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首页> 外文期刊>Energy & environmental science >Layered phosphorus-like GeP5: a promising anode candidate with high initial coulombic efficiency and large capacity for lithium ion batteries
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Layered phosphorus-like GeP5: a promising anode candidate with high initial coulombic efficiency and large capacity for lithium ion batteries

机译：层状磷状GeP5：具有高初始库仑效率和锂离子电池大容量的有希望的阳极候选物

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摘要

In this work, we for the first time investigate GeP5 as an anode material for lithium ion batteries (LIBs). Using a facile high energy mechanical ball milling (HEMM) method, we successfully synthesize pure GeP5 and GeP5/C nanocomposite at ambient temperature and pressure. According to XRD Rietveld refinement and first principle calculations, GeP5 possesses a two-dimensional layered structure similar to that of black P and graphite, and a high conductivity that is 10 000 and 10 times that of black P and graphite, respectively. Serving as novel anode materials, both GeP5 and its carbon composite deliver an unprecedented high reversible capacity of ca. 2300 mA h g(-1), combined with a high initial coulombic efficiency of ca. 95%. Ex situ XRD and CV tests demonstrate that GeP5 undergoes conversion and alloying type lithium storage mechanism and that its capacity is co-contributed to by both the Ge and P components. In addition, GeP5/C exhibits superior cycle stability and excellent high-rate performance with a capacity of 2127 mA h g(-1) at 5 A g(-1). These properties suggest the promising application of these anode materials in next-generation high-energy and high-power LIBs.
机译：在这项工作中，我们首次研究了GeP5作为锂离子电池（LIB）的负极材料。使用简便的高能机械球磨（HEMM）方法，我们成功地在环境温度和压力下合成了纯GeP5和GeP5 / C纳米复合材料。根据XRD Rietveld的改进和第一性原理计算，GeP5具有类似于黑色P和石墨的二维分层结构，其高电导率分别是黑色P和石墨的10 000和10倍。作为新型阳极材料，GeP5及其碳复合材料均可提供前所未有的高可逆容量。 2300 mA h g（-1），结合约200的高初始库仑效率。 95％。异位XRD和CV测试表明，GeP5经历了转化和合金化的锂存储机制，并且其容量由Ge和P组分共同贡献。此外，GeP5 / C具有出色的循环稳定性和出色的高速率性能，在5 A g（-1）时的容量为2127 mA h g（-1）。这些特性表明，这些负极材料在下一代高能量和高功率LIB中的应用前景广阔。

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  • 来源
    《Energy & environmental science》 |2015年第12期|3629-3636|共8页
  • 作者

    Li Wenwu; Li Huiqiao; Lu Zhijuan; Gan Lin; Ke Linbo; Zhai Tianyou; Zhou Haoshen;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China;

    Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058568, Japan;

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