Abstract
AbstractIn this paper, α‐Fe2O3 hollow spheres in different sizes were successfully synthesized through a glycerol emulsion template method for use as efficient electrode materials in lithium‐ion batteries. The sizes of α‐Fe2O3 hollow sphere could be easily controlled by adjusting the amount of glycerol over the Fe precursor during the hydrothermal synthesis process. A thin carbon layer was subsequently coated on the surface of α‐Fe2O3 hollow spheres through hydrothermal treatment with glucose for the carbonization process, in which the carbon phases could serve as a conductive layer for the efficient charge transfer, but also as a buffer layer for the accommodation of volume vibration of the electrode material during cycling. The carbon‐coated α‐Fe2O3 hollow sphere electrode showed a high discharge capacity of approximately 1452 mAh g−1 with a capacity increase of at least 32 % compared to that of α‐Fe2O3 hollow spheres without the carbon coating at the 50th cycle. The stability and cycling performance were also significantly improved by the presence of the carbon layer, indicating that the C/α‐Fe2O3 hollow sphere could be a promising metal‐oxide anode material for lithium‐ion batteries.
Published Version
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