Electrically-conductive polymer and production method thereof, and solid-electrolytic capacitor

A production method of an electrically-conductive polymer, comprising the steps of:

• preparing a solution containing an electrically-conductive monomer matrix, a multivalent proton acid selected from the group consisting of citric acid and salicylic acid, and an aromatic compound selected from the group consisting of p-toluensulfonic acid, p-ethylbenzenesulfonic acid, p-pentylbenzenesulfonic acid, p-octylbenzenesulfonic acid, p-decylbenzenesulfonic acid, p-dodecylbenzenesulfonic acid, 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, and butyl naphthalenesulfonic acid;
• and
• polymerizing said monomer by chemically oxidative polymerization in said solution, thereby producing an electrically-conductive polymer of said monomer;
• wherein said electrically-conductive polymer contains an electrically-conductive polymer matrix, said multivalent proton acid;
• and said aromatic compound;
• and wherein a cleavage reaction of a main chain of said electrically-conductive polymer matrix is suppressed.

A production method of an electrically-conductive polymer, comprising the steps of:

• preparing a solution containing an electrically-conductive monomer matrix, a multivalent proton acid selected from the group consisting of citric acid and salicylic acid, and an aromatic compound selected from the group consisting of p-toluensulfonic acid, p-ethylbenzenesulfonic acid, p-pentylbenzenesulfonic acid, p-octylbenzenesulfonic acid, p-decylbenzenesulfonic acid, p-dodecylbenzenesulfonic acid, 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, and butyl naphthalenesulfonic acid;
• and
• polymerizing said monomer by electrolytically oxidative polymerization in said solution, thereby producing an electrically-conductive polymer of said monomer;
• wherein said electrically-conductive polymer contains an electrically-conductive polymer matrix, said multivalent proton acid;
• and said aromatic compound;
• and wherein a cleavage reaction of a main chain of said electrically-conductive polymer matrix is suppressed.

A solid-electrolyte capacitor comprising:

• a capacitor element having an anode body;
• a dielectric film made of anodic-oxide formed on said body;
• and
• an electrically conductive polymer film serving as a solid electrolyte formed on said dielectric film;
• wherein said electrically-conductive polymer contains an electrically-conductive polymer matrix, a multivalent protonic acid selected from the group consisting of citric acid and salicylic acid;
• and an aromatic compound selected from the group consisting of p-toluensulfonic acid, p-ethylbenzenesulfonic acid, p-pentylbenzenesulfonic acid, p-octylbenzenesulfonic acid, p-decylbenzenesulfonic acid, p-dodecylbenzenesulfonic acid, 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, and butyl naphthalenesulfonic acid;
• and wherein a cleavage reaction of a main chain of said electrically-conductive polymer matrix is suppressed.