Model for the Conductivity of Ionic Liquids Based on an Infinite Dilution of Holes

Charge transport in an ambient-temperature ionic liquid is limited by the mobility of suitably sized voids into which ions can migrate (see figure). This allows conductivity data to be simply analyzed by using the Stokes–Einstein equation. The mechanism of charge transport is contrasted with that in high-temperature molten salts, which is different from that in low-temperature systems.