%0 Journal Article %T Electrostatic Self-Assembly of Fe3O4 Nanoparticles on Graphene Oxides for High Capacity Lithium-Ion Battery Anodes %A Taegyune Yoon %A Jaegyeong Kim %A Jinku Kim %A Jung Kyoo Lee %J Energies %D 2013 %I MDPI AG %R 10.3390/en6094830 %X Magnetite, Fe 3O 4 , is a promising anode material for lithium ion batteries due to its high theoretical capacity (924 mA h g £¿1), high density, low cost and low toxicity. However, its application as high capacity anodes is still hampered by poor cycling performance. To stabilize the cycling performance of Fe 3O 4 nanoparticles, composites comprising Fe 3O 4 nanoparticles and graphene sheets (GS) were fabricated. The Fe 3O 4/GS composite disks of mm dimensions were prepared by electrostatic self-assembly between negatively charged graphene oxide (GO) sheets and positively charged Fe 3O 4-APTMS [Fe 3O 4 grafted with (3-aminopropyl)trimethoxysilane (APTMS)] in an acidic solution (pH = 2) followed by in situ chemical reduction. Thus prepared Fe 3O 4/GS composite showed an excellent rate capability as well as much enhanced cycling stability compared with Fe 3O 4 electrode. The superior electrochemical responses of Fe 3O 4/GS composite disks assure the advantages of: (1) electrostatic self-assembly between high storage-capacity materials with GO; and (2) incorporation of GS in the Fe 3O 4/GS composite for high capacity lithium-ion battery application. %K lithium-ion battery %K anode %K iron oxide %K magnetite %K graphene %K self-assembly %U http://www.mdpi.com/1996-1073/6/9/4830