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Relationship Between Crystal Structure and Li+-Conductivity in La0.5 Li0.5TiO3 Perovskite

Published online by Cambridge University Press:  10 February 2011

J. A. Alonso ,
J. Ibarra ,
M. A. Paris ,
J. Sanz ,
J. Santamaria ,
C. LeÓn ,
A. Vdrez  and
M. T. Fermandez
J. A. Alonso
Affiliation:
Inst. Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
J. Ibarra
Affiliation:
Inst. Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
M. A. Paris
Affiliation:
Inst. Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
J. Sanz
Affiliation:
Inst. Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain
J. Santamaria
Affiliation:
F. C. Fisicas, Univ. Compl. Madrid, E-28040 Madrid., Spain
C. LeÓn
Affiliation:
F. C. Fisicas, Univ. Compl. Madrid, E-28040 Madrid., Spain
A. Vdrez
Affiliation:
E.P.S., Univ. Carlos III, E-28911 Legands, Spain
M. T. Fermandez
Affiliation:
Inst. Laue-Langevin, BP 156. F-38045 Grenoble Cedex 9, France
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Abstract

For the first time Li+ cations have been localized within the perovskite structure of the fast Liconductor La0 5Li0.5TiO3 from neutron powder diffraction data. Li cations are fourfold oxygen coordinated, located in the middle of the almost square windows determined by every four TiO6 octahedra, far away from the 12-fold coordinated La vacancy sites that, nevertheless, take part of the path for Li motion across the solid. The large multiplicity of the sites where Li reside (1/6 occupied) accounts for the huge ionic conductivity of this promising Li-conducting material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 575: Symposium CC – New Materials for Batteries & Fuel Cells , 1999 , 337
Copyright
Copyright © Materials Research Society 2000

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References

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