Abstract
Two-dimensional nanosheets and their assembles have attracted considerable attention as high-performance anode materials for Li-ion batteries because of their short transport lengths and robust structures. In this work, Fe3O4 hierarchical structures assembled by porous ultrathin nanosheets are prepared from the topochemical conversion of Fe-glycolate precursor obtained via a facile refluxing process. The flower-like hierarchical nanostructures have a size of ~ 2.5 µm constructed from ultrathin nanosheet building blocks with thickness of ca. 10 nm. When used as an anode electrode, the as-prepared Fe3O4 hierarchical nanostructures demonstrate excellent electrochemical properties with a reversible and stable capacity as high as 964.3 mAh g−1 at 500 mA g−1 after 100 cycles, and superior rate capability of 487 mAh g−1 at a high current density of 8 A g−1.
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Acknowledgements
The authors greatly appreciate Prof. X.W. Lou and Dr. Le Yu at Nanyang Technological University for kindly support to this work.
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Supplementary material 1. The Supporting Information is available online including FE-SEM and TEM images of Fe-glycolate precursor, SEM images of Fe-glycolate precursor without PVP, TGA curve and BET analysis of Fe3O4 hierarchical structures. (DOCX 4425 KB)
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Ma, FX., Sun, XY., Zhang, BY. et al. Topochemical synthesis of ultrathin nanosheet-constructed Fe3O4 hierarchical structures as high-performance anode for Li-ion batteries. J Mater Sci: Mater Electron 29, 7805–7810 (2018). https://doi.org/10.1007/s10854-018-8779-8
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DOI: https://doi.org/10.1007/s10854-018-8779-8