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Formation method suitable for production of small wide electrode foils

A formation method and electrode foil technology, applied in circuits, capacitors, electrical components, etc., can solve the problems of low bending strength, large leakage current, large leakage current, etc., and achieve the effect of improving formation efficiency, service life and quality.

Active Publication Date: 2020-01-24
南通南辉电子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrode foil prepared by the chemical formation process of the existing electrode foil has low specific volume, low bending strength and large leakage current

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A chemical formation method suitable for the production of small-piece wide electrode foils, comprising the following steps:

[0021] S1, to 0.5mol / L HCl and AlCl 3 Add a surfactant to the mixed solution, then stir while heating, and carry out surface treatment on the aluminum foil at a temperature of 35°C;

[0022] S2. Repeatedly rinse with distilled water, soak the aluminum foil in an aqueous NaOH solution with a temperature of 30°C and a concentration of 2.0mol / L for 3 minutes, and then rinse with distilled water repeatedly;

[0023] S3. The aluminum foil is soaked in deionized water at 92°C for 15 minutes, and the aluminum foil is placed in an aqueous solution mixed with 0.2% oxalic acid and 3.5% ammonium adipate. 2 Under the condition of electric current, it was formed for 150s, and the first-level formed electrode foil was obtained;

[0024] S4. Place the first-grade electrode foil in a mixed aqueous solution of 5% boric acid, 0.5% oxalic acid, and 0.1% ammonium...

Embodiment 2

[0033] A chemical formation method suitable for the production of small-piece wide electrode foils, comprising the following steps:

[0034] S1, to 1mol / L HCl and AlCl 3 Add a surfactant to the mixed solution, then heat and stir, and perform surface treatment on the aluminum foil at a temperature of 50°C;

[0035] S2. Repeatedly rinse with distilled water, soak the aluminum foil in NaOH aqueous solution with a temperature of 30°C and a concentration of 2.5mol / L for 2 minutes, and then rinse with distilled water repeatedly;

[0036] S3. The aluminum foil is soaked in deionized water at 100°C for 30 minutes, and the aluminum foil is placed in an aqueous solution mixed with 1.0% oxalic acid and 4% ammonium adipate. 2 Formation under the condition of current for 200s, to obtain a first-level chemical formation electrode foil;

[0037] S4. Place the first-grade electrode foil in a mixed aqueous solution with a concentration of 5% boric acid, 0.8% oxalic acid and 0.6% ammonium pen...

Embodiment 3

[0046] A chemical formation method suitable for the production of small-piece wide electrode foils, comprising the following steps:

[0047] S1, to 1.5mol / L HCl and AlCl 3 Add a surfactant to the mixed solution, then heat and stir, and perform surface treatment on the aluminum foil at a temperature of 50°C;

[0048] S2. Repeatedly rinse with distilled water, soak the aluminum foil in NaOH aqueous solution with a temperature of 30°C and a concentration of 2.8mol / L for 3 minutes, and then rinse with distilled water repeatedly;

[0049] S3. The aluminum foil is soaked in deionized water at 100°C for 20 minutes, and the aluminum foil is placed in an aqueous solution mixed with 1.0% oxalic acid and 6% ammonium adipate. 2 Formation under the condition of current for 200s, to obtain a first-level chemical formation electrode foil;

[0050] S4. Place the first-grade electrode foil in an aqueous solution with a concentration of 8% boric acid, 0.6% oxalic acid and 0.8% ammonium pentab...

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Abstract

The invention discloses a formation method suitable for small wide electrode foil production. The formation method comprises the following steps that: S1, a surfactant is added into a 1.5 mol / L HCl and AlCl3 mixed solution, an obtained mixture is heated when being stirred, and surface treatment is carried out on an aluminum foil at 50 DEG C; S3, the aluminum foil is soaked in deionized water at the temperature of 100 DEG C for 20 minutes, the aluminum foil is putted in an aqueous solution formed by mixing oxalic acid with the concentration of 1.0% and ammonium adipate with the concentration of6%, and formation is carried put for 200 seconds under the conditions of 95 DEG C temperature, 220V voltage and 100mA / cm <2> current, so that a primary formed electrode foil is obtained; and S4, theprimary formed electrode foil is putted into an aqueous solution formed by mixing boric acid with the concentration of 8%, oxalic acid with the concentration of 0.6% and ammonium pentaborate with theconcentration of 0.8%, and formation is carried out for 180s under the conditions of 85 DEG C temperature, 240V voltage and 0.22 A / cm<2> treatment current density, so that a secondary formed electrodefoil is obtained. A compact oxidation film is formed on the aluminum foil, so that the service life of the aluminum foil is prolonged; a multi-stage formation process is adopted, so that the preparedelectrode foil has excellent performance and low electric leakage, and the quality of the electrode foil is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical formation for electrode foil production, and more specifically relates to a chemical formation method suitable for the production of small and wide electrode foils. Background technique [0002] Electrode foil is a key raw material for the manufacture of aluminum electrolytic capacitors. Due to the rapid development of the electronics industry, especially the rapid expansion of the market for complete machine products such as communication products, computers, and home appliances, it has played a role in fueling the development of the aluminum electrode foil industry. The electrode foil prepared by the chemical formation process of the existing electrode foil has low specific volume, low bending strength and large leakage current. Contents of the invention [0003] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a chemical formation method suitab...

Claims

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Application Information

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IPC IPC(8): H01G9/00H01G9/055
CPCH01G9/0029H01G9/055
Inventor 李晓天陈小兵包志刚
Owner 南通南辉电子材料股份有限公司
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