JP2012153867A - Conductive composition as well as production method therefor, and capacitor prepared using the conductive composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a conductive composition obtained by chemical polymerization as well as a production method therefor, and an antistatic material as well as an electrolytic capacitor prepared using the conductive composition; and to provide a conductive composition having high electric conductivity and excellent adhesion to a substrate and a production method therefor, and an antistatic material having excellent adhesion to the substrate each prepared using the conductive composition; as well as a solid electrolytic capacitor having excellent high frequency characteristics.SOLUTION: A polymerizable monomer is subjected to chemical oxidative polymerization in a polymerization medium in which poly-N-vinyl acetamide (PNVA) is present, to obtain an antistatic material which improves electric conductivity of a conductive composition obtained after evaporation of the polymer medium and has excellent adhesiveness because the PNVA acts as a binder. Further, when the conductive composition is used for a cathode conductive layer, a solid capacitor having excellent high frequency characteristics can be attained.

Description

  The present invention relates to a conductive composition comprising a conjugated double bond conductive polymer doped with anions and poly-N-vinylacetamide (PNVA), and a method for producing the same. The present invention also relates to a capacitor using the conductive composition.

In general, a conjugated double bond conductive polymer represented by polyaniline, polypyrrole or polythiophene can be produced by chemical oxidative polymerization and electrolytic polymerization. When using electropolymerization, the conductive polymer is formed into a film on the electrode, making it difficult to manufacture in large quantities, whereas when using chemical oxidative polymerization, In principle, a large amount of conductive polymer can be obtained relatively easily by the reaction of a polymerizable monomer and an appropriate oxidizing agent. Chemically polymerized polyaniline, polypyrrole (PPy) and polyethylenedioxythiophene (PEDOT) are disclosed in, for example, Patent Documents 1, 2 and 3.
Capacitors using a conductive polymer for the cathode conductive layer are disclosed in, for example, Patent Document 4 and Patent Document 5. Patent Document 4 discloses a method of forming a conductive polymer layer by electrolytic polymerization. Patent Document 5 discloses a method of forming a conductive polymer layer by chemical oxidative polymerization using an oxidizing agent. Conductive polymer has a π-conjugated double bond, so it is rigid and insoluble in heat and solvent, so post-processing is difficult, and polymerization is performed in situ to form a conductive polymer layer. It was necessary to let them. The in-situ polymerization process is complicated, special technical know-how is required, and the production cost is high. Electrolytic capacitors using conductive polymers currently on the market can be broadly divided into those using electrolytic polymerization PPy, those using chemical polymerization PPy, and those using chemical polymerization PEDOT.

In the case of PEDOT obtained by polymerizing ethylenedioxythiophene (EDOT) in a polymerization medium using an oxidizing agent, the oxidation reaction does not occur at this site because the 3rd and 4th positions are blocked with a substituent. Thus, it is expected that a polymer conductive composition having extremely high environmental stability can be realized and is highly useful in terms of application.
Furthermore, the PEDOT containing the organic acid ions and inorganic acid ions of the anionic surfactant obtained in an aqueous medium system is obtained in a high yield while having a low concentration of the monomer EDOT, and has a high electrical conductivity. For example, it is disclosed in Patent Document 2.

  Further, by adding at least one of a sulfoxide solvent, a polyhydric alcohol, a polyol or a mixture thereof to an aqueous medium in which a conductive composition comprising PEDOT and polystyrene sulfonic acid (PSS) is dispersed, the conductive composition is added. For example, Patent Document 3 discloses that electrical conductivity is improved when a coating film is formed.

However, the conductive polymer obtained by chemical polymerization is insoluble and exists in a dispersed state in the reaction medium. Therefore, for example, it is difficult to obtain a dense film-like film by a casting method or the like.
Therefore, a film-like conductive composition thin film is obtained by adding and mixing a binder resin or the like that dissolves in the reaction medium after polymerization. This method is disclosed in Patent Document 6 and Patent Document 7, for example.

JP-A-6-200017 JP 9-268258 A Japanese Patent Laid-Open No. 7-90060 JP-A-1-310529 Japanese Patent Laid-Open No. 9-74050 JP 2010-6079 A JP 2007-324124 A

  By conducting chemical polymerization in the presence of PSS, PEDOT doped with PSS (abbreviated as PEDOT / PSS) that is not recovered as a solid but dispersed in an aqueous medium in a colloidal form at a very dilute concentration of about 1% by weight. ) Can be produced. By evaporating the liquid from the PEDOT / PSS dispersion, a conductive polymer layer made of PEDOT / PSS can be easily obtained. However, this layer has a form in which fine powders are aggregated, and there is a problem that adhesion strength between the substrate and the PEDOT / PSS particles is low, and it is easy to peel off from the substrate.

In order to solve this problem, an attempt has been made to add a polymer that dissolves in a liquid in which PEDOT / PSS is dispersed as a binder and to improve the adhesion strength to the substrate by the binder. The binder only needs to be soluble in the dispersion medium. For example, when water is the dispersion medium, polyvinyl pyrrolidone or polyvinyl alcohol is preferably used. When the dispersion medium is an organic solvent, a polymer soluble in the organic solvent can be used as the binder. Examples of the binder polymer soluble in the organic solvent include polymethyl methacrylate, polystyrene, and polyvinyl chloride. These binders are properly used depending on the dispersion medium used and the adherend.
However, when these binders are added to form a conductive layer containing PEDOT / PSS, the adhesion strength of the film is improved, but the electrical conductivity often decreases because it is diluted with an insulator. Newly occurs.

  Up to this point, only the case where PEDOT / PSS is used as the conductive polymer has been described. However, for example, even when a dispersed type PEDOT containing other dopants such as a surface active anion and sulfate ion is used, a binder resin is used. For example, the same problem as in the case of PEDOT / PSS occurs. This problem similarly occurs in a dispersion medium containing PPy doped with anions.

The present invention solves the above-mentioned problems of the prior art, and provides a conductive composition containing a conjugated double bond conductive polymer doped with an anion and poly-N-vinylacetonitrile (PNVA), and a method for producing the same. It is intended to do.
PNVA is available from Showa Denko Co., Ltd. in different grades with different average molecular weights and can be easily obtained.
Since PNVA is amphiphilic and dissolves in water and other organic media such as alcohol, glycol, dimethyl sulfoxide, etc., it is not necessary to consider the use of a binder depending on the dispersion medium. Moreover, since the dispersibility of the polymerizable monomer is improved, a conductive polymer having a fine powder dispersion stability is obtained. In addition, when PNVA is used as a binder, the percolation threshold of the conductive polymer fine particles becomes small, and high conductivity is obtained even in the case of a low concentration conductive polymer. In addition, since PNVA is excellent in adhesion, a conductive composition layer having high adhesion strength can be formed.
The present invention also provides an antistatic material using a conductive composition containing PNVA. This antistatic material easily realizes an antistatic material having high adhesion and high conductivity by volatilizing the dispersion medium.
The present invention also provides a solid electrolytic capacitor using a conductive composition containing PNVA as a cathode conductive layer. The conductive composition can easily form a cathode conductive layer by coating, and since the conductive composition has high conductivity, a solid electrolytic capacitor having excellent high-frequency characteristics can be realized. Since a complicated process called an in-situ polymerization process can be omitted, production is easy and the cost is greatly reduced.
A metal having a valve action such as aluminum, tantalum, niobium, titanium, or the like can be used as the capacitor anode.

  The invention described in claim 1 of the present invention is a conductive composition comprising a conjugated double bond conductive polymer doped with an anion and poly-N-vinylacetonitrile (PNVA).

  As shown in claim 2, a conjugated double bond conductive polymer having a pyrrole or thiophene ring as a repeating unit can be used.

  As described in claim 3, the conjugated double bond conductive polymer may contain 3,4-ethylenedioxythiophene (EDOT) or pyrrole (Py) as a repeating unit.

  The conductive composition comprising a conjugated double bond conductive polymer doped with an anion and poly-N-vinylacetonitrile (PNVA) according to claim 4, wherein the conductive composition is dispersed in a liquid medium. It's okay. In this case, a conductive layer made of a conductive composition can be obtained by volatilizing the dispersion medium.

  As the dispersion medium, a medium containing at least water as described in claim 5 can be used.

  The present invention also provides a polymerizable monomer that forms PNVA and a conjugated double bond conductive polymer and an oxidizing agent for polymerizing the polymerizable monomer in a liquid medium, as described in claim 6, And a method for producing a conductive composition obtained by polymerizing the polymerizable monomer with an oxidizing agent.

  As described in claim 7, in the production method of the present invention, a conjugated double bond conductive polymer containing a pyrrole or thiophene ring as a repeating unit can be used.

  The conjugated double bond conductive polymer as described in claim 8 preferably contains 3,4-ethylenedioxythiophene (EDOT) or pyrrole (PPy) as a repeating unit.

  As described in claim 9, a liquid medium containing at least water is preferably used.

  As described in claim 10, it is preferable that at least one selected from transition metal salts or persulfates is included as an oxidizing agent.

  As described in claim 11, the conductive composition layer according to the present invention can be suitably used as an antistatic material, especially an antistatic coating.

  As described in claim 12, by using the conductive composition according to the present invention for the cathode conductive layer, a solid electrolytic capacitor having an excellent high frequency characteristic can be obtained.

The conductive composition of the present invention comprises a conjugated double bond conductive polymer containing an anion and PNVA, and is dispersed in a liquid medium. By removing the dispersion medium from this system, a highly conductive thin-film conductive layer can be easily obtained.
This is thought to be due to the low threshold for percolation formation of conjugated double bond conductive polymers in PNVA.

  In addition, since a polymerizable monomer is polymerized using an oxidizing agent in the presence of PNVA dissolved in a medium, a conjugated double bond conductive polymer in fine powder can be obtained by the interaction between PNVA and the polymerizable monomer. In a stable dispersion state.

  In addition, since the conductive composition of the present invention can be easily formed into a thin film by removing the medium, it can be used as an antistatic coating, particularly as an antistatic agent.

  Furthermore, the conductive composition of the present invention can be used for the cathode conductive layer of an electrolytic capacitor. When the conductive composition of the present invention is used, in-situ polymerization, which has been the main method for forming a cathode conductive layer in the past, is no longer required, the process can be simplified, and a great industrial contribution can be expected.

  The conjugated double bond conductive polymer constituting the conductive composition of the present invention is not particularly limited as long as it contains an optionally substituted pyrrole ring or thiophene ring as a repeating unit. Those having ethylenedioxythiophene as a repeating unit are preferred.

  The top view which shows the anode of the capacitor of Embodiment 4 of this invention.   Sectional drawing which shows the schematic structure of the capacitor of Embodiment 4 of this invention.   The relationship figure of the frequency and impedance of the capacitor of Embodiment 4 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
First, a first embodiment of the present invention will be described. First, in this Embodiment, 10g of PNVA (GE191-000 by Showa Denko) was melt | dissolved in the pure water 1000g used as a reaction medium. Next, 9 g of iron (III) sulfate n-hydrate and 6.8 g of potassium persulfate as the oxidizing agent, 7.1 g of EDOT as the polymerizable monomer, and polystyrenesulfonic acid (17% aqueous solution manufactured by Akzo Nobel) as the dopant ( 29 g each of PSS) was added. Thereafter, polymerization was carried out with stirring at 45 ° C. and atmospheric pressure for 48 hours. Since the whole liquid was colored light black, it was confirmed that PEDOT doped with PSS was formed and dispersed in water. Here, although what was marketed from HC Starck was used for EDOT, you may synthesize | combine EDOT with a general preparation method.

ヤイオンＳＫ１１０：三菱化学製）を用いてイオン交換処理を行った。さらに

Ａ：三菱化学製））を用いてイオン交換処理を行った。Next, in order to disperse the secondary agglomerated conductive polymer, treatment was performed using a homogenizer, followed by filtration using filter paper having an opening of 1 μm. The remaining iron in the filtrate

Ion exchange treatment was performed using Yaion SK110 (manufactured by Mitsubishi Chemical). further

A: manufactured by Mitsubishi Chemical Corporation)).

  When this liquid was applied to a slide glass and dried at 110 ° C. for 1 hour, a strongly conductive film-like conductive composition layer was formed. When the electrical conductivity of this film was measured by the 4-terminal method, 1.4 S / cm was obtained.

(Comparative Example 1)
For comparison, a PEDOT dispersion was obtained as Comparative Example 1 in the same manner as in Example 1 except that PNVA was not added. After coating on a slide glass and drying at 110 ° C. for 1 hour, a film-like continuous layer was not formed, and it was easily peeled into a powder form. A pressed pellet having a diameter of 13 mm was produced from this powder, and the electrical conductivity was measured by a four-terminal method, which was 1.5 S / cm.

  From the comparison between Embodiment 1 and Comparative Example 1, it became clear that a film-like conductive layer firmly adhered to the substrate was easily obtained by addition of PNVA and there was almost no decrease in electrical conductivity. Presumably, the dispersibility of PEDOT doped with PPS is improved by the interaction with PNVA coexisting in the reaction system, and percolation is formed in PNVA, and high conductivity is maintained.

(Comparative Example 2)
Further, as Comparative Example 2 for comparison, in the same manner as in Embodiment 1 except that polyvinyl alcohol (Aldrich) (PVA) having a weight average molecular weight of 85000 to 124000 and a saponification degree of 98 to 99% was added instead of PNVA. A PEDOT dispersion liquid doped with PSS was prepared. When applied to a slide glass and dried at 110 ° C., a film-like conductive layer adhered firmly to the glass substrate was obtained.

  When the electric conductivity was measured in the same manner as in the first embodiment, 0.5 S / cm was obtained. Although PVA has a smaller interaction with PEDOT during the reaction process, and PNVA has a lower threshold for percolation of conductive fine particles than PVA, it contains the same proportion of insulating polymer, It is considered that the electrically conductive composition of the present invention provides higher electrical conductivity.

(Comparative Example 3)
For comparison, as Comparative Example 3, PEDOT doped with PSS in the same manner as in Embodiment 1 except that polyvinylpyrrolidone (manufactured by Tokyo Chemical Industry) (PVP) having a weight average molecular weight of 630000 was added instead of PNVA. A dispersion was prepared. When applied to a slide glass and dried at 110 ° C., a film-like conductive layer that was firmly adhered was obtained.

When the electric conductivity was measured in the same manner as in the first embodiment, 0.4 S / cm was obtained. Although PVP has less interaction with PEDOT during the reaction process, and PNVA has a lower threshold for percolation of conductive fine particles than PVP, it contains the same proportion of insulating polymer, It is considered that the electrically conductive composition of the present invention provides higher electrical conductivity.

  As described above, from the comparison between Embodiment 1 and Comparative Examples (1) to (3), the addition of PNVA has an excellent adhesion strength without causing a significant decrease in the electrical conductivity of PEDOT. It was revealed that a conductive film having the following can be obtained.

  The conductive composition according to the present invention can be easily formed into a thin film, has high electrical conductivity, and is excellent in adhesion to a substrate, so that it is extremely useful as an antistatic material.

(Embodiment 2)
A dispersion composed of PEDOT doped with PSS and PNVA was obtained in the same manner as in Example 1 except that 15 g of PNVA was used instead of 10 g of PNVA. The same treatment as in Embodiment 1 was performed from this dispersion, a film was formed in the same manner as in Embodiment 1, and the electrical conductivity was measured. As a result, 1.3 S / cm was obtained. Although the ratio of PNVA is larger than that in the first embodiment, almost the same electric conductivity was observed. This indicates that the percolation threshold of the conductive polymer particles in PNVA is low.

  Although the ratio of PNVA to the conductive polymer can be further increased, the molecular weight of PNVA used in Embodiment 1 is large and the viscosity of the dispersion liquid is increased. PNVA having a lower molecular weight is also on the market, and if a lower molecular weight PNVA is used, a higher concentration can be added while suppressing the viscosity of the system. Accordingly, the ratio of PEDOT in the conductive thin film is reduced, and the cost of the obtained conductive composition film can be reduced without causing a large decrease in electrical conductivity, thereby increasing the industrial value.

  It is known that the electric conductivity of PEDOT doped with PSS is increased about 100 times by adding a high boiling point solvent such as dimethyl sulfoxide (DMSO), and such a conductive composition has been put into practical use. Yes. Also in the case of the conductive composition according to the present invention, it was confirmed that the electrical conductivity increased by about two orders of magnitude by adding DMSO.

(Embodiment 3)
Embodiment 1 except that 0.35 g of pyrrole monomer (manufactured by Tokyo Chemical Industry Co., Ltd.) is used instead of EDOT, and 2 g of surfactant sodium alkylsulfonate (manufactured by Takemoto Yushi: 40% solution) (ANS) is further added and added. The same polymerization solution was prepared. When this solution was stirred at 5 ° C. for 4 hours, the entire system was colored black. This indicates that ANS is predominantly doped polypyrrole (PPy). Dispersion, filtration, and ion exchange treatment were performed on this liquid in the same manner as in the first embodiment.

  When the PPy dispersion obtained above was applied onto a glass substrate and dried at 110 ° C., a conductive composition film excellent in adhesion was obtained. When the electric conductivity was measured by the four-terminal method, 18 S / cm was obtained.

(Comparative Example 4)
For comparison, a PPy dispersion was obtained as Comparative Example 4 in the same manner as in Embodiment 2 except that PNVA was not added. After coating on a slide glass and drying at 110 ° C. for 1 hour, a film-like continuous layer was not formed, and it was easily peeled into a powder form. A pressure pellet having a diameter of 13 mm was produced from this powder, and the electrical conductivity was measured by a four-terminal method. As a result, it was 17 S / cm.

  Comparison between Embodiment 3 and Comparative Example 4 revealed that a film-like conductive layer that was firmly adhered to the substrate was easily obtained by addition of PNVA, and that there was almost no decrease in electrical conductivity. Probably ANS-doped PPy is percolated in PNVA.

(Comparative Example 5)
Further, as a comparative example 5 for comparison, in place of PNVA, PSS having a weight average molecular weight of 85000 to 124000 and a saponification degree of 98 to 99% was added in the same manner as in the embodiment 1, except that PVA was added. A prepared PEDOT dispersion was prepared. When applied to a slide glass and dried at 110 ° C., a film-like conductive layer that was firmly adhered was obtained.

  When the electric conductivity was measured in the same manner as in the first embodiment, 8.2 S / cm was obtained. The conductive composition of the present invention has higher electrical conductivity even though PNVA contains the same proportion of insulating polymer because the threshold of percolation formation of conductive fine particles is lower than that of PVA. It is clear that it is obtained.

(Comparative Example 6)
Further, as a comparative example 6 for comparison, PPy dispersion in which ANS was “doped” in the same manner as in the third embodiment except that polyvinylpyrrolidone (PVP: manufactured by Tokyo Chemical Industry Co., Ltd.) having a weight average molecular weight of 630000 was added instead of PNVA. A liquid was prepared. When applied to a slide glass and dried at 110 ° C., a film-like conductive layer that was firmly adhered was obtained.

  When the electrical conductivity was measured in the same manner as in the first embodiment, 7.9 S / cm was obtained. The conductive composition of the present invention has a higher electrical conductivity even though PNVA contains the same proportion of insulating polymer because the threshold of percolation formation of conductive fine particles is lower than that of PVP. It is clear that it is obtained.

  As described above, from the comparison of Embodiment 3 and Comparative Example (4) to Comparative Example (6), the conductivity having excellent adhesion strength is obtained by adding PNVA with almost no decrease in the electrical conductivity of PPy. It became clear that a protective film was obtained.

The conductive composition according to the present invention can be easily formed into a thin film, has almost no decrease in electrical conductivity due to the addition of a binder, and is excellent in adhesion to a substrate. Therefore, it is extremely useful as an antistatic material.
In the above embodiment, only PEDOT doped with PSS and PPy doped predominantly with ANS are described, but the same effect can be obtained when other dopants are doped. It is not limited to the kind of. Moreover, although only the case where PEDOT and PPy were used was described, other π-conjugated double bond conductivity can also be used, and the present invention is not limited to that type. Moreover, although only the case where potassium persulfate and iron (III) sulfate were mixed and used as an oxidizing agent was described, it may be used alone, and the persulfate is one using other cations such as ammonium, for example. Can also be used. Although only the case where iron (III) is used as the transition metal oxidant has been described, other transition metal salts such as cerium (IV) can also be used. Any transition metal that can oxidatively polymerize a polymerizable monomer may be used, and the present invention is not limited to that type.

ｍｍ銅製の陰極リードを前記銀ペイント接着した。加熱条件は１１０℃で１時間である。このようにして平板型アルミニウム固体電解コンデンサを１０個作製した。図２にその断面概要図を示す。(Embodiment 4)
As shown in FIG. 1, an aluminum lead having a diameter of 1 mm was welded to one end of an aluminum etched foil (width 5 mm, length 7 mm) having a thickness of 100 μm to form a capacitor anode. Ten anodes were prepared. An anodized film was formed on this anode at 70 ° C./16 V using a 3% ammonium adipate aqueous solution. The capacitance at 120 Hz was 18.5 μF. 5% by weight of DMSO was added to the conductive polymer dispersion prepared in Embodiment 1 to prepare a PEDOT dispersion for forming a cathode conductive layer. The anode was dipped in the dispersion and dried at 110 ° C. This operation is repeated twice to form a cathode conductive layer consisting of a PEDOT layer using PVNA as a binder.

A silver lead made of mm copper was bonded to the silver paint. The heating condition is 110 ° C. for 1 hour. In this manner, 10 flat aluminum solid electrolytic capacitors were produced. FIG. 2 shows a schematic sectional view thereof.

The capacitance and loss factor at 120 Hz of this capacitor were measured with an LCR meter 4263B (manufactured by Agilent). The average value of the capacitance was 15.7 μF (average capacity achievement rate of 85%), and the average value of the loss coefficient was 1.5%.
Furthermore, the frequency characteristic of the impedance was measured with an impedance analyzer (Agilent 4294A). An example of the result is shown in FIG. It became clear that the impedance frequency characteristic reflecting the high electrical conductivity of the conductive composition used for the cathode conductive layer was exhibited. Further, by using PNVA as a binder, the adhesiveness to the dielectric film was excellent, and it was able to withstand thermal stress when forming a current collector made of carbon paint and silver paint, and no capacity deterioration due to peeling was observed.

Since the capacitor obtained by the present invention is excellent in the heat resistance of PEDOT of the cathode conductive layer, a surface mount type configuration can be easily achieved by resin molding. Further, since in-situ polymerization which has been indispensable until now becomes unnecessary, a solid electrolytic capacitor having ideal frequency characteristics can be easily obtained at low cost.
Since PPy doped with ANS is also excellent in heat resistance, a solid electrolytic capacitor with excellent characteristics can be realized as in the case of PEDOT. The deterioration of the electrical conductivity of PPy doped with ANS is mainly due to oxidation of the pyrrole ring, and a practical level of heat resistance can be imparted by suppressing oxygen permeation by the exterior. Note that the capacitor of the present invention can be easily stacked, and the capacity can be increased by stacking.

  In the conductive composition according to the present invention, PNVA is allowed to coexist, PNVA interacts in the polymerization process of the conductive polymer, conductive polymer fine particles having high dispersibility are formed, and polymerization conductive Since the threshold value for forming the percolation of the conductive polymer fine particles is low, the decrease in electric conductivity caused by the binder as seen in the conventional binder is extremely small, and a film having high electric conductivity can be obtained.

  The conductive composition obtained in the present invention is useful as an antistatic material because of its high electrical conductivity and excellent adhesion to the substrate. By coating on another insulating polymer film, it can be used as an antistatic packaging material, for example, for packaging electronic devices that may fail due to charging. Moreover, it becomes possible to manufacture an antistatic fiber easily by thinly coating the fiber surface.

  The conductive composition according to the present invention can be used as a cathode conductive layer of a capacitor. The capacitor according to the present invention can be easily formed by applying or dipping the cathode conductive layer. And since the electrical conductivity of the electrically conductive composition used is high, an ideal impedance-frequency is shown. It is not necessary to form a cathode conductive layer using a conductive polymer by conventional in-situ polymerization, the process is easy, and no loss of the conductive polymer monomer occurs. Therefore, a high performance solid electrolytic capacitor can be manufactured at low cost.

  In addition to the above, the conductive composition according to the present invention includes, for example, organic EL charge transport layers, solar cell electrodes, alternatives to transparent electrodes made of ITO, and positive electrode constituent materials for lithium secondary batteries. Thus, it can be applied to electronic devices, energy devices and the like, and the industrial applicability is extremely high.

1: Anode foil 2: Anode lead 3: Anodized coating 4: Conductive composition layer 5: Carbon layer 6: Silver paint layer 7: 7 Anode lead

Claims (12)

  A conductive composition comprising a conjugated double bond conductive polymer doped with anions and poly-N-vinylacetonitrile (PNVA).   The conductive composition according to claim 1, wherein the conjugated double bond conductive polymer has a pyrrole or thiophene ring as a repeating unit.   The conductive composition according to claim 1, wherein the conjugated double bond conductive polymer has 3,4-ethylenedioxythiophene (EDOT) or pyrrole as a repeating unit.   The conductive composition according to claim 1, wherein a conductive composition comprising a conjugated double bond conductive polymer doped with anions and poly-N-vinylacetonitrile (PNVA) is dispersed in a liquid medium.   The conductive composition according to claim 4, wherein the liquid medium contains at least water.   Production of a conductive composition obtained by polymerizing the polymerizable monomer in a liquid medium in which a polymerizable monomer that forms PNVA and a conjugated double bond conductive polymer and an oxidizing agent for polymerizing the polymerizable monomer coexist Method.   The method for producing a conductive composition according to claim 6, wherein the conjugated double bond conductive polymer has a pyrrole or thiophene ring as a repeating unit.   The method for producing a conductive composition according to claim 7, wherein the conjugated double bond conductive polymer has 3,4-ethylenedioxythiophene (EDOT) or pyrrole as a repeating unit.   The method for producing a conductive composition according to claim 6, wherein the liquid medium contains at least water.   The method for producing a conductive composition according to any one of claims 6 to 9, comprising at least one selected from transition metal salts or persulfates as an oxidizing agent.   An antistatic material on which the conductive composition layer according to claim 1 is formed.   A solid electrolytic capacitor using the conductive composition according to claim 1 for a cathode conductive layer.

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