Novel solid aluminum electrolytic capacitor and production method thereof

Abstract

A novel solid aluminum electrolytic capacitor comprises an anode foil, electrolytic paper and a cathode foil. The anode foil, the electrolytic paper and the cathode foil are wound into a core package,a high-molecular conductive polymer is formed between the anode foil and the cathode foil, and polyallyl glycidyl ether is crosslinked on the high-molecular conductive polymer. According to the invention, when the high-molecular conductive polymer is impregnated, the viscosity of a high-molecular conductive polymer dispersion liquid is reduced due to the addition of the polyallyl glycidyl ether so that the high-molecular conductive polymer is more easily impregnated into the deep part of the core package when the core package is impregnated, and the capacity of the solid aluminum electrolyticcapacitor is increased. And meanwhile, the polyallyl glycidyl ether and the high-molecular conductive polymer are mutually crosslinked so that cracks generated by the high-molecular conductive polymer can be effectively relieved in the charge-discharge cycle of the solid aluminum electrolytic capacitor, and the charge-discharge cycle performance of the solid aluminum electrolytic capacitor is improved.

Description

Technical field [0001] The present invention relates to a solid aluminum electrolytic capacitor, in particular, a solid aluminum electrolytic capacitor having a high capacity and a good cycle performance and a preparation method thereof. Background technique [0002] The anode of the aluminum electrolytic capacitor is composed of aluminum metal, and there is a lot of corrosion pits formed on the surface of the anode foil, and an electrical dielectric oxide film is formed on the surface of the anode foil, that is, an aluminum oxide film. The conductive electrolyte contact with the oxide film takes the role of the true cathode in the electrolytic capacitor. As the actual cathode of the capacitor, the good and bad electrolyte is highly affected by the electrical properties of the aluminum electrolytic capacitor. [0003] In order to seek a large capacity of the aluminum electrolytic capacitor, a core package is wound around the electrolyte paper between the anode foil and the cathod...

AI Technical Summary

Problems solved by technology

One is that the core contains impregnated high molecular conductive polymer monomers, and then polymerized under the action of an oxidizing agent; this method will introduce impurities and make the removal of impurities very troublesome

The second is to directly impregnate the dispersion liquid of high molecular conductive polymer, but the viscosity of general high molecular conductive polymer dispersion is high, which makes it difficult for the core bag to be impregnated into the depth of the core bag, which makes it necessary to reduce the concentration of high molecular conductive polymer. The concentration in the dispersion liquid, so that the amount of polymer conductive polymer impregnated into the core package is reduced, resulting in too many holes in the polymer conductive polymer inside the core package, which affects the cycle performance of solid aluminum electrolytic capacitors