Correlation between structural and electrical properties of heavily lithiated boron oxide solid electrolytes

Infrared and impedance measurements have been carried out on high lithium content boron oxide solid electrolytes xLi2O–B2O3, with x = 3.0–4.5, in order to establish the correlation between their structural and electrical properties. The samples are two-phase materials, in which crystalline islands are scattered throughout the vitreous background phase. The evolution of structural and electrical properties with increasing x exhibits a marked differentiation around x = 4.0, which is associated with increasing crystallization in the material.