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Journal Articles The Journal of physical chemistry Year : 1994

Ac Impedance Study of Transport Processes in Polyaniline Membranes

Abstract

Polyaniline (PANI) membranes symmetrically bathed by electrolyte solutions on both faces have been studied by ac impedance. The membrane impedance is very sensitive to both solution pH and membrane potential, being lower under the conditions for which PANI is an electronic conductor: it increases by several orders of magnitude when pH is increased from 0 to 7 and less markedly upon membrane reduction. In the doped state, the impedance diagrams of PANI membranes have the shape of a diffusion impedance. The experimental data are analyzed with reference to a published transmission-line model. The ionic diffusion coefficient values derived from this analysis are compared with those obtained by permeation experiments.

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Dates and versions

hal-04491828 , version 1 (06-03-2024)

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Claude Deslouis, Marco Musiani, Bernard Tribollet. Ac Impedance Study of Transport Processes in Polyaniline Membranes. The Journal of physical chemistry, 1994, 98 (11), pp.2936-2940. ⟨10.1021/j100062a033⟩. ⟨hal-04491828⟩
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