Complex impedance analysis of RbNO3 and RbNO3:Al2O3 dispersed solid electrolyte systems

Impedance and Photosensitivity Spectra of Nanocomposite Structures Based on Layered Semiconductor InSe and Ionic Salt RbNO3

“…The plots of complex impedance have a form of deformed semi‐circle with the center that does not lie on the axis of impedance real value Z′. Such the effect was observed earlier for nanocomposite materials InSe–RbNO 3 , RbNO 3 –Al 2 O 3 , CsNO 3 –Al 2 O 3 . It was attributed to distributed elements in the ionic materials, semiconductor, and electrode materials.…”

“…According to the model of cubic blocks, the conductivity of an ionic nanocomposite is caused by both the electric charge formed on the surface of nanosize grains after their wetting by the melted ionic salt and bulk conductivity of the grains. A significant change of space‐charge regions at the interfaces between the ionic salt and oxide nanoparticles usually is reflected in the impedance spectra of ionic nanocomposites …”

“…So, in the bulk of the nanocomposite there is a high amount of the ring‐shaped ionic structures, nanocapacitors located in the (0001) InSe planes, which create parallel‐connected vertical channels for charge transport between the contacts and contribute to the total electric capacitance of the crystal. A high ionic conductivity of such the nanocomposites is related to a high density of defects at the interface between the oxide and ionic salt, where ionic transport takes place . In 2 O 3 has an n‐type conductivity and is characterized by high mobility of charge carriers (≈160 cm 2 V −1 s −1 ) and by transparency in the visible spectral range.…”

“…However, photoconductivity mechanisms of ionotronic structures are practically not investigated. An effective method to investigate the photoconductivity of heterophase materials is that of impedance spectroscopy that was also used in a study of ionic conductivity of ionic nanocomposites . In this work, we investigate the influence of optical radiation on the electric impedance of the nanocomposite ionotronic structures created on the basis of the layered semiconductor InSe and ionic salt RbNO 3 and photosensitivity spectral distribution of these structures.…”

Dielectric Relaxation, Ionic Conduction and Complex Impedance Studies on NaNo3 Fast Ion Conductor

“…It can be seen from the Table 1 that n is less than one for temperatures below 543 K and greater than 1 for the temperature at and above 543 K. The latter category corresponds to long-range diffusion of ions [26][27] .The observed frequency vs. conductivity behavior is explained by using jump relaxation model [28][29], according to which an ion jumps from a site to its neighbouring vacant site at low frequencies where as dispersion region is characterized by the random hopping of mobile ions and the conductivity is correlated to the forward-backward hopping of the ions leading to the long-range diffusion of ions at high frequency end [30][31]. The increase in ac conductivity could be attributed to the lowering of the activation barrier at higher frequencies as compared to that at lower frequencies [32].…”