From Lithium to Proton Mobility in Garnet Electrolytes: An NMR and Conductivity Study of H 5.2 Li 1.3 La ₃ Zr 1.5 Ta 0.5 O ₁₂

Garnet-type oxides are among the most promising solid-state electrolytes owing to their high chemical stability and comparatively high lithium-ion conductivity. They may also provide a basis for proton conductors through...