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Simple Solvent-Free Synthesis of Iron-Oxide/Graphene Nanocomposite As Anode Material in Li-Ion Secondary Batteries

Wednesday, May 14, 2014
Grand Foyer, Lobby Level (Hilton Orlando Bonnet Creek)
B. Jang (Seoul National University, Advanced Institutes of Convergence Technology), S. K. Park (Seoul National University), and Y. Piao (Seoul National University, Graduate School of Convergence Science and Technology)
Herein, we show a simple solvent-free synthesis of a nanostructured material, composed of uniform sized iron oxide nanoparticles and graphene, for high performance Li-ion secondary battery. The iron-oxide/graphene nanocomposite was directly obtained by heat treatment of a mixture of iron-oleate and graphene. The experimental results showed that uniform sized γ-Fe2O3 nanoparticles were homogeneously embedded in the graphene layers, and they acted as mutual spacers in the nanocomposite to prevent the restacking of the graphene layers and the nanoparticle’s aggregation. As anode material in Li-ion battery, the iron-oxide/graphene nanocomposite exhibits outstanding electrochemical performance due to the synergetic effects of the monodisperse iron oxide nanoparticles and well dispersed graphene. The synthetic procedure is easy to scale up and expected to be extended to prepare other hybrid nanocomposite materials.