the invention concerns complex porous structures varying in thickness and the method used for making them electrically conductive by conductive polymer deposit . the conductive activation is obtained by depositing a conductive polymer , set on the whole developed surface of the structure through its entire thickness , by pre - treatment steps for oxidizing the structure , depositing a monomer , polymerizing oxidaton - doping of the monomer . the structures are of the type crosslinked foam , felt or woven fabric and are mass - treated by flowing treatment solutions within blocks , still unwound rolls . said structures , which can be metal - coated or not , are particularly designed to be used as electrodes for the electrolysis of effluent liquids , detecting and trapping organic or biological molecules , supporting electrodes for electrochemical generators , catalyst supports , filtering media , sound insulating materials , electromagnetic , nuclear , antistatic protecting structures , heat exchangers and others .