LITHIUM INSERTION IN INDIUM SELENIDE FILMS - APPLICATION TO MICROBATTERIES

Indium selenide films are formed on silica slides and silicon material source stoichiometry is modified to obtain In(p)Se(q) films with vari ous compositions. The structural and optical properties of indium sele nide films are reported. These characterizations have shown that, usin g different growth conditions, either single phases, such as InSe, In4 Se3 or In2Se3, are formed or a mixture of these compounds is present i n the film structure. The products are examined by X-ray diffraction, and Raman and IR spectroscopies. The electrochemical properties of lit hium-intercalated films are presented. It is observed that the morphol ogy and stoichiometry play an important role in the lithium insertion process. The thermodynamics and kinetics of the insertion reaction are reported. Li/Li+-borate glass/InSe microbatteries have been built, an d their characteristics are reported and discussed using a Butler-Volm er relationship.