Effect of Substitution (Ta, Al, Ga) on the Conductivity of Li7La3Zr2O12

Abstract

Cubic garnets of composition Li6.75La3Zr1.75Ta0.25O12, Li6.15La3Zr1.75Ta0.25Al0.2O12, and Li6.15La3Zr1.75Ta0.25Ga0.2O12 were prepared from a co-precipitated precursor and consolidated by hotpressing to a relative density of 96 98%. The total Li-ion conductivities at 298 K and activation energies (in parentheses) of Li6.75La3Zr1.75Ta0.25O12, Li6.15La3Zr1.75Ta0.25Al0.2O12 and Li6.15La3Zr1.75Ta0.25Ga0.2O12 were 0.87 mS cm 1 (0.22 eV), 0.37 mS cm 1 (0.30 eV) and 0.41 mS cm 1 (0.27 eV), respectively. The above results suggest that cubic stabilizing substitutions outside of the Li-ion sub-lattice are preferable to obtain faster Li-ion conductivity.

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Document Details

Document Type
Technical Report
Publication Date
Jan 30, 2012
Accession Number
ADA579638

Entities

People

  • E. Rangasamy
  • J. L. Allen
  • J. Sakamoto
  • J. Wolfenstine

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Chemical Engineering
  • Chemistry
  • Crystal Chemistry
  • Diffraction
  • Grain Boundaries
  • Heat Of Activation
  • High Density
  • High Voltage
  • Hot Pressing
  • Materials
  • Materials Science
  • Military Research
  • Molecular Dynamics
  • Sintering
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Powder metallurgy of Titanium alloys.