TY - JOUR
T1 - Sol-gel synthesis and lithium ion conduction properties of garnet-type Li 6BaLa 2Ta 2O 12
AU - Kokal, I.
AU - Ramanujachary, K. V.
AU - Notten, P. H.L.
AU - Hintzen, H. T.
N1 - Funding Information:
This work was supported by Dutch Technology Foundation STW (Project 07796). The authors would like to thank Anneke Delsing and Marcel Vliex for their technical supports.
PY - 2012/8
Y1 - 2012/8
N2 - 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.
AB - 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.
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U2 - 10.1016/j.materresbull.2012.04.032
DO - 10.1016/j.materresbull.2012.04.032
M3 - Article
AN - SCOPUS:84861606336
SN - 0025-5408
VL - 47
SP - 1932
EP - 1935
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 8
ER -