Dielectric studies of silver doped lithium tellurite borate glasses for fast ionic battery applications

To study the effect of Ag2O on the dielectric properties of the glass system with chemical composition xAg2O-(30-x)TeO2−20Li2O-50B2O3(x= 0,0.5,1.0,1.5 and 2.0mole%) was synthesized by melt quench technique. X-ray diffraction studies on the glass system revealed the amorphous nature. Frequency dependent AC conductivity measurements were implied on the prepared glass system in the high frequency range 5Hz-35MHz. AC conductivity measurements was recorded from room temperature to 350°C for all the samples. Presence of two ionic network modifiers such as Ag2O and Li2O plays significant role in the electrical transport properties like real dielectric permittivity(ɛ/) and loss tangent (tan δ). Addition of Ag2O causes breaking of base glass former B2O3 structural units with the creation of non-bridging oxygens (NBOs) in the glass network. Dielectric properties of the glass system show inconsistency in the results from room temperature to 100°C due to non-uniform charge carrier moments up to certain temperatures. Tangent loss and dielectric permittivity (ɛ/) decreased with increase of frequency and getting saturation at higher frequencies.