Carbon papers with conductive polymer coatings for use in solid‐state supercapacitors

Conductive polymer‐coated carbon papers have been fabricated through polymerisation of pyrrole‐based monomers oxidised with various heteropolyacids. Smooth surfaces are obtained when multiple coatings are applied to the carbon surface and give good contact with the Nafion ® electrolyte. Cyclic voltammetry was used to study the electrodes and a.c. impedance and charge / discharge cycling was used to study membrane electrode assemblies (MEA). MEAs were fabricated using a hot‐press technique.