One-dimensional stringlike cooperative migration of lithium ions in an ultrafast ionic conductor

One-dimensional stringlike cooperative migration of lithium ions in an ultrafast ionic conductor

In the recently developed ultrafast Li-ion conductor, Li10GeP2S12, our ab initio and molecular dynamics simulations have revealed a unique Li ion transport mechanism. The Li ions are discovered to migrate in a highly correlated fashion, stemming from the large Coulombic interaction between the mobil...

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Bibliographic Details
Published in:Applied physics letters 2012-07, Vol.101 (3)
Main Authors: Xu, M., Ding, J., Ma, E.
Format: Article
Language:eng
Subjects:
Conductors (devices)
Electrolytes
Ion transport
Ionic conductivity
Lithium batteries
Lithium ions
Migration
Stemming
Online Access:Get full text
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Summary:In the recently developed ultrafast Li-ion conductor, Li10GeP2S12, our ab initio and molecular dynamics simulations have revealed a unique Li ion transport mechanism. The Li ions are discovered to migrate in a highly correlated fashion, stemming from the large Coulombic interaction between the mobile ions. The stringlike cooperative ionic motion is found to entail a rather low energy barrier, contributing to the unusually high ionic conductivity of this solid-state electrolyte. Such a collective migration mechanism may also be operative in other Li-ion battery electrolytes with high concentrations of mobile Li ions.
ISSN:0003-6951
1077-3118