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Issue 15, 2011
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Fe3O4 nanoparticle-integrated graphene sheets for high-performance half and full lithium ion cells

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Abstract

We synthesized Fe3O4 nanoparticle/reduced graphene oxide (RGO-Fe3O4) nanocomposites and evaluated their performance as anodes in both half and full coin cells. The nanocomposites were synthesized through a chemical co-precipitation of Fe2+ and Fe3+ in the presence of graphene oxides within an alkaline solution and a subsequent high-temperature reduction reaction in argon (Ar) environment. The morphology and microstructures of the fabricated RGO-Fe3O4 nanocomposites were characterized using various techniques. The results indicated that the Fe3O4 nanoparticles had relatively homogeneous dispersions on the RGO sheet surfaces. These as-synthesized RGO-Fe3O4 nanocomposites were used as anodes for both half and full lithium-ion cells. Electrochemical measurement results exhibit a high reversible capacity which is about two and a half times higher than that of graphite-based anodes at a 0.05C rate, and an enhanced reversible capacity of about 200 mAh g−1 even at a high charge/discharge rate of 10C (9260 mA g−1) in half cells. Most important of all, these fabricated novel nanostructures also show exceptional capacity retention with the assembled RGO-Fe3O4/LiNi1/3Mn1/3Co1/3O2 full cell at different C rates. This outstanding electrochemical behavior can be attributed to the unique microstructure, morphology, texture, surface properties of the nanocomposites, and combinative effects from the different chemical composition in the nanocomposites.

Graphical abstract: Fe3O4 nanoparticle-integrated graphene sheets for high-performance half and full lithium ion cells

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Publication details

The article was received on 21 Feb 2011, accepted on 25 Feb 2011 and first published on 14 Mar 2011


Article type: Paper
DOI: 10.1039/C1CP20455F
Phys. Chem. Chem. Phys., 2011,13, 7170-7177

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    Fe3O4 nanoparticle-integrated graphene sheets for high-performance half and full lithium ion cells

    L. Ji, Z. Tan, T. R. Kuykendall, S. Aloni, S. Xun, E. Lin, V. Battaglia and Y. Zhang, Phys. Chem. Chem. Phys., 2011, 13, 7170
    DOI: 10.1039/C1CP20455F

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