IN-SITU FTIR SPECTROELECTROCHEMICAL STUDIES OF SURFACE-FILMS FORMED ON LI AND NONACTIVE ELECTRODES AT LOW POTENTIALS IN LI SALT-SOLUTIONS CONTAINING CO2

被引:77
作者
AURBACH, D
CHUSID, O
机构
[1] Department of Chemistry, Bar-llan University
关键词
D O I
10.1149/1.2221034
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Surface films formed on Li and noble metal electrodes at low potentials in salt solutions saturated with CO2 were investigated using in situ Fourier transform infrared spectroscopy (FTIRS). Two methods have been used: subtractively normalized interfacial FTIRS (SNIFTIRS)-type measurements, external reflectance mode (thin layer cell configuration) and internal reflectance mode. The solutions used included LiAsF6 in propylene carbonate, tetrahydrofurane, and methylformate. It was found that Li2CO3 is a major surface species formed, and its precipitation suppresses solvent-related surface reactions on the active electrode surfaces. A coproduct of Li carbonate seems to be CO gas.
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页码:L155 / L157
页数:3
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