Method for producing electrolytic capacitor

Abstract

The invention discloses a method for producing an electrolytic capacitor. At least one cross-linking agent is applied to a capacitor body; after the cross-linking agent is applied, applying a solution with a conjugated polymer on the capacitor body; and removing part of the solvent in the solution to form a polymer outer layer on the capacitor body. Wherein the capacitor body comprises an electrode body, an electrode material, a dielectric medium and a solid electrolyte, the electrode material is formed on the electrode body, the dielectric medium covers the surface of the electrode material, and the solid electrolyte covers the dielectric medium. Wherein the electrode body or the solid electrolyte is formed by at least one of polythiophene with at least one sulfonic acid group and polyselenophene with at least one sulfonic acid group.

Description

Technical field [0001] The present invention relates to a method of producing a capacitor, in particular to a method of producing an electrolytic capacitor. Background [0002] Commercially available solid electrolyte capacitors typically include: porous metal electrodes, oxide layers on the surface of porous metal electrodes, solid electrolytes bound within the porous structure of porous metal electrodes, external electrodes (connectors) such as silver layers, and electrical connectors and envelopes (encapsulation). [0003] Examples of solid electrolyte capacitors include capacitors prepared using tantalum, aluminum, niobium and niobium oxides as materials, using charge transfer complexes or pyrolite or polymer solid electrolytes. The advantage of using a porous body is that a high surface area produces a high capacitance density, that is, high capacitance can be achieved in a small space. [0004] π-conjugated polymers are particularly suitable for use as solid electrolytes d...

AI Technical Summary

Problems solved by technology

However, PETDOT:PSS still has some problems to be overcome

[0008] For example, PEDOT:PSS is generally produced by in-situ polymerization, and the particle size of PEDOT:PSS formed by in-situ polymerization is relatively large, so that PEDOT:PSS cannot be effectively filled inside the porous metal body.

Therefore, when the capacitor is impregnated in a solution containing PEDOT:PSS, there is usually a problem of poor impregnation

[0009] Moreover, PEDOT:PSS itself has the characteristics of easy water absorption, but the capacitor components are sensitive to moisture. Once PEDOT:PSS absorbs moisture in the environment and makes the capacitor components contact with moisture, the electrical characteristics of the capacitor components may be affected. negative effects, or even outright failure

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