Effect of isovalent substitution on the structure and ionic conductivity of Li0.5 − yNayLa0.5□Nb2O6

Effect of isovalent substitution on the structure and ionic conductivity of Li0.5 − yNayLa0.5□Nb2O6

We have synthesized Li 0.5 − y Na y La 0.5 □Nb 2 O 6 defect perovskite solid solutions with 0 ≤ y ≤ 0.5. Their structure has been shown to undergo partial disordering with increasing sodium content. Lithium ion diffusion in the Li 0.5 − y Na y La 0.5 □Nb 2 O 6 system exhibits no percolation effects....

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Veröffentlicht in:Inorganic materials 2011-03, Vol.47 (3), p.308-312
Hauptverfasser: Belous, A. G., Gavrilenko, O. N., V’yunov, O. I., Kobilyanskaya, S. D., Trachevskii, V. V.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Ion concentration
Ion diffusion
Ionic conductivity
Lithium
Materials Science
Percolation
Perovskites
Sodium
Solid solutions
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Zusammenfassung:We have synthesized Li 0.5 − y Na y La 0.5 □Nb 2 O 6 defect perovskite solid solutions with 0 ≤ y ≤ 0.5. Their structure has been shown to undergo partial disordering with increasing sodium content. Lithium ion diffusion in the Li 0.5 − y Na y La 0.5 □Nb 2 O 6 system exhibits no percolation effects. The ionic conductivity as a function of sodium content has a maximum due to two competing factors: the increase in perovskite cell volume and the decrease in lithium ion concentration.
ISSN:0020-1685
1608-3172
DOI:10.1134/S002016851103006X