Electrostatic Self-Assembly of Fe 3 O 4 Nanoparticles on Graphene Oxides for High Capacity Lithium-Ion Battery Anodes

Taegyune Yoon, Jaegyeong Kim, Jinku Kim and Jung Kyoo Lee
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Taegyune Yoon: Department of Chemical Engineering, Dong-A University, Busan 604-714, Korea
Jaegyeong Kim: Department of Chemical Engineering, Dong-A University, Busan 604-714, Korea
Jinku Kim: Department of Bio and Chemical Engineering, Hongik University, Sejong 339-701, Korea
Jung Kyoo Lee: Department of Chemical Engineering, Dong-A University, Busan 604-714, Korea

Energies, 2013, vol. 6, issue 9, 1-11

Abstract: Magnetite, Fe 3 O 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 3 O 4 nanoparticles, composites comprising Fe 3 O 4 nanoparticles and graphene sheets (GS) were fabricated. The Fe 3 O 4 /GS composite disks of mm dimensions were prepared by electrostatic self-assembly between negatively charged graphene oxide (GO) sheets and positively charged Fe 3 O 4 -APTMS [Fe 3 O 4 grafted with (3-aminopropyl)trimethoxysilane (APTMS)] in an acidic solution (pH = 2) followed by in situ chemical reduction. Thus prepared Fe 3 O 4 /GS composite showed an excellent rate capability as well as much enhanced cycling stability compared with Fe 3 O 4 electrode. The superior electrochemical responses of Fe 3 O 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 3 O 4 /GS composite for high capacity lithium-ion battery application.

Keywords: lithium-ion battery; anode; iron oxide; magnetite; graphene; self-assembly (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
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