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Cleaning method of electronic energy storage materials

An energy storage material and electronic technology, applied in the direction of circuits, capacitors, electrical components, etc., can solve the problem of ineffective reduction of aluminum powder on the surface of corroded foil and particle powder impurities in the cavity, unstable riveting of front and rear rolls, and shortening of foil boost Time and other issues, to achieve the effect of shortening mechanical properties, reducing foil breakage, and improving electrostatic capacity

Active Publication Date: 2015-12-30
新疆广投桂东电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a post-treatment method of anode foil for aluminum electrolytic capacitors, which can solve the technical problem that the existing technology cannot effectively reduce the aluminum powder on the surface of the corroded foil and the particle powder impurities in the cavity, and can improve the anode aluminum foil. Electrostatic capacity can effectively solve the problem of unstable riveting of front and rear rolls during chemical formation and energy production while reducing the corrosion of powder on the surface of the foil, and shorten the boosting time of the foil

Method used

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  • Cleaning method of electronic energy storage materials

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. Preparation of raw material aluminum foil: select the aluminum foil prepared by vacuum annealing at 550°C for 1 hour as the raw material, the cubic texture is ≧96%, and the thickness is 116 μm; the chemical composition of the raw material aluminum foil is shown in Table 1.

[0028] The chemical composition of table 1 raw material aluminum foil (mass fraction, %)

[0029]

[0030] Two, adopt the method of the present invention to prepare corroded foil, comprise the following steps:

[0031] (1) Pretreatment: first soak the raw material aluminum foil in a 0.7mol / L sodium hydroxide solution at a temperature of 50°C for 100s, and then place it in a mixed solution containing 5wt% hydrochloric acid and 0.8wt% oxalic acid at a temperature of 70°C Soak for 100s, and finally wash with pure water;

[0032] (2) Electrochemical porosity corrosion: place the pretreated aluminum foil in a mixed solution containing 22wt% sulfuric acid, 4wt% nitric acid and 0.9wt% aluminum ions ...

Embodiment 2

[0040] 1. Preparation of raw material aluminum foil: select the aluminum foil prepared by vacuum annealing at 530°C for 1.5h as the raw material, the cubic texture is ≧95%, and the thickness is 110 μm; the chemical composition of the raw material aluminum foil is shown in Table 2.

[0041] The chemical composition of table 2 raw material aluminum foil (mass fraction, %)

[0042]

[0043] Two, adopt the method of the present invention to prepare corroded foil, comprise the following steps:

[0044] (1) Pretreatment: first soak the raw material aluminum foil in a 0.8mol / L sodium hydroxide solution at a temperature of 60°C for 50s, and then place it in a mixed solution containing 6wt% hydrochloric acid and 1.5wt% oxalic acid at a temperature of 60°C Soak for 150s, and finally wash with pure water;

[0045] (2) Electrochemical porosity corrosion: place the pretreated aluminum foil in a mixed solution containing 30wt% sulfuric acid, 6wt% nitric acid and 1.2wt% aluminum ions for...

Embodiment 3

[0053] 1. Preparation of raw material aluminum foil: select the aluminum foil prepared by vacuum annealing at 580°C for 0.5h as the raw material, with a cubic texture ≥ 95% and a thickness of 120 μm; the chemical composition of the raw material aluminum foil is shown in Table 3.

[0054] The chemical composition of table 3 raw material aluminum foil (mass fraction, %)

[0055]

[0056] Two, adopt the method of the present invention to prepare corroded foil, comprise the following steps:

[0057] (1) Pre-treatment: First soak the raw material aluminum foil in a 0.6mol / L sodium hydroxide solution at a temperature of 40°C for 150s, and then soak it in a mixed solution containing 2wt% hydrochloric acid and 1wt% oxalic acid at a temperature of 80°C 50s, and finally wash with pure water;

[0058] (2) Electrochemical porosity corrosion: place the pretreated aluminum foil in a mixed solution containing 15wt% sulfuric acid, 6wt% nitric acid and 0.6wt% aluminum ions for direct curre...

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Abstract

The invention discloses a cleaning method of electronic energy storage materials. The electronic energy storage materials are anode foils for aluminum electrolytic capacitors, the cleaning method is a technological process for conducting cleaning treatment on the aluminum foils which are subjected to pretreatment, electrochemical hole corrosion, intermediate treatment and electrochemical reaming corrosion, and the cleaning treatment comprises first-time cleaning treatment, second-time cleaning treatment and third-time cleaning treatment. According to the cleaning method of the electronic energy storage materials, electrical properties of the corrosion foils for the aluminum electrolytic capacitors are effectively improved by introducing the ultrasonic cleaning effect and improving the formula of cleaning fluid and the cleaning technology. Compared with the prior art, the electrostatic capacity of the anode corrosion foils produced through the cleaning method of the electronic energy storage materials is increased by 4.91%-5.95%, the voltage rising time of formed foils is shortened by 2-10 s, and meanwhile the problem that riveting of a front roll and a back roll is not stable during formation production is effectively solved.

Description

technical field [0001] The invention relates to a cleaning method for electronic energy storage materials, in particular to a cleaning method for an anode foil used in an aluminum electrolytic capacitor in a corrosion process. Background technique [0002] The corrosion production process of anode foil for aluminum electrolytic capacitors generally includes the following steps: pre-treatment of the light foil, primary hole corrosion, secondary hole expansion corrosion, post-treatment (cleaning), drying, and foil corrosion. In order to expand their effective specific surface area and increase the electrostatic capacity (specific capacity) per unit area, major production companies have made great improvements to the process, such as improving the process formula of pre-treatment, the formula of corrosion solution and the number of poles for electrochemical corrosion, and the number of electrodes produced. The time ratio between hole opening and hole expansion has been greatly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/04C25F3/14C23G1/12H01G9/055H01G9/045
Inventor 杨小飞张传超蔡小宇陆雅军
Owner 新疆广投桂东电子科技有限公司
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