A computer simulation study of ionic conductivity in polymer electrolytes
Abstract
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 different phases. A random walk (RW) is used to calculate the conductivity through the Nernst-Einstein relation. Our walk algorithm takes into account the reorganisation of the different phases over time scales comparable to time scales for the conduction process. This is a characteristic feature of the polymer network. The qualitative nature of the variation of conductivity with salt concentration agrees with the experimental values for PEO-NHI and PEO-NHSCN. The average jump distance estimated from our work is consistent with the reported bond lengths for such polymers.
Cite
@article{arxiv.cond-mat/9710214,
title = {A computer simulation study of ionic conductivity in polymer electrolytes},
author = {Aninda Jiban Bhattacharyya and T. R. Middya and S. Tarafdar},
journal= {arXiv preprint arXiv:cond-mat/9710214},
year = {2007}
}
Comments
12 pages, LaTeX, 2 ps figures, Submitted to Jour. Appl. Phys