Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 42, Pages 22692-22698Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm34373h
Keywords
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Funding
- City University of Hong Kong [7008080, 7002741, 9667056]
- National Natural Science Foundation of China [21001117/B0107]
- HKSAR RGC GRF grant [CityU 100510]
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Rugated porous Fe3O4 thin films were synthesized by a facile multi-pulse electrochemical anodization method. The fabricated Fe3O4 films are directly grown on Fe, featuring nano-channels with periodically rugated channel walls running throughout the film thickness direction. Electrochemical measurements show that the as-prepared Fe3O4 films readily serve as high-performance anode materials for lithium ion batteries with a specific capacity of 1100, 880 and 660 mA h g(-1) at 0.1, 0.2, and 0.5 C, respectively, which compared favorably with the conventional straight-channel counterparts fabricated by DC anodization. Moreover, the cycling capability test of the novel electrode at 0.1 C for 100 cycles shows a steady charge/discharge platform, indicating a high cycling stability and structural robustness. The observed improvements of the rugated Fe3O4 films as lithium ion battery anode materials are attributed to their special periodic rugated nanostructures.
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