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A computer simulation study of ionic conductivity in polymer electrolytes | | Aninda Jiban Bhattacharyya
; T.R.Middya
; S.Tarafdar
; | | Date: |
21 Oct 1997 | | Subject: | cond-mat | | Affiliation: | Condensed Matter Physics Research Center, Department of Physics, Jadavpur University, Calcutta, INDIA | | 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-NH$_{4}$I and PEO-NH$_{4}$SCN. The average jump distance estimated from our work is consistent with the reported bond lengths for such polymers. | | Source: | arXiv, cond-mat/9710214 | | Services: | Forum | Review | PDF | Favorites | |
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