Lithium Ion Conductors Based on System (Li,Na,La){Ti,Nb,Та}O with Perovskite Structure

Abstract:

Solid solutions with defect perovskite structure have been obtained in the systems Li_0,5-уNa_yLa_0,5TiO₃, Li_0.5-yNa_yLa0.5◊Nb₂O₆ and Li_0.5-yNa_yLa0.5◊Та₂O₆ at 0 ≤ y ≤ 0.5. Their structure has been shown to undergo partial disordering with increasing sodium content in the system Li_0.5-yNa_yLa0.5◊Nb₂O₆ as in the system Li_0.5-yNa_yLa0.5◊Та₂O₆ structure has been ordering. Lithium diffusion in system Li_0,5-уNa_yLa_0,5TiO₃ follows a percolation model for the lithium diffusion. The ionic conductivity as a function of sodium content in the system Li_0.5-yNa_yLa0.5◊Nb₂O₆ has a maximum. The ionic conductivity of Li_0.5-yNa_yLa0.5◊Ta₂O₆ samples decreases with sodium content.

• Periodical: Solid State Phenomena (Volume 200)
• Pages: 279-285
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.200.279
• Online since: April 2013
• Authors: S.D. Kobylianska, Oleg I. V'yunov, Anatolii G. Belous, O. Bohnke
• Keywords: Ionic Conductivity, Niobates, Solid-State Reaction, Tantalates, Titanate

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