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首页> 外文期刊>RSC Advances >Fabrication of a reversible SnS2/RGO nanocomposite for high performance lithium storage
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Fabrication of a reversible SnS2/RGO nanocomposite for high performance lithium storage

机译：用于高性能锂储存的可逆SNS2 / RGO纳米复合材料的制备

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摘要

SnS2/graphene (SnS2/G) composites have been explored extensively as a promising candidate for Lithium Ion Battery (LIB) anodes in recent years. Previously, the SnS2 conversion/reduction step of the reaction mechanism is generally believed to be irreversible or only partially reversible, which severely underestimates the theoretical capacity of SnS2. In this work, SnS2 nanoparticles have been successfully stacked on reduced graphene oxide (RGO) via a facile and effective solvothermal method using ethylene glycol as a chelant. The SnS2/graphene nanocomposite retained many of the original 2D characteristics of the graphene nanosheets. As a result, Li+ storage properties were significantly improved. The SnS2/RGO nanocomposites show a higher storage capacity of 939.0 mA h g(-1) after 30 cycles at a current density of 0.1 A g(-1), and a long-term cycle capacity of 615.5 mA h g(-1) even after 200 cycles at 1 A g(-1). The superior cycling stability of the SnS2/RGO electrode is attributed to greater reversibility in the initial conversion reaction, ascribed to the presence of the Sn nanoparticles.
机译：SNS2 /石墨烯（SNS2 / G）复合材料已被广泛探讨，作为近年来锂离子电池（Lib）阳极的有希望的候选者。以前，通常认为反应机制的SNS2转换/还原步骤是不可逆的或仅部分可逆的，这严重低估了SNS2的理论能力。在该作品中，SNS2纳米颗粒通过使用乙二醇作为螯合剂，通过容易和有效的溶剂质方法成功地堆叠在氧化物氧化物（RGO）上。 SNS2 /石墨烯纳米复合材料保留了石墨烯纳米片的原始2D特性。结果，Li +储存性能显着提高。 SNS2 / RGO纳米复合材料在30次循环的电流密度为0.1Ag（-1）的30次循环后，较高的储存容量为939.0 mA Hg（-1），即使是615.5 mA Hg（-1）的长期循环能力均匀在1A（-1）时200次循环。 SNS2 / RGO电极的优异循环稳定性归因于初始转化反应中的更大可逆性，归因于Sn纳米粒子的存在。

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  • 来源
    《RSC Advances》 |2016年第38期|共8页
  • 作者

    Yan Shancheng; Li Keyu; Lin Zixia; Song Haizeng; Jiang Tian; Wu Jiansheng; Shi Yi;

  • 作者单位

    Nanjing Univ Posts &

    Telecommun Sch Geog &

    Biol Informat Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Univ Posts &

    Telecommun Sch Geog &

    Biol Informat Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Univ Sch Elect Sci &

    Engn Natl Lab Solid State Microstruct Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Posts &

    Telecommun Sch Geog &

    Biol Informat Nanjing 210023 Jiangsu Peoples R China;

    Natl Univ Def Technol Coll Optoelect Sci &

    Engn Changsha 410073 Hunan Peoples R China;

    Nanjing Univ Posts &

    Telecommun Sch Geog &

    Biol Informat Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Univ Sch Elect Sci &

    Engn Natl Lab Solid State Microstruct Nanjing 210093 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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