Hematite nanoflakes as anode electrode materials for rechargeable lithium-ion batteries
Hematite (α-Fe 2O 3) nanoflakes and nanocubes were synthesized by liquid–solid-solution method and their properties as anode electrode materials for rechargeable Li +-ion batteries were measured. When changing the water to ethanol volume ratio in the synthesis system, the nanocrystals can be changed...
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Veröffentlicht in: | Electrochimica acta 2010-03, Vol.55 (9), p.3089-3092 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Hematite (α-Fe
2O
3) nanoflakes and nanocubes were synthesized by liquid–solid-solution method and their properties as anode electrode materials for rechargeable Li
+-ion batteries were measured. When changing the water to ethanol volume ratio in the synthesis system, the nanocrystals can be changed from α-Fe
2O
3 to α-FeOOH, with shapes being tuned from nanoflakes to nanocubes, non-uniform particles and nanowires. When assembled as the anode electrode materials in rechargeable Li
+-ion batteries, the hematite nanoflakes showed one more plateau in the first discharge progress of the voltage–composition curves than hematite nanocrystals with other shapes in the literature. X-ray diffraction, high-resolution transmission electron microscope and electrochemical data showed that this extra plateau came from the formation of Li
2Fe
3O
4 nanoclusters and amorphous Li
2O. This experiment showed that like sizes, shapes of nanocrystals may also affect the detailed electrochemical progress. |
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ISSN: | 0013-4686 1873-3859 |
DOI: | 10.1016/j.electacta.2010.01.016 |