Catalyst-free formation of silicon nanowires and their application as anodes of lithium ion batteries

在不添加金属催化剂的情况下，以硅、二氧化硅及其混合物为靶材进行激光汽化。通过对激光汽化产物的分析，发现尖端含有硅纳米粒子的非晶氧化硅纳米线是由硅和混合靶生长而成的。我们提出了一种不需要金属催化剂的生长机制。我们还评估了纳米线作为下一代锂离子电池的负极材料。纳米线具有良好的充放电性能。

Laser vaporization was performed using targets of silicon, silicon dioxide, and their mixture without the addition of metal catalysts. From the analysis of the laser-vaporization products, amorphous silicon oxide nanowires having silicon nanoparticles at their tips were found to be grown form silicon and mixed targets. We proposed a novel growth mechanism without the contribution of metal catalysts. We also evaluated the nanowires as an anode material of a next-generation lithium ion battery. The nanowires showed a promising high charge-discharge capacity.