The ionic conductivity of the Li₇P₂S₈I·xLi₄SiO₄ (x = 5, 10, 20, 30) solid electrolytes at 25 °C before and after Electrochemical Impedance Spectroscopy (EIS) measurements.

Li7P2S8I·xLi4SiO4	Ionic conductivity at 25 °C before EIS (mS cm−1)	Ionic conductivity at 25 °C after EIS (mS cm−1)
x = 5	0.35	—
x = 10	0.52	1.4
x = 20	0.46	0.46
x = 30	0.11	0.18