NOVELTY - Production of a metallized graphite felt element (MGFE) coated with a conductive polymer involves electro-polymerization of a monomer, present as 0.001-1 M solution in supporting electrolyte-containing organic solvent, using a working electrode consisting of the MGFE between supports. Polymerization is effected in successive cycles, each of a current application phase at 100-500 mA for 15-30 seconds and a rest phase of 1-2 minutes.    USE - The use of the obtained conductive polymer-coated metallized graphite felt element (MGFE) obtained by the process is claimed (i) as a reversible electrode for an accumulator and (ii) where a catalyst for electrochemical reduction of molecular oxygen is fixed to the polymer, as a positive electrode for metal-hydride type accumulators or an electrode for an oxygen-hydrogen type fuel cell. The accumulator or fuel cell electrodes (ii) containing the product of the process are independently claimed. More generally the products are porous metallized materials of high specific surface for use in a wide range of industries, e.g. in the accumulator, electromagnetic screening, filter, catalysis and decoration sectors.    ADVANTAGE - A homogeneous conductive polymer coating film of constant thickness is obtained using a rapid and effective procedure.    DETAILED DESCRIPTION - Production of a metallized graphite felt element (MGFE), homogeneously coated throughout its volume with a conductive organic polymer, involves: (a) introducing 0.001-1 (preferably 0.05-0.1) M solution of monomer (I) in supporting electrolyte-containing organic solvent into electropolymerization apparatus with counter-electrode(s) and working electrode(s) consisting of the MGFE between supports each having a cavity allowing (I) to pass through the MGFE, at least one of the supports carrying an electrical conductor; and (b) carrying out electropolymerization of (I) onto the MGFE in successive cycles, each consisting of a phase of applying a current of 100-500 mA for 15-30 seconds and a rest phase of 1-2 minutes.