Resistor-Network Modeling of Ionic Conduction in Polymer Electrolytes

Understanding Ionic Conductivity in Crystalline Polymer Electrolytes

A Computer Simulation Study of Ionic Conductivity in Polymer Electrolytes

In this paper we present a computer simulation study of ionic conductivity in solid polymeric electrolytes. The multiphase nature of the material is taken into account. The polymer is represented by a regular lattice whose sites represent either crystalline or amorphous regions with the charge carrier performing a random walk. Different waiting times are assigned to sites corresponding to the d...

Ionic transport and pair formation in polymer electrolytes

Common analysis (level 1) characterizes the degree of ion association in polymer electrolytes by the Nernst-Einstein deviation parameter ∆ which quantifies the relative difference between the true ionic conductivity directly measured by electrical methods and the hypothetical maximum conductivity calculated from the individual ionic self-diffusion coefficients. Alternatively, the Haven ratio HR...

Nanostructure enhanced ionic transport in fullerene reinforced solid polymer electrolytes.

Solid polymer electrolytes, such as polyethylene oxide (PEO) based systems, have the potential to replace liquid electrolytes in secondary lithium batteries with flexible, safe, and mechanically robust designs. Previously reported PEO nanocomposite electrolytes routinely use metal oxide nanoparticles that are often 5-10 nm in diameter or larger. The mechanism of those oxide particle-based polym...

Percolation and conduction in a random resistor-diode network

We study percolation and conduction in a randomly diluted network in which the occupied bonds may be either resistor-like, transmitting connectivity in both directions along a bond, or diode-like, transmitting in only one direction. This system exhibits novel phase transitions signalling the onset of infinite clusters with either isotropic or unidirectional connectivity. Position-space renormal...