Process for the preparation of a porous material layer covered with an electronically conductive polymer and the product obtained by this process

Process for the preparation of a porous material layer covered with an electronically conductive polymer by in situ polymerization of a precursor monomer of the electronically conductive polymer by means of an oxidizing agent, characterized in that it comprises the following stages:

• a) placing the porous material layer on an impermeable, flexible support sheet made from a material inert under the polymerization conditions of the precursor monomer,
• b) applying to the layer on the support sheet a polymerization solution comprising the precursor monomer, the oxidizing agent and a doping agent,
• c) winding the assembly formed by the support sheet and the thus treated layer in order to form a composite roll,
• d) introducing the composite roll into a container,
• e) filling the container with a polymerization solution comprising the precursor monomer, the oxidizing agent and the doping agent and
• f) maintaining the composite roll in the container filled with the polymerization solution for an adequate time to polymerize the precursor monomer and form on the layer a conductive polymer covering.