Neutron Powder Diffraction Study on Al and Ga in Mixed Doped Li5.8Ga0.4-xAlxLa3Zr2O12 Garnet Solid Solutions with x = 0.0—0-0.04
Cubic Al or Ga doped Li7La3Zr2O12 (LLZO) garnets are the most promising candidates to be used as solid electrolyte in both lithium-ion and Li-oxygen batteries. The location of the dopants in the garnet structure is expected to strongly correlate with the Li-ion transport properties of LLZO. In order to proof this assumption, we systematically varied the site occupation of 24d and 96h sites. This was done by synthesizing mixed-doped Li5.8Ga0.4-xAlxLa3Zr2O12 garnet solid solutions with x = 0.0—0.4. Indeed, preliminary 7Li MAS NMR measurements show that reducing the 24d site occupation leads to an increase of Li-ion dynamics. For quantification, neutron powder diffraction measurements are needed to get the exact portion of the 24d and 96h occupations. With the obtained data we will finally be able to understand how the 24d or 96h site occupancies influence ionic conductivity.
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RETTENWANDER Daniel; AMTHAUER Georg; REDHAMMER Guenther; SUARD Emmanuelle and WAGNER Reinhard. (2015). Neutron Powder Diffraction Study on Al and Ga in Mixed Doped Li5.8Ga0.4-xAlxLa3Zr2O12 Garnet Solid Solutions with x = 0.0—0-0.04. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-22-735
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