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Solid State Reaction Synthesis and Characterization of Lithium Lanthanum Titanate Lithium-Ion Conducting Solid Electrolyte with Different Li to La Content

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Abstract:

Lithium Lanthanum Titanate, Li3xLa(2/3)-x□(1/3)-2xTiO3, with three different compositions of (i) x = 0.097 (Li0.29La0.57TiO3), (ii) x = 0.117 (Li0.35La0.55TiO3), and (iii) x = 0.167 (Li0.50La0.50TiO3) were prepared via solid state reaction synthesis sintered at 1150 °C for 36 hours. X-ray diffraction (XRD) analysis revealed that all samples can be indexed to a cubic perovskite structure with lattice parameter a of about 3.86 Å. Morphological analysis using SEM showed that the samples are relatively dense and the calculated relative density of the LLTO samples range from about 94% to as high as 99% with increasing trend as Li content increases. Room temperature conductivity and its temperature dependence up to 120 °C were investigated. LLTO sample with x =0.117 revealed the highest total ionic conductivity at room temperature of about 1.69 x 10-03 S/cm which can be a promising solid electrolyte for an all-solid-state lithium-ion batteries.

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Key Engineering Materials IX View Preview

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Periodical:

Key Engineering Materials (Volume 821)

Pages:

389-394

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.821.389

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Online since:

September 2019

Authors:

Andrew Dono, Rinlee Butch M. Cervera*

Keywords:

Conductivity, Density, Lithium Lanthanum Titanate, LLTO, Solid Electrolyte

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© 2019 Trans Tech Publications Ltd. All Rights Reserved

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