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Influence of Cationic Vacancies on the Mobility of Li+ Ions in Some Cation-Deficient Materials. An NMR Study

✍ Scribed by L. Latie; G. Villeneuve; Ch. Cros; P. Hagenmuller

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 437 KB
Volume: 128
Category: Article
ISSN: 0370-1972
DOI: 10.1002/pssb.2221280212

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✦ Synopsis

Abstract

^7^Li NMR is carried out between 150 and 450 K in Li‐deficient chlorides with LiCl‐type or the related Suzuki‐type structure. Diffusive motion of Li^+^ ions is observed and the analysis of experimental data for Li~1−2__x__~Mg~x~Cl with x = 0.01 shows that the introduction of 1% vacancies into the lattice enhances the Li^+^ mobility by a factor of 30 at 440 K. By increasing the number of vacancies, the activation energy decreases down to 0.38 eV for ordered Li~6~VCl~8~ which contains 12.5% vacancies and even to 0.25 eV for the disordered phase corresponding to the same composition.

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