Abstract
The characteristics of n- and p-doping of polyacetylene in different solvents were investigated by potentiostatic and galvanostatic charge/discharge curves, the fast Fourier transform impedance method and the galvanostatic pulse technique. The intercalated ions were Li +, Na +, ClO 4 − and BF 4 −. From the impedance measurements a rapid determination of electrochemical parameters like double-layer capacitance, electrolyte resistance and polarization resistance at different states of charge and discharge were obtained. Similarly, electrode kinetics and diffusion behaviour were determined by the galvanostatic pulse technique. The doping characteristics were additionally monitored by in situ resonance Raman scattering experiments. We found strong evidence for solvent coinsertion during the doping process. Ion diffusion is rate controlling to a much higher degree for undoping compared to n-doping.
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