Control of Ionic Conductivity by Lithium Distribution in Cubic Oxide Argyrodites Li_6+xP_1-xSi_xO₅Cl.

ABSTRACT: Argyrodite is a key structure type for ion-transporting materials. Oxide argyrodites are largely unexplored despite sulfide argyrodites being a leading family of solid-state lithium-ion conductors, in which the control of lithium distribution over a wide range of available sites strongly influences the conductivity. We present a new cubic Li-rich (>6 Li⁺ per formula unit) oxide argyrodite Li₇SiO₅Cl that crystallizes with an ordered cubic (P2₁3) structure at room temperature, undergoing a transition at 473 K to a Li⁺ site disordered F4̅3m structure, consistent with the symmetry adopted by superionic sulfide argyrodites. Four different Li⁺ sites are occupied in Li₇SiO₅Cl (T5, T5a, T3,

SUBMITTER: Morscher A 

PROVIDER: S-EPMC9732874 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature