Abstract
Ionic conductivity and dielectric properties such as dielectric permittivity and loss tangent for the samples of lithium and sodium borophosphate glasses were investigated using the electrical conductivity measurements in the range of frequency from 10 Hz to 2 MHz and various temperatures below Tg. The measured data of ac conductivity were described according Jonscher's power law and experimental values of imaginary part of electric modulus were fitted by KWW function. From the fitted parameters, the activation energies for conduction and relaxation time were found which characterize the hopping processes and transport mechanism in these ion conducting glasses.
Highlights
Borophosphate glasses may find potential use in different technological applications
The developing of the stable interface is the biggest issue for the solid state electrolyte materials
The choise of this system is often used for theoretical interest as a model sample for studies of the mixed glass former effect (MGF)
Summary
Borophosphate glasses may find potential use in different technological applications. The developing of the stable interface is the biggest issue for the solid state electrolyte materials These glasses have shown to be promising candidates for improved electrolytes of Li-ion batteries due to their physical properties than high ionic conductivity at room temperature (about 10-7 S/cm), chemical stability and compatibility with the electrode materials [4 - 6]. From the review of literature we can see several spectroscopy studies such as Raman spectroscopy, X-ray photoelectron spectroscopy or Nuclear Magnetic Resonance which are focused on the relationship between the structural changes and physical properties in alkali borophosphate glasses [6, 8, 9] The choise of this system is often used for theoretical interest as a model sample for studies of the mixed glass former effect (MGF).
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