Size-Dependent Chemomechanical Failure of Sulfide Solid Electrolyte Particles during Electrochemical Reaction with Lithium.
Nano Lett
; 22(1): 411-418, 2022 Jan 12.
Article
in En
| MEDLINE
| ID: mdl-34941277
ABSTRACT
The very high ionic conductivity of Li10GeP2S12 (LGPS) solid electrolyte (SE) makes it a promising candidate SE for solid-state batteries in electrical vehicles. However, chemomechanical failure, whose mechanism remains unclear, has plagued its widespread applications. Here, we report in situ imaging lithiation-induced failure of LGPS SE. We revealed a strong size effect in the chemomechanical failure of LGPS particles namely, when the particle size is greater than 3 µm, fracture/pulverization occurred; when the particle size is between 1 and 3 µm, microcracks emerged; when the particle size is less than 1 µm, no chemomechanical failure was observed. This strong size effect is interpreted by the interplay between elastic energy storage and dissipation. Our finding has important implications for the design of high-performance LGPS SE, for example, by reducing the particle size to less than 1 µm the chemomechanical failure of LGPS SE can be mitigated.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Nano Lett
Year:
2022
Type:
Article