Effects of B-site Ion(Al, Cr) Substitution on the Ionic Conductivity of Li3xLa2/3-xTiO3

Abstract

Abstract: The effect of B-Site aliovalent ion (Al, Cr) substitution on the ionic conductivity of Li_3xLa_2/3-xTiO₃
was investigated. The results show that partial substitution of smaller Al³⁺ for Ti⁴⁺ is effective to enhance the ionic conductivity of Li_3xLa{_2/3-xTiO₃.
At 300K, the maximum bulk conductivity of (1.58±0.01)×10^-3S·cm^-1 observed from the composition of (Li_0.39La_0.54)_1+y/2Al_yTi_1-yO₃
with y=0.02(x=0.13), is the highest yet reported for known perovskite solutions at room temperature. The conductivity enhancement is due to the
substitution-induced bond strength change rather than due to bottleneck size change for Li migration, TiO₆-octahedron tilting or A-site cation ordering.

Key words: Li_3xLa_2/3-xTiO₃, lithium ion conductor, ionic conductivity, perovskite

CLC Number:

TM24

HE Lian-Xing,YOO Han-Ill,LI Yi. Effects of B-site Ion(Al, Cr) Substitution on the Ionic Conductivity of Li_3xLa_2/3-xTiO₃[J]. Journal of Inorganic Materials.

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Effects of B-site Ion(Al, Cr) Substitution on the Ionic Conductivity of Li_3xLa_2/3-xTiO₃

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