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Method for preparing electrode aluminum foil for high capacity aluminum electrolytic capacitor

An aluminum electrolytic capacitor, high-capacity technology, applied in the field of non-traditional processing technology and equipment, can solve the problems of small capacitance, low versatility, complex process, etc., to reduce the use of strong acid and alkali, strong controllability, The effect of simple operation process

Inactive Publication Date: 2018-10-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art such as complex process, low versatility, and small capacitance, and to provide a method for preparing electrode foil for high-capacity aluminum electrolytic capacitors. Scale up the real surface area of ​​the metal, thereby increasing the capacity of the capacitor fabricated from this electrode foil

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  • Method for preparing electrode aluminum foil for high capacity aluminum electrolytic capacitor
  • Method for preparing electrode aluminum foil for high capacity aluminum electrolytic capacitor

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preparation example Construction

[0024] The invention relates to a method for preparing aluminum foil for high-capacity aluminum electrolytic capacitors. The micro / nano composite structure is constructed by performing electrochemical etching and anodic oxidation on the surface of the aluminum foil, which can increase the surface area of ​​the electrode aluminum foil and further increase the capacitance of the aluminum electrolytic capacitor.

[0025] (1) Before the electrochemical processing of the electronic aluminum foil, the surface of the aluminum foil is smoothed, polished, cleaned, and degreased.

[0026] (2) Fix the pretreated aluminum foil on the attached figure 2 In the jig 4, the jig 4 is placed in the container 2 with the electrolyte, the base 6 is used to drive the stirrer 1 to stir the solution evenly, and the electrode 5 is connected to the power source 3 for electrochemical etching.

[0027] (3) Fix the aluminum foil after electrochemical etching on the attached figure 2 In the jig 4, the ji...

Embodiment 1

[0028] Embodiment 1: prepare the electrode aluminum foil of high-capacity aluminum electrolytic capacitor, specific method is as follows:

[0029] (1) Clean the 30mm×40mm aluminum foil with absolute ethanol to remove oil, then use 800# and 1500# sandpaper to polish the surface of the aluminum foil to remove the surface oxide layer and impurities, then use deionized water to ultrasonically clean it, and blow it dry with a hair dryer ;

[0030] (2) Use the cleaned aluminum foil surface and the graphite plate with the same size as the anode and cathode, respectively, and perform electrochemical processing in constant current mode to build a micron-scale structure. After processing, use deionized water to ultrasonically clean it. The concentration of sodium is 0.1mol / L, and the current density is 500mA / cm 2 , the processing time is 30s, the distance between the pole plates is 10mm, and the accompanying magnetic stirring speed is 400r / min during the processing;

[0031] (3) The s...

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Abstract

The invention belongs to the technical field of non-traditional processing technologies and equipment, and provides a method for preparing an electrode aluminum foil for a high capacity aluminum electrolytic capacitor. The method comprises the steps as follows: (1) cleaning and degreasing the aluminum foil, then performing polishing, then performing ultrasonic cleaning with ionized water, and blow-drying; (2) placing the cleaned aluminum foil surface and a conductive material of the same size as the anode and cathode in a neutral electrolyte for conducting electrochemical processing in a constant current mode, to construct a micron-sized structure; and (3) placing the micron-sized structure surface in an acidic solution, constructing a nanostructure thereon by anodization, cleaning and drying, and thus obtaining an aluminum foil surface of the high capacity aluminum electrolytic capacitor. The method for preparing the electrode aluminum foil can improve the surface area of the aluminumfoil at the nanometer scale, has the advantages of high environmental friendliness, simple operation process and high versatility, and can be used for improving the capacity of the aluminum electrolytic capacitor.

Description

technical field [0001] The invention relates to a preparation method of an electrode aluminum foil for a high-capacity aluminum electrolytic capacitor, which can increase the capacitance of the capacitor aluminum foil by increasing the real surface area of ​​the aluminum foil, and belongs to the field of non-traditional processing technology and equipment technology. Background technique [0002] An electrolytic capacitor refers to a capacitor that uses a metal as the anode, a dense metal oxide film on the surface as the dielectric, and an electrolyte solution as the cathode. The electrolytic capacitor prepared by the above method can be widely used in the fields of communication, industry, military affairs, life and the like. With the development of science and technology, electrolytic capacitors have a larger market, but at the same time they are also facing new challenges. When electrolytic capacitors are used in highly integrated electronic circuits, it is necessary to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/045H01G9/00
CPCH01G9/045H01G9/0029
Inventor 孙晶卜凡松黄柳刘新宋金龙
Owner DALIAN UNIV OF TECH