Fe3O4/Fe/Carbon Composite and Its Application as Anode Material for Lithium-Ion Batteries

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• 作者：Xiuyun Zhao ; Dingguo Xia ; Kun Zheng
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：March 28, 2012
• 年：2012
• 卷：4
• 期：3
• 页码：1350-1356
• 全文大小：538K
• 年卷期：v.4,no.3(March 28, 2012)
• ISSN：1944-8252

文摘

A plum pudding-like Fe₃O₄/Fe/carbon composite was synthesized by a sol鈥揼el polymerization followed by a heat-treatment process and characterized by X-ray diffraction, Raman spectroscopic analysis, thermogravimetric analysis, scanning electron microscopy with energy-dispersive spectroscopy, transmission electron microscopy, and electrochemical test. In this composite, uniform spherical Fe₃O₄/Fe nanoparticles of about 100 nm were embedded into carbon matrix with high monodispersion. As-prepared Fe₃O₄/Fe/carbon composite electrode exhibits a stable and reversible capacity of over 600 mA h g^鈥? at a current of 50 mA g^鈥? between 0.002 V and 3.0 V, as well as excellent rate capability. The plum pudding-like structure, in which trace Fe promotes conductivity and carbon matrix mediates the volume change, can enhance the cycling performance and rate capability of Fe₃O₄ electrode. This unique structure is valuable for the preparation of other electrode materials.

Keywords:

Fe₃O₄/Fe/carbon composite; plum pudding-like structure; anode material; lithium ion battery