Kinetics of polyacetylene electrodes

Furthermore, the fact that the scan exhibits two peaks suggests the presence in the basic polyacetylene structure of at least two (if not more) different structural sites for the doping process, as effectively confirmed by independent structural studies (Shacklette et al, 1985). Finally, the 

As schematically illustrated in Fig. 9.11, one may assume that the doping process of (9.10) proceeds via the following main steps  

Since perchlorate ions, and more generally the majority of anions used in common electrolyte systems, are known to move rapidly in liquid solutions, it is reasonable to assume that the rate determining step in controlling the kinetics of the overall process is the ion diffusion throughout the polymer fibrils. This conclusion has been experimentally confirmed. For example, the diffusion coefficient of electrolyte counterions in bulk polyacetylene has been determined (Will, 1985) to be seven orders of magnitude lower than in liquid electrolytes, namely about 10 cm s vs 10 cm s  

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