In this study, mechanical and electrochemical properties of ionic conductive oxide glasses have been measured. The fracture toughness, crack resistance, hardness, and elastic moduli of Li-rich oxide glasses were characterized. Glasses become softer, less resistant to crack-initiation and -growth, as the lithium content is increased. In parallel, their ionic conductivity and activation energy show that the ionic diffusion of lithium is easier in the Li-rich compositions. Following our previous study [1], the measurement of the ionic conductivity under a compressive load aligned with the electric field demonstrated the existence of a mechano-electrical coupling. The change of the activation energy with the stress is associated with an activation volume that increases with the lithium content.

Keywords: Glass, Electrolyte, All-Solid-State Battery, Mechanics, Electrochemistry

[1] T. To et al., “Mechanical and Electrochemical Properties of Lithium Aluminoborate Glasses,” Glass Europe, vol. 2, pp. 27–44, Jul. 2024, doi: 10.52825/glass-europe.v2i.1382.