Abstract
The diffusion rates of five ferrocene derivatives dissolved in an amorphous, cross-linked poly(ethylene oxide) (PEO) polymer electrolyte are measured by an electrochemical technique which detects the rate of their transport to an oxidizing microdisk electrode. The diffusion coefficients in dilute ferrocene/polymer solutions at 65{degree}C vary from 3 {times} 10{sup {minus}7} to 2 {times} 10{sup {minus}8} cm{sup 2} s{sup {minus}1} depending on the size of the ferrocene derivative. The diffusion coefficients decrease with increasing ferrocene concentration, increasing LiClO{sub 4} electrolyte concentration, and decreasing temperature; values approaching 10{sup {minus}10} cm{sup 2} s{sup {minus}1} are encountered at room temperature.
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