期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 12, 页码 5560-5567出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm15955d
关键词
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资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [PolyU5187/09E]
- Hong Kong Polytechnic University [A-PL16, G-YX3T]
- National Key Technology Research and Development Program of China [2007BAE12B01]
Rational design and engineering of materials and/or structures for novel electrodes leading to next-generation lithium-ion batteries with high energy and power densities is a major challenge to the ever-growing needs of the electronic and automobile industries. To tackle this issue, we have designed a new type of 3D anode by anodization of iron foil to form a highly ordered Fe3O4 nanotube array directly on a low-cost current collector (Fe foil) followed by carbonization of pre-adsorbed glucose on the nanotube array at 500 degrees C. In such an electrode, each part plays its desired role, with the Fe foil being a low cost and stable current collector, Fe3O4 working as a high-capacity active material, and the carbon coating forming an electron conducting network and stable solid electrolyte interface. High capacity (1020 mu A h cm(-2) at 20 mu A cm(-2)) and high rate capability (176 mu A h cm(-2) at 1000 mu A cm(-2)) were achieved in this newly designed electrode. Overall, the results described in this work provide a promising route to facile and large-scale production of a low-cost 3D composite electrode with enhanced electrochemical performance.
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