Enhanced cycling performance of an Fe0/Fe3O4 nanocomposite electrode for lithium-ion batteries

Title
Enhanced cycling performance of an Fe0/Fe3O4 nanocomposite electrode for lithium-ion batteries
Authors
이광희박재관성윤모정경윤조원일김동완
Keywords
hydrogen reduction process; core-shell nanostructure; FeOOH precursor; nanocomposite electrode
Issue Date
2009-07
Publisher
Nanotechnology
Citation
VOL 20, 295205-1-295205-5
Abstract
We 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 inH2 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.
URI
http://pubs.kist.re.kr/handle/201004/35645
ISSN
0957-4484
Appears in Collections:
KIST Publication > Article
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