A high-density, acid-resistant and oxidation-resistant solid capacitor carbon foil production process

Abstract

The invention relates to a high-density, acid-resistant and oxidation-resistant solid capacitor carbon foil production process. The process steps are as follows: add half of the binder to the polymer solvent, and add acidified acidified carbon nanotubes mixed with carbon nanotubes. Nano conductive carbon fiber system, and then mixed with the other half of the binder and processing aids to obtain a slurry, which is double-sided coated on both sides of the corroded aluminum foil with a gravure coater, and the coating thickness is 20-42 μm. Cutting, inspection and packaging of solid capacitor carbon foil; using unique nano-conductive paste, coating on both sides of corroded aluminum foil by coating process, after interface treatment, it can be tightly combined and completely covered, which is beneficial to reduce process difficulty and improve carbon foil compactness , carbon foil products have excellent thermal oxidation resistance, and have wider adaptability to heating and patch reflow temperatures in the production process of solid aluminum electrolysis.

Description

technical field [0001] The invention relates to a high-density, acid-resistant and oxidation-resistant solid capacitor carbon foil production process, which belongs to the technical field of solid capacitor carbon foil. Background technique [0002] In view of the many problems of liquid electrolytic capacitors, solid aluminum electrolytic capacitors came into being. The use of solid aluminum electrolytic capacitors can directly improve the performance of the motherboard and effectively provide stable and abundant power. Solid capacitor carbon foil is used as a cathode foil for solid capacitors. Generally, aluminum foil is used as the base mold and composited with a graphite layer structure. In the composite process, physical sputtering technology is generally used-the surface of the target is bombarded by ions, and argon gas is filled into the vacuum. A low-pressure argon atmosphere is formed in the cavity, and then high voltage is used to generate a glow discharge to accel...

AI Technical Summary

Problems solved by technology

Solid capacitor carbon foil is used as a cathode foil for solid capacitors. Generally, aluminum foil is used as the base mold and composited with a graphite layer structure. In the composite process, physical sputtering process is generally used-the surface of the target is bombarded by ions, and argon gas is filled into the vacuum. A low-pressure argon atmosphere is formed in the cavity, and then a glow discharge is generated by using a high voltage to accelerate ions to the surface of the target, so that the target material is bombarded out, and the upper and lower graphite layers are respectively plated by magnetron sputtering. This process is prepared Carbon foil dot-like carbon particle spread coating, the particles are close to a single layer, and the rolling lines of the aluminum foil are visible; or chemical vapor deposition process-using one or several gas phase compounds or simple substances containing thin film elements, chemically carried out on the surface of the substrate Thin films are produced by reaction. The carbon foil prepared by this process has dot-like particle accumulation coating and accumulation pores, which leads to poor precision coverage performance. It is difficult to appear cracks when the process control is slightly adjusted, which affects the carbon foil. Excellent acid and oxidation resistance, service life is reduced

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