Electrolyte capacitors having a polymeric outer layer and process for their production

Process for the production of an electrolyte capacitor, in which, on to a capacitor body at least comprising

• a porous electrode body of an electrode material,
• a dielectric, which covers the surface of this electrode material,
• a solid electrolyte at least comprising an electrically conductive material which completely or partly covers the dielectric surface,
• is applied a dispersion a) which at least comprises
• particles b) of an electrically conductive polymer which comprise at least one optionally substituted polyaniline and/or one polythiophene having recurring units of the general formula (I) or of the formula (II) or recurring units of the general formulae (I) and (II)
• wherein
• A represents an optionally substituted C1-C5-alkylene radical,
• R represents a linear or branched, optionally substituted C1-C18-alkyl radical, an optionally substituted C5-C12-cycloalkyl radical, an optionally substituted C6-C14-aryl radical, an optionally substituted C7-C18-aralkyl radical, an optionally substituted C1-C4-hydroxyalkyl radical or a hydroxyl radical,
• x represents an integer from 0 to 8 and
• in the case where several radicals R are bonded to A, these can be identical or different,
• and a binder c) and a dispersing agent d),
• and, for formation of an electrically conductive polymeric outer layer, the dispersing agent d) is at least partly removed and/or the binder c) is cured,
• wherein the particles b) of the conductive polymer in the dispersion a) have an average diameter of 70-500 nm.