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Assembly of Tin Oxide/Graphene Nanosheets into 3D Hierarchical Frameworks for High-Performance Lithium Storage

Authors

  • Yanshan Huang,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
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    • These authors contributed equally to this work.

  • Dr. Dongqing Wu,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
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    • These authors contributed equally to this work.

  • Dr. Sheng Han,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
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  • Shuang Li,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
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  • Li Xiao,

    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
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  • Dr. Fan Zhang,

    Corresponding author
    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
    • School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)

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  • Prof. Xinliang Feng

    Corresponding author
    1. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)
    2. Max Planck Institute for Polymer Research, Mainz 55128 (Germany)
    • School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China)

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Abstract

3D hierarchical tin oxide/graphene frameworks (SnO2/GFs) were built up by the in situ synthesis of 2D SnO2/graphene nanosheets followed by hydrothermal assembly. These SnO2/GFs exhibited a 3D hierarchical porous architecture with mesopores (≈3 nm), macropores (3–6 μm), and a large surface area (244 m2 g−1), which not only effectively prevented the agglomeration of SnO2 nanoparticles, but also facilitated fast ion and electron transport in 3D pathways. As a consequence, the SnO2/GFs exhibited a high capacity of 830 mAh g−1 for up to 70 charge–discharge cycles at 100 mA g−1. Even at a high current density of 500 mA g−1, a reversible capacity of 621 mAh g−1 could be maintained for SnO2/GFs with excellent cycling stability. Such performance is superior to that of previously reported SnO2/graphene and other SnO2/carbon composites with similar weight contents of SnO2.

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