Silicon And Silicide Nanowire Arrays' Synthesis And Application In Lithium-ion Batteries

One-dimensional nanomaterials have attracted world-wide attention due to their good electrical, optical and magnetic properties. Silicon is a type of basic and wonderful material in modern microelectronic industry. Therefore silicon nanowires and its compounds nanowires have attracted great interest. Although many studies have been done on silicon nanowires and silicide nanowires, the growth mechanism and the applications still need further investigations.In this paper, we have successfully prepared Si nanowire arrays and Ni₂Si nanowire arrays through chemical vapor deposition. The as-synthesized nanowire arrays have been applied as anode materials of Li-battery.1. Silicon nanowire arrays have been synthesized through a simple chemical vapor deposition method. The effect of the substrate temperature, silane concentration, and different growth time on the morphology of silicon nanowires has been studied. The growth mechanism of silicon nanowire arrays based on our experimental results has been explained. Finally, the nanowires arrays have been used as lithium-ion battery anode material, which shows a high reversible capacity and excellent cycling performance.2. Nickel silicide nanowire arrays with different diameters on Ni foil have been synthesized through a simple chemical vapor deposition method. The effect of the substrate temperature, silane concentration, and different growth time on the morphology of silicon nanowires has been studied. The as-synthesized nanowires arrays have been applied as lithium-ion battery anode material. It is indicated that the nickel silicide nanowire arrays shows good cycling properties. Furthermore, it is pointed out that smaller diameter Ni₂Si nanowires possess better discharge capacity because of their larger surface area.