Coating-enhanced carbonization-free solid electrolytic capacitor paper and preparation method thereof

Abstract

The invention belongs to the field of electrolytic capacitor paper and specifically relates to coating-enhanced carbonization-free solid electrolytic capacitor paper and a preparation method thereof.Raw materials of the electrolytic capacitor paper are composed of wood pulp and chemical fibers; the wood pulp has the pulping degree of 5-25degree SR and the wet weight of 10-30 g; the chemical fibers have the length of 1.5-15 mm and the fiber number of 0.1-3 dtex; the raw materials are in drying mass percentage: 10-80% of wood pulp and 20-90% of chemical fibers; and the surface of the electrolytic capacitor paper is coated with a reinforced layer in a spraying or dipping way, and the coating quantity accounts for 1-10% of absolute dry mass of paper sheets after coating. By coating the papersheets, the strength of the paper sheets can be further improved, and the smooth production of a capacitor is more favorably guaranteed.

Description

technical field [0001] The invention belongs to the field of electrolytic capacitor paper, in particular to a coating-enhanced carbonization-free solid electrolytic capacitor paper and a preparation method thereof. Background technique [0002] The electrolyte in a solid electrolytic capacitor is a solid conductive polymer material. The structure of a solid electrolytic capacitor includes an anode, a cathode, electrolytic paper, and a solid conductive polymer material. Electrolytic capacitor paper is one of the indispensable raw materials for the preparation of electrolytic capacitors. In capacitors, it is mainly used to absorb monomers and oxidants to form polymers. At the same time, it plays the role of isolating plates and prevents short circuits caused by direct contact between anode and cathode. [0003] The traditional electrolytic capacitor paper is all cellulose material, which has a weak adsorption capacity for monomers. At the same time, cellulose contains a large ...

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Problems solved by technology

Under this process, the entire capacitor needs to be heated to a higher temperature, the production process is complicated, and the high-temperature carbonization process will cause damage to the structure of the cathode and anode foils, resulting in unstable product performance and easy leakage current exceeding the standard; in addition, due to heating The high temperature consumes a lot of energy, which increases the production cost of the enterprise to a certain extent.

[0004] Therefore, in order to simplify the production process of solid electrolytic capacitors and reduce production energy consumption, a carbonization-free solid electrolytic capacitor paper was developed (patent application number: 2018091011182, application date: September 10, 2018), which is conductive to Polymer monomers have good adsorption properties, and will reduce the side reactions during the polymerization of conductive polymer monomers. At the same time, there is no need to carbonize the capacitor paper during the capacitor production process, but the strength of the solid electrolytic capacitor paper is not enough.

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