互不溶Sn-Al合金中自发生长Sn纳米线及其作为锂离子电池负极的电化学性能

本文介绍互不溶Sn-Al合金表面上Sn纳米线(直径为100 ～ 500 nm)自发生长的两种情况,它们都不需要模板和催化剂.通过SEM、TEM分析和对Al、Sn相的相互作用机理研究表明,这些Sn纳米线具有200]生长方向,它们的生长与Sn熔点和Al-Sn共晶点的差异,以及Sn-Al合金(块体、薄膜)中存在的残余压应力...

Sn nanowires self-grown on the immiscible Sn-Al alloys and their electrochemical properties as Li-ion battery anode

Sn nanowires,with diameter of 100-500 nm,have been grown on the surface of immiscible Sn-Al alloys by two new ways without templates and catalysts.The microstructures have been studied by SEM and TEM and the interaction mechanism between Al and Sn phases has been proposed.It is found that the Sn nanowires grow along direction and their growth is due to the difference between melt temperature of Sn and eutectic temperature of Al-Sn alloy,as well as the presence of residual compress stresses in the Sn-Al sinter and film.The Sn nanowires in the Sn-Al film are checked as electroactive materials for Li,which have a reversible capacity in the order of 300mAh/g by limiting the cycling voltage ranges between 0.3 and 1.5 V vs.Li/Li＋.Comparing with pure Sn film electrode,the one dimensional（1D） characteristic of the Sn nanowires facilitate Li ion diffusion kinetics and enhanced the electrochemical properties associated with the Sn-Al film electrode containing Sn nanowires.