Abstract
Morphology-controlled preparation of a-Fe2O3 has been successfully realized by evaporating aqueous FeCl3 solution. By just simply changing the reaction temperature and time, nanorods, peanut-like and sphere-like morphologies, of a-Fe2O3 could be obtained. The elemental nanorods have a width range of 10–20 nm. On the basis of time-dependent experiments, the formation mechanisms of various nanostructures were proposed. The dynamic formation process showed that with increasing reaction temperature, the outward bending played critical role on the morphology evolution. Furthermore, when tested as anodes, the as-obtained a-Fe2O3 nanostructures showed structure-dependent electrochemical properties. Among them, the a-Fe2O3 nanorods exhibited ultrahigh reversible capacity and excellent capacity retention over 50 cycles.
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