摘要
应用Ｘ射线衍射分析（ＸＲＤ）、Ｘ射线光电子能谱分析（ＸＰＳ）和三角波电位扫描研究了Ｌｉ／α－Ｓｎ（ＨＰＯ４）２电池的阴极反应机理．实验结果表明，电池反应的实质是锂在正极内进行电化学嵌入，并在达到一定的嵌入度后析出新相Ｓｎ．应用电化学暂态方法测得嵌入的锂离子于正极内部的化学扩散系数约为１０－１２～１０－１３ｃｍ２·ｓ－１．
The discharge mechanism of Li/αSn(HPO4)2 cell has been investigated by means of Xray diffraction, XPS and cyclic voltammetry methodes. It has been shown that the electrochemical intercalation reation exists in the cathode material. There is a new phase after some degree of intercalation. With potential step and galvanostatic techniques, the chemical diffusion cofficients of Li+ in LixSn(HPO4)2 is estimated to be 10-12～10-13 cm2·s-1.
出处
《电化学》
CAS
CSCD
1997年第4期378-382,共5页
Journal of Electrochemistry
关键词
锂电池
反应机理
正极材料
二次锂电池
Li/αSn(HPO4)2 cell, reaction mechanism, intercalation reaction
