Haesik Yang and Juhyoun Kwak, "Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 3. Complex Charge Transport in PPy/PSS Films," J. Phys. Chem. B, 102 (11), 1982-1988 (1998.03.12.)
Abstract
For the first time, the complex charge transport mechanism
for polyprrole/poly(polystyrenesulfonate) (PPy/PSS) films in aqueous electrolyte
solutions has been revealed by employing the cyclic/step electrochemical quartz
crystal microbalance (EQCM) technique and the electrochemical/electrogravimetric
impedance technique. Especially from the impedance experiments. the relative
diffusion coefficient of charge transport has been obtained, and also the ion
transport behavior in the slow charge transport process has been revealed. In
PPy/PSS films. anion transport is considerable in the slow charge transport
process, while cation transport is dominant in the fast charge transport process,
It is shown that the presence of the slow charge transport processes is due
to a slow electron transport process, not a slow ion transport process.