ELECTROCONDUCTIVE-POLYMER SOLUTION, CAPACITOR, AND PROCESS FOR PRODUCING CAPACITOR

摘要

[Problem] To provide: an electroconductive-polymer solution with which a capacitor having a high capacitance, a low ESR, and excellent long-term reliability can be formed without requiring the use of treating liquids for electroconductive-polymer layer formation which differ in makeup or without forming any inner electroconductive-polymer layer by a different means; the capacitor; and a process for producing the capacitor. [Solution] The present invention relates to: an electroconductive-polymer solution which comprises an electroconductive polymer and a solvent, wherein the electroconductive polymer comprises a π-conjugated electroconductive polymer, a polyanion with which the π-conjugated electroconductive polymer has been doped, and a compound formed by reacting an oxirane or oxetane group with an anion moiety of the polyanion which makes no contribution to the doping, the solution having a pH of 2.0-6.0; a capacitor which includes either the electroconductive-polymer solution or the compounds remaining after removal of the solvent from the solution; and a process for capacitor production which includes impregnating the capacitor with the electroconductive-polymer solution and removing the solvent therefrom.