Unlock instant, AI-driven research and patent intelligence for your innovation.

A chemical formation method for reducing the leakage current of electrode foil

A chemical formation method and leakage current technology, applied in anodic oxidation, capacitor electrodes, electrolytic coatings, etc., can solve problems such as specific volume attenuation, achieve the effects of reducing leakage current and inhibiting excessive generation

Active Publication Date: 2020-07-24
YIDU DONGYANGGUANG FORMED FOIL
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After high temperature treatment, only a small part of the hydrated alumina will be transformed, or after conventional acid dipping treatment, only a part of the hydrated alumina will be dissolved. If the treatment is too strong, the specific volume will be seriously attenuated.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A chemical formation method for reducing the leakage current of electrode foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A. The corroded foil is treated in pure water at 90-100°C for 10 minutes;

[0040] B. Place the foil treated with pure water in step A in a boric acid solution with a mass fraction of 8%, and control the temperature to 85°C to perform the first-stage formation, the formation voltage is 150V, and the formation time is 12 minutes;

[0041] C. Dip the foil after the first-stage chemical formation in step B into an aqueous solution of nitrilotriacetic acid with a mass fraction of 5%, the treatment voltage is 50V, the treatment time is 5min, and the temperature is 40°C;

[0042] D. Place the foil after the solution treatment in step C in a boric acid solution with a mass fraction of 8%, and control the temperature to 85°C to perform the second-stage formation, the formation voltage is 320V, and the formation time is 12 minutes;

[0043] E. Dip the foil after the second-stage chemical formation in step D into an aqueous solution of nitrilotriacetic acid with a mass fraction o...

Embodiment 2

[0056] A. The corroded foil is treated in pure water at 90-100°C for 10 minutes;

[0057] B. Place the foil treated with pure water in step A in a boric acid solution with a mass fraction of 8%, and control the temperature to 85°C to perform the first-stage formation, the formation voltage is 150V, and the formation time is 12 minutes;

[0058] C. Dip the foil after the first-stage chemical formation in step B into an 8-hydroxyquinoline aqueous solution with a mass fraction of 8% for treatment, the treatment voltage is 50V, the treatment time is 10min, and the temperature is 60°C;

[0059] D. Place the foil after the solution treatment in step C in a boric acid solution with a mass fraction of 8%, and control the temperature to 85°C to perform the second-stage formation, the formation voltage is 320V, and the formation time is 12 minutes;

[0060] E. Dip the foil after the second-stage chemical formation in step D in an 8-hydroxyquinoline aqueous solution with a mass fraction ...

Embodiment 3

[0073] A. The corroded foil is treated in pure water at 90-100°C for 10 minutes;

[0074] B. Place the foil treated with pure water in step A in a boric acid solution with a mass fraction of 8%, and control the temperature to 85°C to perform the first-stage formation, the formation voltage is 150V, and the formation time is 12 minutes;

[0075] C. Dip the foil after the first-stage chemical formation in step B into an aqueous solution of ethylenediaminetetraacetic acid with a mass fraction of 10% for treatment, the treatment voltage is 60V, the treatment time is 10min, and the temperature is 80°C;

[0076] D. Place the foil after the solution treatment in step C in a boric acid solution with a mass fraction of 8%, and control the temperature to 85°C to perform the second-stage formation, the formation voltage is 320V, and the formation time is 12 minutes;

[0077] E. Dip the foil after the second-stage formation in step D into an aqueous solution of ethylenediaminetetraacetic ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
quality scoreaaaaaaaaaa
quality scoreaaaaaaaaaa
Login to View More

Abstract

The invention discloses a formation method for reducing the leakage current of an electrode foil. The formation method comprises pre-treatment, multi-stage formation treatment, solution treatment, high-temperature treatment and phosphoric acid depolarization treatment, wherein the solution treatment is respectively performed after each treatment of the first three-stage treatment in the multi-stage formation treatment is performed. According to the present invention, by treating with the specific solution (complexing reagent) after the three-stage formation, the specific solution (complexing reagent) is complexed with the aluminum ions of the hydrated alumina film to modify the hydrated alumina, such that the excessive formation of the hydrated alumina film can be inhibited; by applying the current under the acidic condition, the conversion of the hydrated alumina film to the compact porous alumina film is promoted so as to reduce the content of the hydrated alumina; and compared to the formation method in the prior art, the formation method of the present invention has the following advantages that the leakage current of the formed foil is reduced, the ripple current resistance ofthe electrode foil is improved, and the service life of the capacitor is prolonged.

Description

technical field [0001] The invention belongs to the technical field of manufacturing electrode foil materials for aluminum electrolytic capacitors, and in particular relates to a chemical formation method for reducing leakage current of electrode foils. [0002] technical background [0003] With the development of miniaturization of electronic equipment, there is an urgent need to reduce the volume and increase the specific capacity of aluminum electrolytic capacitors. As the core material in aluminum electrolytic capacitors, anodized foil plays a decisive role in various characteristics of the capacitor. The existing anodized foil formation process is generally water boiling, high-temperature heat treatment after four-stage formation, phosphoric acid treatment after five-stage formation, six-stage formation, seven-stage formation after the second high-temperature heat treatment, and finally ammonium dihydrogen phosphate solution Medium dipping treatment. After the electro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/08C25D11/12H01G9/04
CPCC25D11/08C25D11/12H01G9/04
Inventor 余英凤邓利松袁姚何凤荣
Owner YIDU DONGYANGGUANG FORMED FOIL