CAJ | 학술논문

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有关.将含有Sn纳米线的Sn-Al薄膜作为锂离子电池负极材料进行电化学测试,在0.3～1.5 V vs.Li/Li+(Li/Li+为对电极和参比电极)电压范围循环时,它的稳定可逆容量为300 mAh/g.通过与纯Sn薄膜负极比较研究可知,Sn纳米线的一维特征有利于改善Li+的扩散动力学,从而提高Sn-Al薄膜电极的电化学性能.
본문개소호불용Sn-Al합금표면상Sn납미선(직경위100 ～ 500 nm)자발생장적량충정황,타문도불수요모판화최화제.통과SEM、TEM분석화대Al、Sn상적상호작용궤리연구표명,저사Sn납미선구유[200]생장방향,타문적생장여Sn용점화Al-Sn공정점적차이,이급Sn-Al합금(괴체、박막)중존재적잔여압응력유관.장함유Sn납미선적Sn-Al박막작위리리자전지부겁재료진행전화학측시,재0.3～1.5 V vs.Li/Li+(Li/Li+위대전겁화삼비전겁)전압범위순배시,타적은정가역용량위300 mAh/g.통과여순Sn박막부겁비교연구가지,Sn납미선적일유특정유리우개선Li+적확산동역학,종이제고Sn-Al박막전겁적전화학성능.
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[200]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 O.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.