Enhanced cycling performance of an Fe0/Fe3O4 nanocomposite electrode for lithium-ion batteries
- Enhanced cycling performance of an Fe0/Fe3O4 nanocomposite electrode for lithium-ion batteries
- 이광희; 박재관; 성윤모; 정경윤; 조원일; 김동완
- hydrogen reduction process; core-shell nanostructure; FeOOH precursor; nanocomposite electrode
- Issue Date
- VOL 20, 295205-1-295205-5
- 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.
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