Sol-gel synthesis and lithium ion conduction properties of garnet-type Li 6BaLa 2Ta 2O 12

I. Kokal, K. V. Ramanujachary, P. H.L. Notten, H. T. Hintzen

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29 Scopus citations

Abstract

High lithium ion conductive garnet-type barium lanthanum lithium tantalate, Li 6BaLa 2Ta 2O 12 (LLBTO), was prepared by a modified sol-gel Pechini method from the appropriate mixtures of lithium carbonate, lanthanum oxide, barium carbonate and tantalum ethoxide. The thermal decomposition of the precursor powder was investigated by TG/DTA analysis. The LLBTO precursor powders were annealed at various temperatures between 923 and 1123 K for 6 h in air. The transformation process from precursor powder to crystalline garnet-like phase was analyzed by X-ray powder diffraction (XRPD). The morphology of the powders annealed at various temperatures was investigated by scanning electron microscopy (SEM). The resultant pelletized Li 6BaLa 2Ta 2O 12, prepared by sol-gel synthesis method, shows a total Li-ion conductivity of 1.69 × 10 -5 S/cm at 298 K and an activation energy is 0.40 eV. The ionic conductivities reported in this study are slightly higher than those reported for LLBTO sample synthesized by conventional solid state synthesis route.

Original languageEnglish (US)
Pages (from-to)1932-1935
Number of pages4
JournalMaterials Research Bulletin
Volume47
Issue number8
DOIs
StatePublished - Aug 2012

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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