  Hybrid ionic-electronic conductors have the potential to generate memory
effects and neuronal behavior. The functionality of these mixed materials
depends on ion motion through thin polarizable channels. Here, we explore
different polarization models to show that the current and conductivity of
electrolytes is higher when confined by conductors than by dielectrics. We find
non-linear currents in both dielectrics and conductors, and we recover the
known linear (Ohmic) result only in the two-dimensional limit between
conductors. We show that the polarization charge location impacts electrolyte
structure and transport properties. This work suggests a mechanism to induce
memristor hysteresis loops using conductor-dielectric switchable materials.
