Aluminum electrolytic capacitor and electrode architecture for aluminum electrolytic capacitor

A technology of aluminum electrolytic capacitors and structures, applied in electrolytic capacitors, capacitors, circuits, etc., can solve problems such as cracks, peeling, and limited thickness, and achieve the effect of improving conductivity

Active Publication Date: 2017-11-03
CAPXON ELECTRONIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the thickness of the dielectric layer is increased to increase the electrostatic capacity, defects such as cracks will occur, and the adhesion between the aluminum substrate and the dielectric layer or the adhesion between the dielectric layers will be large. drop in magnitude
Therefore, in the above method, the thickness that may be formed on the aluminum substrate is limited, and the resulting capacity value is also limited.
Also, when a voltage is applied by this method, since a dielectric film is formed between the base aluminum and the dielectric layer, causing peeling, it is limited to use as a negative electrode of a conductive polymer solid aluminum electrolytic capacitor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 20 weights of aluminum powder with an average particle diameter of 1.5um, 5 weights of organic binder polyester resin, 10 weights of organic valve metal compound tetraisopropyl titanate (CAS: 546-68-9), 10 weights of solvent toluene and toluene 10 weight of ethyl ethyl ketone, these were mixed and stirred for 20 minutes with a ball mill. Apply the obtained paint on an aluminum foil with a thickness of 30 um and an aluminum purity of 99.9%. The final thickness of the coating film is 5 um, and it is dried in a drying oven at 120°C for 30 minutes. Cloth film.

[0060] After that, the aluminum foil forming the coating film was compressed with a roller, and then heat-treated for 1H in nitrogen gas at 450°C. Then, the heat treatment temperature was set to 630° C. in a nitrogen atmosphere, and heat treatment was performed for 3 hours. Then, reduction heat treatment was performed for 5 hours in a hydrogen atmosphere at 630°C. The electrode structure that has undergone reduct...

Embodiment 2

[0065] 40 weights of aluminum powder with an average particle size of 5um, 5 weights of organic binder polyester resin, 5 weights of organic valve metal compound isopropyl titanate (CAS: 546-68-9), 10 weights of toluene and methyl ethyl Ketone 10 weight, the above material was mixed and stirred for 20 minutes with a ball mill. Apply the obtained coating on aluminum foil with a thickness of 30um and a purity of 99.9%, and use a coating machine to coat a coating film with a final thickness of 20um. After drying in a drying oven at 120°C for 30 minutes, the reverse side is also treated in the same way. A coating film is formed. After that, as in Example 1, the same heating and sintering process and reduction heating process were carried out. Then, a direct current with a current density of 25mA / cm2 was passed in a 15wt% ammonium adipate aqueous solution at a temperature of 85°C, and the voltage was raised to 20V and kept for 10 minutes. After washing and drying, the same as in ...

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PUM

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Abstract

The invention provides an aluminum electrolytic capacitor and electrode architecture for the aluminum electrolytic capacitor. The electrode architecture is formed through the following steps: forming a coating containing organic oxide (composed of aluminum powder and aluminum alloy powder and valve metal), an organic binding agent and an organic solvent on an aluminum substrate; generating a sintering layer by performing drying, heating and sintering engineering, performing reduction heating engineering, and then performing the anode oxidation to manufacture the electrode architecture for high-capacity anode and negative foil for the aluminum electrolytic capacitor.

Description

technical field [0001] The present invention relates to a method for manufacturing an electrode structure used as an electrode material for an aluminum electrolytic capacitor, an electrode structure, and an aluminum electrolytic capacitor including the electrode structure. technical background [0002] A capacitor has two electrodes, a positive and a negative. The positive electrode material of the capacitor is a valve metal such as aluminum or tantalum that can form an insulating oxide film on the surface. Here, the so-called valve metal is a metal covered with an oxide film by anodic oxidation, for example, there are aluminum, tantalum, niobium, titanium, hafnium, and the like. [0003] The negative electrode material is electrolyte, inorganic semiconductor, organic conductive material or metal thin film and the like. When the negative electrode material is an electrolytic solution, aluminum foil with an enlarged surface area is often used for the negative electrode term...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/045
CPCH01G9/045
Inventor 王润申林金村
Owner CAPXON ELECTRONIC (SHENZHEN) CO LTD
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