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Hybrid electrolytic capacitor and method of manufacturing same

An electrolytic capacitor, a hybrid technology, applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, solid electrolytic capacitors, etc., can solve the problems of insufficient evaluation and increased leakage current of solid electrolytic capacitors, and achieve low ESR, high electrostatic capacitance, high temperature The effect of durability

Pending Publication Date: 2022-08-05
NIPPON CHIMI CON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] According to the hybrid electrolytic capacitor, the problem of an increase in the leakage current of the solid electrolytic capacitor can be solved. In addition, by providing an inorganic conductive layer on the cathode of the capacitor, a high capacitance can be achieved. Evaluation of the capacitance of the conventional hybrid electrolytic capacitor Generally, as shown in Patent Document 2 and Patent Document 7, it is only performed under the condition of a frequency of 120 Hz, and the evaluation in the high frequency range is insufficient.

Method used

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  • Hybrid electrolytic capacitor and method of manufacturing same
  • Hybrid electrolytic capacitor and method of manufacturing same
  • Hybrid electrolytic capacitor and method of manufacturing same

Examples

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preparation example Construction

[0083] The dispersion liquid is prepared, for example, by adding a monomer, a dopant-releasing acid or a salt thereof, and an oxidizing agent to water as a dispersion medium, stirring until the completion of chemical oxidative polymerization, and then using ultrafiltration, cationic The oxidizing agent and residual monomer are removed by purification methods such as exchange and anion exchange, and then, if necessary, dispersion treatment such as ultrasonic dispersion treatment, high-speed fluid dispersion treatment, and high-pressure dispersion treatment is applied. As the monomer, the monomer having a π-conjugated double bond given above for forming the organic conductive layer can be used, and a monomer selected from thiophenes having substituents at the 3-position and the 4-position can be preferably used. Substituents at the 3- and 4-positions of the thiophene ring may form a ring together with the carbons at the 3- and 4-positions. In particular, 3,4-(ethylenedioxythioph...

Embodiment 1

[0092] As a cathode substrate for obtaining a cathode, an aluminum foil in which a sponge-like pit was formed was used. A chemical conversion treatment was applied to the aluminum foil using an aqueous solution of ammonium dihydrogen phosphate as a chemical conversion solution, and a chemical conversion voltage of 5.0 V was formed on the surface of the aluminum foil. fs The chemical oxide film (oxide layer). Then, a vapor-deposited film containing titanium carbide is formed on the surface of the chemical conversion oxide film by arc ion plating to obtain a support having a vapor-deposited titanium carbide film (inorganic conductive layer).

[0093] Into a glass container, 50 mL of distilled water was introduced and heated to 40°C. To this liquid was added 0.021M 3,4-(ethylenedioxythiophene) (hereafter, 3,4-(ethylenedioxythiophene) is represented as "EDOT", and poly(3,4-(ethylenedioxythiophene) was Ethylenedioxythiophene)) is represented by PEDOT.) and 0.08M ammonium boronate...

Embodiment 2

[0100] Using the polymerization solution for electrolytic polymerization used in Example 1, at 0.1 mA / cm 2 Galvanostatic electropolymerization was carried out for 2 minutes under the conditions of / cm 3 The density of , except this point, repeat the procedure of Example 1.

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Abstract

Provided is a hybrid electrolytic capacitor having high capacitance, low ESR, excellent high-frequency characteristics, and high high-temperature durability. This hybrid electrolytic capacitor (1) is provided with: a cathode (10) having a cathode base (11) formed from a valve metal, an oxide layer (12) provided on the surface of the cathode base (11), an inorganic conductive layer (13) provided on the surface of the oxide layer (12) and containing an inorganic conductive material, and an organic conductive layer (14) provided on the surface of the inorganic conductive layer (13) and containing a conductive polymer; an anode (20) having an anode base (21) formed from a valve metal and a dielectric layer (22) provided on the surface of the anode base; and a composite electrolyte layer (30) having a solid electrolyte layer (31) containing conductive polymer particles (31a) provided between and in contact with the organic conductive layer (14) of the cathode (10) and the dielectric layer (22) of the anode (20), and an electrolyte solution (32) filled between the conductive polymer particles (31a) of the solid electrolyte layer (31).

Description

technical field [0001] The present invention relates to a hybrid electrolytic capacitor including a composite electrolyte layer including a solid electrolyte layer containing a conductive polymer and an electrolyte solution impregnated in a gap of the solid electrolyte layer, and a method for producing the same. Background technique [0002] With the miniaturization and speed-up of electronic equipment, high capacitance, low equivalent series resistance (hereafter, the equivalent series resistance is referred to as "ESR"), and excellent high-frequency characteristics are increasingly required for capacitors used in power supply circuits and the like. and high high temperature durability. Electrolytic capacitors with anodes, electrolytes, and cathodes have high electrical conductivity and high thermal decomposition temperature derived from monomers with π-conjugated double bonds, such as substituted or unsubstituted thiophene, pyrrole, and aniline. A solid electrolytic capac...

Claims

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Application Information

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IPC IPC(8): H01G9/055H01G9/00H01G9/028H01G9/145H01G9/15
CPCH01G9/145H01G9/15H01G9/055H01G9/028H01G9/0036H01G9/0425H01G9/0032
Inventor 小关良弥长原和宏町田健治
Owner NIPPON CHIMI CON CORP
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