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High-specific-volume and high-strength medium-high-voltage corrosion electrode foil and preparation method and application thereof

A corrosion electrode, medium and high voltage technology, applied in the direction of circuits, capacitors, electrical components, etc., can solve the problem of inability to balance specific volume and bending performance, to ensure uniform pore diameter and pore density, uniform corrosion, and reduce the probability of occurrence Effect

Active Publication Date: 2020-12-22
RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects or deficiencies that the specific volume and bending performance of the medium and high voltage corrosion electrode foil in the prior art cannot be balanced, and provide a method for preparing a high specific volume and high strength medium and high voltage corrosion electrode foil

Method used

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  • High-specific-volume and high-strength medium-high-voltage corrosion electrode foil and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a method for preparing a medium-high voltage corroded electrode foil with high specific volume and high strength, which includes the following steps:

[0043] (1) Pretreatment: Put the aluminum foil in a sodium hydroxide solution with a concentration of 0.5% (mass concentration), take it out after dipping, and pickle it with the overflow waste liquid (containing hydrochloric acid) of the primary tank.

[0044] (2) First-level DC porosity corrosion: Put the pretreated aluminum foil into a mixture of sulfuric acid with a concentration of 30% (mass concentration) and hydrochloric acid with a concentration of 0.8% (mass concentration) (at a temperature of 70°C) Level DC porosity corrosion, the current density is 0.3A / cm 2 , the electricity is 40C / cm2 , the time is 65 seconds.

[0045] (3) Intermediate treatment: the above-mentioned aluminum foil corroded by first-level direct current electrolytic porosity was placed in a phosphoric acid solution wi...

Embodiment 2

[0051] This embodiment provides a method for preparing a medium-high voltage corroded electrode foil with high specific volume and high strength, which includes the following steps:

[0052] (1) Pretreatment: Put the aluminum foil in a sodium hydroxide solution with a concentration of 0.5% (mass concentration), take it out after dipping, and pickle it with the overflow waste liquid (containing hydrochloric acid) of the primary tank.

[0053] (2) First-level DC porosity corrosion: Put the pretreated aluminum foil into a mixture of sulfuric acid with a concentration of 20% (mass concentration) and hydrochloric acid with a concentration of 0.5% (mass concentration) (at a temperature of 65°C) Level DC porosity corrosion, the current density is 0.34A / cm 2 , the power is 41.6C / cm 2 , the time is 45 seconds.

[0054] (3) Intermediate treatment: the above-mentioned aluminum foil corroded by primary direct current electrolytic porosity was placed in a phosphoric acid solution with a ...

Embodiment 3

[0060] This embodiment provides a method for preparing a medium-high voltage corroded electrode foil with high specific volume and high strength, which includes the following steps:

[0061] (1) Pretreatment: Put the aluminum foil in a sodium hydroxide solution with a concentration of 0.5% (mass concentration), take it out after dipping, and pickle it with the overflow waste liquid (containing hydrochloric acid) of the primary tank.

[0062] (2) First-level DC porosity corrosion: Put the pretreated aluminum foil into a mixture of sulfuric acid with a concentration of 40% (mass concentration) and hydrochloric acid with a concentration of 1% (mass concentration) (at a temperature of 75°C) Level DC porosity corrosion, the current density is 0.0285A / cm 2 , the power is 39.4C / cm 2 , the time is 90 seconds.

[0063] (3) Intermediate treatment: place the above-mentioned aluminum foil corroded by primary direct current electrolytic porosity in a phosphoric acid solution with a conce...

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Abstract

The invention relates to a high-specific-volume and high-strength medium-high-voltage corrosion electrode foil and a preparation method and application thereof. The preparation method comprises the steps of pretreatment, first-stage direct-current electrolytic corrosion, intermediate treatment 1, second-stage direct-current electrolytic corrosion, intermediate treatment 2, third-stage direct-current corrosion, post-treatment and the like, so that the medium-high voltage corrosion electrode foil is obtained. The medium-high pressure corrosion foil prepared by adopting the method is high in specific volume, good in bending strength, uniform in aluminum surface corrosion and high in consistency.

Description

technical field [0001] The invention belongs to the field of medium and high voltage electrode foils, and in particular relates to a medium and high voltage corrosion electrode foil with high specific volume and high strength, its preparation method and application. Background technique [0002] Medium and high voltage anode electronic aluminum foil is a high-end product of aluminum foil, which is widely used in aluminum electrolytic capacitors of electronic components. At present, with the development of electronic products in the direction of miniaturization and integration, higher requirements are placed on the performance of aluminum electrolytic capacitors: that is, the volume should be reduced as much as possible under the premise of ensuring various electrical properties. Therefore, the research and development of miniaturization of aluminum electrolytic capacitors, that is, to achieve higher unit electrostatic capacitance (specific capacitance), is not only the key t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055C25F3/04
CPCH01G9/055C25F3/04
Inventor 曾森时王春华罗向军汪启桥肖远龙吕根品
Owner RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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