POLYMER ELECTROLYTES - THE IMPORTANCE OF ION-ION INTERACTIONS IN-DIFFUSION DOMINATED BEHAVIOR

Monte Carlo simulations combined with analytic results based on the dy namically disordered hopping model are used to show that even in the p resence of ion-ion interactions, the conductivity of polymer electroly tes is diffusion dominated. Coulomb interactions between charge carrie rs do result in some collective correlations that affect the conductiv ity, as evidenced by deviations from the Nernst-Einstein equation, but the action of these interactions on the diffusivity overshadows these effects. Furthermore, these results show that renewal limited behavio r (the diffusion coefficient depends linearly on the host's renewal ra te) can persist even in the presence of these interactions. These stud ies help resolve the role ion-ion interactions play in renewal dominat ed behavior.