Journal
JOURNAL OF POWER SOURCES
Volume 206, Issue -, Pages 315-319Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.01.131
Keywords
Garnet; Li; Ta; Cubic; Ionic conductivity; Hot-pressing
Funding
- US Army Research Laboratory (ARL)
- US Army Research Office (ARO)
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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 hot-pressing to a relative density of similar to 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. Published by Elsevier B.V.
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