Conductivity of alkaline metal perchlorates

Ionic conductivity of high-temperature phases of alkaline metal perchlorates is studied. It is found that the conductivity passes through a minimum with increasing radius of cation, and KClO₄ exhibits the lowest conductivity. This is explained by a decrease in the relative size of conduction channel, which hampers the cation transfer, and an increase in the relative free volume. The free-volume increase promotes the perchlorate anion reorientation and reduces the activation energy for ion transfer by the “paddle-wheel” mechanism; as a result, the conductivity increases.     

Ionic Conductivity of Composite Solid Electrolytes (C4H9)4NBF4–Al2O3

Russian Journal of Electrochemistry - Composite solid electrolytes (C4H9)4NBF4–Al2O3 are synthesized in a wide range of composition. Their thermal, structural, and conducting properties are...     

Electrochemical properties of composition solid electrolytes LiClO<Subscript>4</Subscript>-MgO

Composition solid electrolytes (1 ? x)LiClO₄-xMgO are synthesized and their physicochemical properties are studied. According to the data of differential scanning calorimetry, for sufficiently high oxide concentrations, all lithium perchlorate is present in the composite in the amorphous state. Impedance spectroscopic studies demonstrate that the conductivity of composites passes through a maximum at x = 0.8?0.9, reaching ～10^?2 S/cm at 200°C. Based on voltammetric characteristics, it is shown that the voltage of electrochemical decomposition of composites in vacuum does not exceed 3.5–4.0 V, decreasing to 1.8–2.0 V in humid atmosphere. The conductivity of studied composites in vacuum may apparently be attributed to lithium ions, and these solid electrolytes can be used in solid-state electrochemical lithium cells.