Reaction accelerator for conductive polymer synthesis, conductive polymer and solid electrolytic capacitor

Abstract

There is provided a reaction accelerator for polymerizing a conductive polymer, comprising: a salt of an anion derived from a sulfonic acid having a skeleton of benzene or naphthalene having at least one OH group, and at least one divalent or more cation other than a transition metal cation. There is also provided a conductive polymer including the salt concerning the reaction accelerator. There is also provided a solid electrolyte capacitor including the conductive polymer as a solid electrolyte. The conductive polymer has a high electric conductivity and good heat-resistance. The solid electrolyte capacitor is reliable for an extended period of time.

1 . A reaction accelerator for polymerizing conductive polymer, comprising: a salt of an anion derived from a sulfonic acid having a skeleton of benzene or naphthalene having at least one OH group, and at least one divalent or more cation other than a transition metal cation. 
   
   
       2 . A reaction accelerator for polymerizing conductive polymer according to  claim 1 , wherein the salt is in an aqueous solution. 
   
   
       3 . A reaction accelerator for polymerizing conductive polymer according to  claim 1 , wherein the reaction accelerator in an aqueous solution having a concentration of 5 mass % has a pH of 1 or more. 
   
   
       4 . A reaction accelerator for polymerizing conductive polymer according to  claim 1 , wherein the salt is one from phenol sulfonic acid or cresol sulfonic acid. 
   
   
       5 . A reaction accelerator for polymerizing conductive polymer according to  claim 1 , wherein said divalent or more cation is selected from the group consisting of calcium ion, strontium ion, barium ion, aluminum ion and ethylenediamine ion. 
   
   
       6 . A conductive polymer having a matrix including a salt of an anion derived from a sulfonic acid having a skeleton of benzene or naphthalene having at least one OH group, and at least one divalent or more cation other than a transition metal cation. 
   
   
       7 . A conductive polymer according to  claim 6 , wherein the matrix of the conductive polymer is a polymer of at least one monomer selected from the group consisting of thiophene, pyrrole, aniline and derivatives thereof. 
   
   
       8 . A conductive polymer according to  claim 6 , wherein the salt is one from phenol sulfonic acid or cresol sulfonic acid. 
   
   
       9 . A conductive polymer according to  claim 6 , wherein said divalent or more cation is selected from the group consisting of calcium ion, strontium ion, barium ion, aluminum ion and ethylenediamine ion. 
   
   
       10 . A conductive polymer according to  claim 6 , wherein said divalent or more cation is included at a concentration of 10 to 1000 ppm. 
   
   
       11 . A conductive polymer according to  claim 6 , wherein the conductive polymer is obtained by chemical oxidation polymerization of a monomer by using a persulfate salt and the reaction accelerator for polymerizing conductive polymer. 
   
   
       12 . A conductive polymer according to  claim 6 , wherein the conductive polymer is obtained by chemical oxidation polymerization of a monomer by using an oxidizer dopant solution and the reaction accelerator, wherein the oxidizer dopant solution comprises a mixture of a persulfate salt with an alkylamine salt or imidazole salt of an anion derived from a sulfonic acid having a skeleton of benzene or naphthalene having at least one OH group and at least one sulfonate group, and at least one divalent or more cation other than a transition metal cation. 
   
   
       13 . A solid electrolyte capacitor including a solid electrolyte of the conductive polymer according to  claim 6 .