Electrochemical polymerization process for forming solid electrolyte layer on solid electrolytic capacitor

Abstract

The invention provides an electrochemical polymerization process for forming a solid electrolyte layer on a solid electrolytic capacitor, which comprises the following step of: carrying out constant current polymerization in an electrochemical polymerization solution to prepare a second solid electrolyte layer by connecting the surface of an anode body on which a solid electrolyte layer is formed by a chemical polymerization process with an external electrode as an anode and using a conductive electrode as a cathode, wherein the pH value of the electrochemical polymerization solution is controlled to range from 3.0-6.0. The electrochemical polymerization process for forming a solid electrolyte layer on a solid electrolytic capacitor enables the properties of the solid electrolytic capacitor produced by the electrochemical polymerization process to be more controllable, the electrolytic capacitor prepared in the range of the pH value is better in properties such as capacitance, loss, ESR and the like, and the polymerization process simplifies the process flow and improves the process efficiency.

Description

【Technical field】 [0001] The invention relates to specific procedures in the production process of solid electrolytic capacitors, in particular to an electrochemical polymerization process for forming a solid electrolyte layer in solid electrolytic capacitors. 【Background technique】 [0002] Capacitors belong to the basic components of the electronic information industry. They are the most widely used and irreplaceable electronic components. Their output accounts for about 40% of the electronic components. The variety is increasing, and the demand for matching capacitors is also increasing. The performance, variety and quality of capacitors directly determine or affect the development of electronic information products. In order to solve the problem of adapting the traditional liquid electrolytic capacitor to surface mount technology, chip type and miniaturization, it is necessary to solve the solidification of the electrolyte. Solid electrolytic capacitors have many advan...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an electrochemical polymerization process for forming a solid electrolyte layer in a solid electrolytic capacitor, by specifically limiting the pH range of the polymerization solution of the conductive polymer and optimizing the regulation method of the pH value of the solution, The performance of the prepared polymer electrolytic capacitor is better, and the preparation process is simplified, which can solve the problem that the pH range of the polymerization solution in the prior art is not limited, and the conductivity of the conductive layer prepared beyond the appropriate pH range cannot be obtained. control, leading to the problem that the performance of the solid electrolytic capacitor cannot reach the expected purpose, and it can also solve the problem of poor stability of the polymerization solution and the cumbersome operation process of pH value adjustment in the prior art