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Method for electrolytic-depositing dispersed zinc crystal nucleuses on surface of medium-high voltage electronic aluminum foil

A technology for electronic aluminum foil and zinc crystal nucleus, which is applied in the field of electrodepositing and dispersing zinc crystal nucleus on the surface of medium and high voltage aluminum foil to achieve the effects of reducing difficulty, improving quality, improving utilization rate and mechanical properties

Active Publication Date: 2014-05-07
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

However, during this annealing process, the oxide film on the surface of the aluminum foil becomes denser, which becomes an obstacle for subsequent electrolytic corrosion pores.

Method used

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  • Method for electrolytic-depositing dispersed zinc crystal nucleuses on surface of medium-high voltage electronic aluminum foil

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Experimental program
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Effect test

Embodiment 1

[0021] The purity is 99.99%, the thickness is 110 μm, and the cubic texture occupancy rate is greater than 95%, and the surface is not enriched with Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, Pb these medium-high-pressure high-purity aluminum foils with higher electrode potential than aluminum are boiled in boiling water at 95°C for 30 seconds, and a new water-containing film is formed on the surface of the aluminum foil. Put the above-mentioned aluminum foil in the electrolytic solution for electrodeposition zinc crystal nucleus treatment, the composition of the electrolytic solution is: 0.3mol / L zinc oxide + 0.1mol / L sodium hydroxide; graphite is used as the anode, and the above-mentioned boiled surface is used to form A medium-high voltage aluminum foil with a new water-containing film is used as the cathode, and the aluminum foil is charged into the electrolyte, where the temperature of the electrolyte is 40°C, and the current density of the electrodeposition is 25mA / cm 2...

Embodiment 2

[0024] The purity is 99.99%, the thickness is 110 μm, and the cubic texture occupancy rate is greater than 95%, and the surface is not enriched with Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, Pb these medium-high-pressure high-purity aluminum foils whose electrode potential is higher than that of aluminum are placed in an alkaline solution with a temperature of 60 °C and a concentration of 1 mol / L for 15 seconds, after a new water-containing film is formed on the surface of the aluminum foil. Put the above-mentioned aluminum foil in the electrolytic solution for electrodeposition zinc crystal nucleus treatment, the composition of the electrolytic solution is: 0.3mol / L zinc oxide + 0.1mol / L sodium hydroxide; graphite is used as the anode, and the above-mentioned boiled surface is used to form A medium-high voltage aluminum foil with a new water-containing film is used as the cathode, and the aluminum foil is charged into the electrolyte, where the temperature of the electrolyte...

Embodiment 3

[0027] The purity is 99.99%, the thickness is 110 μm, and the cubic texture occupancy rate is greater than 95%, and the surface is not enriched with Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn, Pb these medium-high-pressure high-purity aluminum foils with higher electrode potential than aluminum are placed in a phosphoric acid solution with a concentration of 0.5mol / L at 60°C for 30-60 seconds, and a new water-containing film is formed on the surface of the aluminum foil. Put the above-mentioned aluminum foil in the electrolytic solution for electrodeposition zinc crystal nucleus treatment, the composition of the electrolytic solution is: 0.3mol / L zinc oxide + 0.1mol / L sodium hydroxide; graphite is used as the anode, and the above-mentioned boiled surface is used to form A medium-high voltage aluminum foil with a new water-containing film is used as the cathode, and the aluminum foil is charged into the electrolyte, where the temperature of the electrolyte is 40°C, and the curre...

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Abstract

The invention relates to a method for electrolytic-depositing dispersed zinc crystal nucleuses on the surface of a medium-high voltage electronic aluminum foil. The method comprises the following steps: after performing homogenizing annealing, forming a medium-high voltage high-purity aluminum foil, wherein a [100] structure occupancy of the medium-high voltage high-purity aluminum foil is more than 95 percent, elements of Mn, Fe, Co, Ni, Cu, Zn, Cd, Ga, Ge, In, Sn and Pb electrode potentials of which are higher than that of aluminum are not enriched on the surface of the medium-high voltage high-purity aluminum foil; pretreating to remove an oxidation film on the surface, and simultaneously forming a new water-containing film; and then depositing dispersed zinc crystal nucleuses on the surface of the aluminum foil in an electrolyte by adopting quick electrochemical deposition. The medium-high voltage electronic aluminum foil deposited with the dispersed zinc crystal nucleuses on the surface is adopted, pit etching of the aluminum foil can be effectively guided by the zinc crystal nucleuses during electrolytic corrosion, the uniformity of the distribution of tunnel holes is improved, and the self-corrosion thinning of the aluminum foil is reduced, thus the specific capacitance and bending resistance performance of the aluminum foil can be remarkably improved.

Description

technical field [0001] The invention relates to the field of manufacturing medium and high voltage anode aluminum foils and corroded foils for aluminum electrolytic capacitors, in particular to a method for electrodepositing dispersed zinc nuclei on the surface of medium and high voltage aluminum foils. Background technique [0002] With the continuous development of electronic products, medium and high voltage aluminum electrolytic capacitors as basic components are bound to have the characteristics of high capacity and miniaturization to meet the development needs of electronic products. The anode aluminum foil used in medium and high voltage aluminum electrolytic capacitors generally generates a large number of tunnel holes on the surface of the aluminum foil by electrochemical corrosion to expand its surface area, thereby increasing the specific capacitance. In order to ensure that the medium and high voltage electrode aluminum foil has the required winding performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/06C25D5/44C25D3/22
Inventor 何业东彭宁梁力勃宋洪洲杨小飞蔡小宇熊传勇
Owner 新疆广投桂东电子科技有限公司
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