锂插入TiS_2的阴极反应过程及其相应的结构变化研究

本文从 ＴｉＳ２和 ＬｉｘＴｉＳ２的电子衍射花样和 Ｘ－射线衍射谱分析得出 Ｌｉ＋插入ＴｉＳ２的阴极反应过程。 Ｌｉ＋先插入 ＴｉＳ２，而后有序化形成 ＬｉＴｉＳ２相。由 Ｘ－射线衍射数据分析得出，新相 ＬｉＴｉＳ２的重复周期 Ｉｃ＝１８．４０Ａ。电子衍射花样表明过量 Ｔｉ形成了超点阵，Ｔｉ在点阵中形成钉扎。伏安循环曲线表明过量Ｔｉ阻止Ｌｉ的插入和移出 ＴｉＳ２本文否定了 Ｌｉ＋插入 ＴｉＳ２只形成一级的 ＬｉｘＴｉＳ２的结论。

Study on Cathode Reaction Process of L i~+ Inserted in TiS_2 and its Structure Change

This paper describes the study on the cathode reaction process of Li+ inserted in TiS2, through x-ray diffraction and transmission electron microscope. According to experiment results, cathode reaction process is given. Li+ was inserted in TiS2, first, then it carries out the ordering and forms a new LiTiS2, phase. Its period is 18.40 A (Ic=18.40 A ). The electron diffraction patterns show that the over-stoichiometric Li forms superlattice structure. Residual Ti atoms act as pins in the lattice. The cyclic y-A curves of Li/TiS2 secondary cell show that over-stoichiometric Ti prevents Li + from inserting in Tis and removing Li+ from it. This paper indicates that the formation of only the first stage Lix TiS2 structure after inserting Li+ in Tis2, is not correct.