Abstract Silicon has been regarded as a promising alternative anode material for next-generation lithium ion batteries (LIBs) due to its high theoretical specific capacity of 3590 mAh g−1 (Li3.75Si formed at room temperature). In this work, nanoscale silicon has been synthesized via a simple and effective metathesis reaction in which SiCl4 is the silicon source and Zn is the reductant and solvent, at a mild temperature of 500 °C. The preparation process is very simple, facile and low-cost. The as-prepared silicon particles are spherical with a diameter of 150–200 nm, and the delithiation capacity of the nanoscale silicon can reach 1747.7 mAh g−1 at a current density of 0.2 A g−1.

中文翻译：

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通过温和的温度复分解路线轻松制备纳米硅作为锂离子电池的负极材料

摘要 硅由于具有 3590 mAh g-1 的高理论比容量（室温下形成的 Li3.75Si），被认为是下一代锂离子电池（LIBs）的一种有前途的替代负极材料。在这项工作中，纳米级硅是通过简单有效的复分解反应在 500 °C 的温和温度下合成的，其中 SiCl4 是硅源，Zn 是还原剂和溶剂。制备过程非常简单、容易且成本低。所制备的硅颗粒为球形，直径为 150-200 nm，在 0.2 A g-1 的电流密度下，纳米级硅的脱锂容量可达 1747.7 mAh g-1。