il Cho3 and Dong-Wan Kim4,5
Show affiliationsWe demonstrate the formation of a highly conductive, Fe0/Fe3O4 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 Fe2O3/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/Fe3O4 nanocomposite electrode shows excellent capacity retention (~540 mA h g−1 after 100 cycles at a rate of 185 mA g−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.
82.47.Aa Lithium-ion batteries
Issue 29 (22 July 2009)
Received 19 April 2009, in final form 7 June 2009
Published 1 July 2009
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