Fig. 3: Measured ionic conductivity of as-synthesized NASICONs.

Scatter plots of room-temperature (~25 °C) conductivities (log scale, upper panel) fitted from Nyquist plots (Supplementary Fig. 3) and activation energies (lower panel) extracted from the linear fitting of the Arrhenius plots (Supplementary Fig. 6). The bulk properties are indicated by blue circles, whereas the total properties are indicated by orange ones. On the x-axis, the compounds are grouped by polyanion chemistry, and in each group, compounds are ordered by increasing average metal radius (\({\bar{r}}_{M}\), in Å). \({\bar{r}}_{M}\) of each compound is also labeled in the bottom panel.