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Li insertion in CuyTiS2 spinels

✍ Scribed by T. Jacobsen; B. Zachau-Christiansen; K. West; S. Atlung

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 403 KB
Volume: 34
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(89)87190-7

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✦ Synopsis

Li insertion in Cu,TiS, spinels at 120°C is investigated by constant current technique on samples of different stoichiometry. It is shown that each Cu present in the structure blocks two sites otherwise available for Li insertion. However, at potentials below 1.79 V vs Li the affinity for Li insertion expels Cu from the lattice and a separate metallic Cu phase is formed. The Cu phase is identified by X-ray analysis. Upon current reversal Li is reversibly extracalated and Cu slowly reinserted. In all cases the maximal Li insertion corresponds to the formation of the compound LiTiS,.

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