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

Figure 1

Comparison of crystal structure, morphology, and electrochemical properties of Li₇La₃Zr₂O₁₂ pellets with excess Li contents of 1.0, 1.03, 1.1, 1.13, 1.16, and 1.2: (a) XRD patterns for sintered Li₇La₃Zr₂O₁₂ pellets with varying excess Li contents ranging from 1.0 to 1.2; (b) EDS mapping of Ga based on the top view of the pellet. Scale bar indicates 25 μm; (c) the Nyquist plots and (d) the corresponding ionic conductivities of Li₇La₃Zr₂O₁₂ pellets with different excess Li contents.

(a)

(b)

(c)

(d)