Stabilization of Li₇La₃Zr₂O₁₂ Solid Electrolyte through Ga-Based Precipitates and the Ga–Au Surface Layer

Figure 3

Mechanism of precipitation in Ga/Al/Ta-doped Li₇La₃Zr₂O₁₂ electrolyte: (a) EDS mapping images for the Li₇La₃Zr₂O₁₂ powder with 0.142 Ga doping, annealed at temperatures of 900, 1000, 1100, and 1250°C; (b) cross-sectional SEM and EDS mapping images for the entire Li₇La₃Zr₂O₁₂ pellets with Ga concentrations of 0 and 0.142 after sintering at 1250°C; (c) schematic of the Ga precipitation mechanism.

(a)

(b)

(c)