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A novel method to synthesize SnP2O7 spherical particles for lithium-ion battery anode

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Abstract

For the urgent demand of higher capacity of lithium-ion battery anode, tin pyrophosphate has attracted more and more attention because of its high theoretical capacity, cheapness, and no toxicity. However, production of stable mesoporous sphere structure and improvement of electrochemical performance remain a challenge. Here, SnP2O7 spherical particles were successfully prepared through spray drying method with SnCl4·5H2O and C2H8O7P2. Crystallization and microstructure were investigated by TG-DSC, XRD, SEM, and TEM. With the obtained mesoporous SnP2O7 particles after carbon coating, it demonstrates a high initial capacity reaching up to 1218 mAh g−1 and a significantly stable cycling performance with 620 mAh g−1 after 80 deep electrochemical cycles.

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Acknowledgments

This research was supported by the Jiangsu Province Prospective Joint Research on Pilot Project (No. BY2013072-03), a Grant for State Key Program for Basic Research of China (Nos. 2013CB632702, 2012CB921503), the National Natural Science Foundation of China (No. 11134006), a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), a Project of Free Exploration funded by the National Laboratory of Solid State Microstructures, Test Foundation of Nanjing University.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, China

    Tongfu Wu, Gaole Dai, Cancan Qin, Jiali Cao, YueFeng Tang & YanFeng Chen

  2. SuZhou Sun Sources Nano Science and Technology Co. Ltd., ChangShu, SuZhou, 215513, China

    YueFeng Tang

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  1. Tongfu Wu
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  2. Gaole Dai
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  3. Cancan Qin
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  4. Jiali Cao
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  5. YueFeng Tang
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Correspondence to YueFeng Tang.

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Wu, T., Dai, G., Qin, C. et al. A novel method to synthesize SnP2O7 spherical particles for lithium-ion battery anode. Ionics 22, 2315–2319 (2016). https://doi.org/10.1007/s11581-016-1773-3

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  • DOI: https://doi.org/10.1007/s11581-016-1773-3

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