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Local and Translational Motion of the 6Li and 7Li Ions in the Li3Sc2(PO4)3 and Li3In2(PO4)3 Compounds

Published online by Cambridge University Press:  28 February 2011

Igor S. Pronin
Affiliation:
All—Union Scientific Research Institute of Inorganic Materials, ul.Rogova 5, Moscow 123060, USSR
Sergei E. Sigaryov
Affiliation:
Institute of Crystallography USSR Academy of Sciences, Leninsky pr.59, Moscow 117333, USSR
Andrei A. Vashman
Affiliation:
All—Union Scientific Research Institute of Inorganic Materials, ul.Rogova 5, Moscow 123060, USSR
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Abstract

Basing on impedance and NMR spectroscopy data it is shown that there are two types of lithium ion motion in the each polymorhic modification of the Li3 Sc2 (P04)3 and Li3 In2 (P04)3 solid electrolytes. First type is a translational motion of these ions which determines the a values, while the second one is Li ion motion within the lithium ion—ion pairs at the distance about the sum of two lithium ionic radii. Substitution of 7Li by 6Li leads to the mixed alkali effect—type behaviour of σ.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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