ELECTROLYTIC CAPACITOR

摘要

A conductive polymer layer of a electrolytic capacitor includes a conductive polymer and a polymer dopant. The polymer dopant includes; (A) a first unit originating from a first monomer having a polymerizable group and a sulfonate group; and (B) a second unit originating from a second monomer having a polymerizable group and a phosphorus-containing group. The phosphorus-containing group is represented by at least one of general formula (1); —P(═O)(OR1)(OR2), general formula (2); —PH(═O)(OR3), and general formula (3); —PH2(═O). In the general formulae (1) to (3), each of R1, R2 and R3 is independently a hydrogen atom, a hydrophilic group, a C1 to C3 alkyl group, or a cationic group.

主权项

1. An electrolytic capacitor comprising:
an anode body; a dielectric layer formed on the anode body; and a conductive polymer layer covering at least a part of the dielectric layer; wherein: the conductive polymer layer comprises a conductive polymer and a polymer dopant; the polymer dopant comprises: (A) a first unit originating from a first monomer having a polymerizable group and a sulfonate group; and (B) a second unit originating from a second monomer having a polymerizable group and a phosphorus-containing group; and the phosphorus-containing group is represented by at least one of following general formulae:
—P(═O)(OR1)(OR2),  general formula (1):—PH(═O)(OR3), and  general formula (2):—PH2(═O),  general formula (3):in the general formulae (1) to (3), each of R1, R2 and R3 is independently a hydrogen atom, a hydrophilic group, a C1 to C3 alkyl group, or a cationic group.