Pentapyridinium 18-Silver Iodide, a "Two-Dimensional" Solid Electrolyte

The new solid electrolyte pentapyridinium 18-silver iodide, ${\left({\mathrm{C}}_5{\mathrm{H}}_5\mathrm{N}\mathrm{H}\right)}_5$ ${\mathrm{Ag}}_{18}$ ${\mathrm{I}}_{23}$, effectively allows the current-carrying ${\mathrm{Ag}}^{+}$ ions to move in only two dimensions. Comparison with the other solid electrolyte in the ${\mathrm{C}}_5$ ${\mathrm{H}}_5$NHI-AgI system, namely (${\mathrm{C}}_5$ ${\mathrm{H}}_5$NH)${\mathrm{Ag}}_5$ ${\mathrm{I}}_6$, demonstrates that three-dimensionally interconnecting diffusion pathways are more favorable to high conductivity.