Electrochemical polymerization solution and electrochemical polymerization process for preparing solid electrolyte layer on capacitor

Abstract

The invention provides an electrochemical polymerization solution and an electrochemical polymerization process for preparing a solid electrolyte layer on a capacitor. In the electrochemical polymerization solution, water, an organic solvent containing hydroxyl groups, a mixed solution of water and the organic solvent containing hydroxyl groups or a mixture of more than two kinds of organic solvents is taken as the solvent. The electrochemical polymerization process comprising the following steps: an anode body provided with a first solid electrolyte layer on the surface is connected with an external electrode to serve as an anode, a conductive electrode is adopted as a cathode, the constant current polymerization is performed in the electrochemical polymerization solution, then the anode and the cathode are cleaned and dried after being taken out, and a second solid electrolyte layer is prepared. The electrochemical polymerization solution has the advantages of wide raw materials, extremely low toxicity and easily-controlled large-scale production. Through the adoption of the electrochemical polymerization process, the rate of capacitance withdrawing of the solid electrolytic capacitor can be promoted, the ESR (equivalent series resistance) can be reduced, and the reliability can be enhanced at high temperature and high humidity.

Description

【Technical field】 [0001] The invention relates to a preparation process of a solid electrolytic capacitor, in particular to an electrochemical polymerization solution and a process for forming a solid electrolyte layer of the solid electrolytic capacitor. 【Background technique】 [0002] With the development of modern electronic products, high-frequency electronic equipment has also developed rapidly. For solid electrolytic capacitors used in the periphery of CPUs of personal computers, there is an increasing demand for large-capacity and excellent high-frequency characteristics. In order to obtain an electrolytic capacitor with excellent high-frequency characteristics, the equivalent series resistance (ESR) of the solid electrolytic capacitor must be sufficiently reduced. Therefore, conductive polymers are used as the electrolyte of solid electrolytic capacitors in the industry, so that the equivalent series resistance component of solid electrolytic capacitors is small and...

AI Technical Summary

Problems solved by technology

However, although electrolytes with higher conductivity can be obtained, the medium performance reflected in solid electrolytic capacitors is relatively general, and in large-scale production, it is necessary to control the diffusion of toxicity and the large amount of volatilization of solvents, and the cost of control is extremely high

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