Effects of Sublattice Symmetry and Frustration on Ionic Transport in Garnet Solid Electrolytes.
Phys Rev Lett
; 116(5): 055901, 2016 Feb 05.
Article
in En
| MEDLINE
| ID: mdl-26894719
ABSTRACT
We use rigorous group-theoretic techniques and molecular dynamics to investigate the connection between structural symmetry and ionic conductivity in the garnet family of solid Li-ion electrolytes. We identify new ordered phases and order-disorder phase transitions that are relevant for conductivity optimization. Ionic transport in this materials family is controlled by the frustration of the Li sublattice caused by incommensurability with the host structure at noninteger Li concentrations, while ordered phases explain regions of sharply lower conductivity. Disorder is therefore predicted to be optimal for ionic transport in this and other conductor families with strong Li interaction.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2016
Type:
Article
Affiliation country:
United States