Abstract Herein nanocrystalline MoSi2 with enhanced lithium storage was successfully synthesized via a sol-gel and carbonthermal reduction method. Reduction of the gel mixture of Mo precursor and Si precursor by carbon at a desired temperature resulted in the formation of MoSi2 nanoparticles. The gel mixture was obtained through the hydrolysis of TEOS and ammonium molybdate and the polymerization of hydrolysis products of TEOS. The reducing agent carbon was produced via decarburition of sucrose's hydrolysis products, which have been wrapped in the gel during its formation process. Addition of HCl to the mixed solution controlled the hydrolysis and polymerization rate, and enabled the formation of a gel mixture with homogeneously distributed hydrolysis products of ammonium molybdate, TEOS and sucrose. This achievement likely generates a novel route to synthesize non-oxide compounds such as silicide, carbide through the sol–gel and carbonthermal reduction process. In addition, the as-received MoSi2 nanoparticles showed considerable activities in the reversible lithiation and delithiation process. When using as an anode for Li-ion batteries, MoSi2 nanoparticles delivered a specific capacity of 325 mAh g−1 at C/12 and showed an increasing capacity with cycling.

中文翻译：

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溶胶-凝胶和碳热还原法制备具有增强锂存储能力的纳米晶MoSi 2

摘要 本文通过溶胶-凝胶和碳热还原法成功合成了具有增强锂存储能力的纳米晶MoSi2。在所需温度下用碳还原 Mo 前体和 Si 前体的凝胶混合物导致形成 MoSi 2 纳米颗粒。凝胶混合物是通过TEOS和钼酸铵的水解和TEOS水解产物的聚合得到的。还原剂碳是通过蔗糖水解产物脱碳产生的，在其形成过程中已经包裹在凝胶中。向混合溶液中加入 HCl 可以控制水解和聚合速率，并能够形成具有均匀分布的钼酸铵、TEOS 和蔗糖水解产物的凝胶混合物。这一成就可能为通过溶胶-凝胶和碳热还原工艺合成硅化物、碳化物等非氧化物化合物提供了一条新途径。此外，原样的 MoSi2 纳米颗粒在可逆锂化和脱锂过程中表现出相当大的活​​性。当用作锂离子电池的阳极时，MoSi2 纳米颗粒在 C/12 下提供 325 mAh g-1 的比容量，并随着循环显示出增加的容量。