Deep hydration of an Li_7-3xLa₃Zr₂M^III_xO₁₂ solid-state electrolyte material: a case study on Al- and Ga-stabilized LLZO.

ABSTRACT: Single crystals of an Li-stuffed, Al- and Ga-stabilized garnet-type solid-state electrolyte material, Li₇La₃Zr₂O₁₂ (LLZO), have been analysed using single-crystal X-ray diffraction to determine the pristine structural state immediately after synthesis via ceramic sintering techniques. Hydrothermal treatment at 150 °C for 28 d induces a phase transition in the Al-stabilized compound from the commonly observed cubic Ia-3d structure to the acentric I-43d subtype. Li^I ions at the interstitial octahedrally (4 + 2-fold) coordinated 48e site are most easily extracted and Al^III ions order onto the tetrahedral 12a site. Deep hydration induces a distinct depletion of Li^I at this site, while the second tetrahedral site, 12b,

SUBMITTER: Redhammer GJ 

PROVIDER: S-EPMC8725724 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature