Original Paper

Journal of Solid State Electrochemistry

, Volume 10, Issue 9, pp 708-713

First online:

Formation and characterization of PEDOT-modified Nafion 117 membranes

  • L. LiAffiliated withKarl-Winnacker-Institut, DECHEMA e.V. Email author 
  • , J.-F. DrilletAffiliated withKarl-Winnacker-Institut, DECHEMA e.V.
  • , R. DittmeyerAffiliated withKarl-Winnacker-Institut, DECHEMA e.V.
  • , K. JüttnerAffiliated withKarl-Winnacker-Institut, DECHEMA e.V.

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Abstract

Nafion 117 membranes were modified with a thin film of poly(3,4-ethylenedioxythiophene) (PEDOT) by a diffusion-controlled polymerization process using a two-compartment cell with the monomer EDOT on one side of the membrane and the oxidizing agent FeCl3 on the other side. The methanol permeability and ion conductivity of the composite PEDOT/Nafion membranes were measured as a function of temperature and polymerization time by DC and AC polarization measurements in four-electrode technique and permeation experiments in a diaphragm cell. These modified membranes have lower methanol permeability while maintaining adequate conductivity.

Keywords

Direct methanol fuel cell Poly(3, 4-ethylenedioxythiophene) Methanol permeability