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A kind of three-dimensional porous aluminum electrode foil and its preparation method

An aluminum electrode foil, three-dimensional porous technology, applied in the direction of circuits, capacitors, electrical components, etc., can solve the problems of poor bonding force, easy peeling off of the film, and difficulty in stable energy production, etc., to achieve high specific volume, good bonding force, The effect of good mechanical properties

Active Publication Date: 2020-09-18
浙江洪量新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to increase the thickness of sputtering and evaporation. It is suitable for cathode or low-voltage foil. Because medium and high voltages and ultra-high voltages require fewer defects to reduce leakage current and improve the service life of capacitors, high dielectric materials such as TiO are also used. 2 Substances with high dielectric constants, such as high-voltage and ultra-high-voltage, have poor binding force and easy film peeling, making it difficult for practical application.
These methods have problems such as poor strength, large leakage, and difficulty in stabilizing into anode energization production and capacitor winding production.
Patent CN 104919552A is a manufacturing method of etching the sintered film, but after acid-base treatment, it brings difficulty to environmental protection treatment, and there are problems such as difficulty in stable energy production

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  • A kind of three-dimensional porous aluminum electrode foil and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Aluminum powder with an average particle size D50 of 3 μm is pushed onto a 30 μm aluminum foil substrate by powder spraying or a screw pump, and the surface uniformity of one side is controlled by a scraper so that the surface roughness of the powder does not exceed ±8 μm. 1. Control the pressure to 200Kg, preliminarily compact the aluminum powder, and control the thickness of one side to be 50 μm; then carry out thermal treatment at 570 ° C under the protection of argon gas under the support of ceramic rollers, and then heat the aluminum foil coated with aluminum powder on the surface to 50 μm. When cooling to 300°C, the porosity and thickness are controlled by the cold pressure roller 2, the preferred pressure is 20Kg, and the porosity is 40%; repeat the above process, compound 50μm aluminum powder on the other side of the aluminum substrate, and obtain a total thickness of 130μm Thermal composite porous foil, thermal composite porous aluminum foil is energized with mi...

Embodiment 2

[0045] The aluminum powder with an average particle size D50 of 5 μm is pushed onto a 30 μm aluminum foil substrate by powder spraying or a screw pump, and the surface uniformity of one side is controlled by a scraper so that the surface roughness of the powder does not exceed ±8 μm. 1. The control pressure is 150Kg, and the aluminum powder is preliminarily compacted; then, the 800mm aluminum foil coated with aluminum powder on the surface is supported by a ceramic roller and subjected to thermal treatment at 570°C under the protection of argon gas. When it is cooled to 300°C, pass The cold pressure roller 2 controls the porosity and thickness, the preferred pressure is 20Kg, and the porosity is 35%; repeat the above process, and compound 50 μm aluminum powder on the other side of the aluminum substrate to obtain a thermal composite porous foil with a total thickness of 130 μm; The thermal composite foil is energized by mixed acid. During the hydration process, 0.05% hydrogen p...

Embodiment 3

[0047] Aluminum powder with an average particle size D50 of 3 μm is pushed onto a 30 μm aluminum foil substrate by powder spraying or a screw pump, and the surface uniformity of one side is controlled by a scraper so that the surface roughness of the powder does not exceed ±8 μm. 1. The control pressure is 100Kg, and the aluminum powder is preliminarily compacted; then, the 800mm aluminum foil coated with aluminum powder on the surface is supported by a ceramic roller and subjected to thermal treatment at 630°C under the protection of argon. When it is cooled to 300°C, pass The cold pressure roller 2 controls the porosity and thickness, the preferred pressure is 15Kg, and the porosity is 40%. Repeat the above process, and compound 50 μm aluminum powder on the other side of the aluminum substrate to obtain a thermal composite porous foil with a total thickness of 130 μm; The thermal composite foil is energized by mixed acid. During the hydration process, 0.05% hydrogen peroxide ...

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Abstract

The invention provides a novel three-dimensional porous aluminum electrode foil, which comprises an aluminum foil base material and a composite porous aluminum film formed on both sides of the aluminum foil base material by mixed powder, and the total thickness of the electrode foil is 80 [mu]m-200 [mu]m, voltage 300-600V, bending times 50-340 cycles, the specific volume is 0.70-2.55[mu]F / cm<2>. At the same time, the invention also provides a method for preparing the novel three-dimensional porous aluminum electrode foil. Firstly, aluminum powder, aluminum fiber and high-dielectric oxide powder are uniformly mixed into a mixed powder; 2, uniformly disper that mixed pow on both sides of the aluminum foil substrate, and compacting the mixed pow to form a densely piled porous foil; The porousfoil was then thermally treated and the porosity was controlled at 35% by extrusion. 45%, thickness 80 [mu]m-200[mu]m; Finally, the porous aluminum electrode foil after heat treatment is subjected toenergizing treatment. The three-dimensional porous aluminum electrode foil provided by the invention has the characteristics of high specific capacitance and high strength, and the composite porous aluminum film on the aluminum foil substrate has no cracking and no peeling off in the production process, and has good adhesion and the like.

Description

technical field [0001] The invention relates to a novel three-dimensional porous aluminum electrode foil for aluminum electrolytic capacitors, in particular to an anode electrode foil for medium-high voltage and ultra-high voltage aluminum electrolytic capacitors and a manufacturing method thereof. Background technique [0002] Electrode foil is the key raw material of aluminum electrolytic capacitors. Aluminum electrolytic capacitors are one of the three major components that must be used in various household appliances, computers, communication equipment, and automation equipment. The quality of the electrode foil is related to the service life of the capacitor and directly affects the service life of the electronic machine. With the rapid development of the electronics industry, aluminum electrolytic capacitors are used more widely, and the requirements for miniaturization, long life, and high reliability are increasingly urgent, and electrode foil processing technology h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/048H01G9/055H01G9/045C22C1/08B22F3/11B22F7/04
CPCB22F3/11B22F7/004H01G9/045H01G9/048H01G9/055
Inventor 陈畅京
Owner 浙江洪量新材科技有限公司