Electrolytic capacitors having polythiophene with alkylenoxythiathiopen units

摘要

Polythiophenes with 3,4-alkyleneoxythiathiophene units and optionally 3,4-alkylenedioxythiophene units are used in solid electrolytes for electrolytic condensers. Electrolytic condensers containing (A) a layer of oxidizable metal, (B) an oxide layer based on this metal, (C) a solid electrolyte and (D) contacts, in which the electrolyte (C) contains polythiophenes with repeating units of formula (I) or (I) and (II), [Image] A : optionally substituted 1-5C alkylene; R : 1-18C alkyl, 5-12C cycloalkyl, 6-14C aryl, 7-18C aralkyl or 1-4C hydroxyalkyl (all optionally substituted), or hydroxyl; x : 0-8 . Independent claims are also included for (1) a method (M1) for the production of such condensers by depositing the thiophene(s) (III)/(IV) corresponding to (I) and/or (II) onto an oxide layer (B) together with an oxidizing agent and optionally counter-ions, and polymerizing the compounds by chemical oxidation at -10 to 250[deg]C to give the polythiophene, or by electrochemical oxidation at -78 to 250[deg]C (without oxidizing agent) (2) electrically conductive layers containing polythiophenes as defined above (3) a method for the production of electrically conductive layers by chemical oxidation of (III)/(IV) on a substrate as described above (4) dispersions containing cationic polythiophenes with units (I) and/or (II), plus polymeric anions as counter-ions and one or more solvents (5) a method for the production of such dispersions by the oxidative polymerisation of (III)/(IV) in presence of oxidizing agent(s), solvent(s) and polymeric anions or the corresponding polymeric acids (6) neutral or cationic polythiophenes containing 1-100 mol% units (I) and 99-0 mol% (II), with polymeric anions as counter-ions in the case of cationic polythiophenes.