Yucheng Dong, Ruguang Ma, Mingjun Hu
May 1, 2013
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Influential Citations
38
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Journal
Journal of Solid State Chemistry
Abstract
Abstract We report a scalable strategy to synthesize Fe 3 O 4 /graphene nanocomposites as a high-performance anode material for lithium ion batteries. In this study, ferric citrate is used as precursor to prepare Fe 3 O 4 nanoparticles without introducing additional reducing agent; furthermore and show that such Fe 3 O 4 nanoparticles can be anchored on graphene sheets which attributed to multifunctional group effect of citrate. Electrochemical characterization of the Fe 3 O 4 /graphene nanocomposites exhibit large reversible capacity (∼1347 mA h g −1 at a current density of 0.2 C up to 100 cycles, and subsequent capacity of ∼619 mA h g −1 at a current density of 2 C up to 200 cycles), as well as high coulombic efficiency (∼97%), excellent rate capability, and good cyclic stability. High resolution transmission electron microscopy confirms that Fe 3 O 4 nanoparticles, with a size of ∼4–16 nm are densely anchored on thin graphene sheets, resulting in large synergetic effects between Fe 3 O 4 nanoparticles and graphene sheets with high electrochemical performance.