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Synthesis and electrochemical properties of graphene-SnS2 nanocomposites for lithium-ion batteries

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Abstract

Graphene-SnS2 nanocomposites were prepared via a solvothermal method with different loading of SnS2. The nanostructure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The XRD patterns revealed that hexagonal SnS2 was obtained. SEM and TEM results indicated that SnS2 particles distributed homogeneously on graphene sheets. The electrochemical properties of the samples as active anode materials for lithium-ion batteries were examined by constant current charge–discharge cycling. The composite with weight ratio between graphene and SnS2 of 1:4 had the highest rate capability among all the samples and its reversible capacity after 50 cycles was 351 mAh/g, which was much higher than that of the pure SnS2 (23 mAh/g). With graphene as conductive matrix, homogeneous distribution of SnS2 nanoparticles can be ensured and volume changes of the nanoparticles during the charge and discharge processes can be accomodated effectively, which results in good electrochemical performance of the composites.

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Acknowledgments

This work was supported by China Postdoctoral Science Foundation (no. 20100471296), Postdoctoral Foundation of Jiangsu Province (no. 1001003C), and National Nature Science Foundation of China (nos. 60928009, 61076017, and 60990314).

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Authors and Affiliations

  1. National Laboratory of Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China

    Chenfei Shen, Luyao Ma, Mingbo Zheng, Bin Zhao, Danfeng Qiu, Lijia Pan & Yi Shi

  2. Nanomaterials Research Institute, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Chenfei Shen & Jieming Cao

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  1. Chenfei Shen
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  2. Luyao Ma
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  3. Mingbo Zheng
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  4. Bin Zhao
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  5. Danfeng Qiu
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  6. Lijia Pan
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  7. Jieming Cao
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  8. Yi Shi
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Correspondence to Mingbo Zheng or Yi Shi.

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Shen, C., Ma, L., Zheng, M. et al. Synthesis and electrochemical properties of graphene-SnS2 nanocomposites for lithium-ion batteries. J Solid State Electrochem 16, 1999–2004 (2012). https://doi.org/10.1007/s10008-011-1602-6

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  • DOI: https://doi.org/10.1007/s10008-011-1602-6

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