Wintersweet‐Flower‐Like CoFe2O4/MWCNTs Hybrid Material for High‐Capacity Reversible Lithium Storage |
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| Authors: | Ying Wang Jinsoo Park Bing Sun Prof Hyojun Ahn Prof Guoxiu Wang |
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| Institution: | 1. Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, Sydney, NSW 2007 (Australia), Fax: (+61)?2‐9514‐1656;2. School of Materials Science and Engineering, Gyeongsang National University, 900 Gazwa‐dong, Jinju, Gyeongnam 600‐701 (South Korea) |
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| Abstract: | CoFe2O4/multiwalled carbon nanotubes (MWCNTs) hybrid materials were synthesized by a hydrothermal method. Field emission scanning electron microscopy and transmission electron microscopy analysis confirmed the morphology of the as‐prepared hybrid material resembling wintersweet flower “buds on branches”, in which CoFe2O4 nanoclusters, consisting of nanocrystals with a size of 5–10 nm, are anchored along carbon nanotubes. When applied as an anode material in lithium ion batteries, the CoFe2O4/MWCNTs hybrid material exhibited a high performance for reversible lithium storage. In particular, the hybrid anode material delivered reversible lithium storage capacities of 809, 765, 539, and 359 mA h g?1 at current densities of 180, 450, 900, and 1800 mA g?1, respectively. The superior performance of CoFe2O4/MWCNTs hybrid materials could be ascribed to the synergistic pinning effect of the wintersweet‐flower‐like nanoarchitecture. This strategy could also be applied to synthesize other metal oxide/CNTs hybrid materials as high‐capacity anode materials for lithium ion batteries. |
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| Keywords: | electrochemistry hybrid materials lithium ion batteries nanostructures nanotubes |
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