Processing method for improving water resistance of low-voltage electrode foil, and application

A low-voltage electrode and processing method technology, applied in circuits, capacitors, electrical components, etc., can solve the problems of low production efficiency of low-voltage electrode foils, and achieve the effects of improving water resistance, prolonging storage time and capacitor life, and improving production efficiency.

Inactive Publication Date: 2018-06-01
FOSHAN UNIVERSITY
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The manufacturing method of the low-voltage electrode foil disclosed in the prior art has low production efficiency, and there is room for further improvement in the water resistance of the product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Processing method for improving water resistance of low-voltage electrode foil, and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Take corroded aluminum foil with a purity of 99.9%, place the aluminum foil in an aqueous solution of azelaic acid and sodium azelate with a mass ratio of 1%, at 55°C, and a current density of 50mA / cm 2 1. Under the condition of voltage of 45V, it is formed for 4 minutes, and then taken out for the first water washing;

[0029] 2. Put the aluminum foil after the first water washing into 0.3% propyl titanate aqueous solution by mass ratio, and take it out after immersing at room temperature for 1 minute; place the aluminum foil impregnated in the propyl titanate aqueous solution in In an aqueous solution of azelaic acid and azelaic acid salt with a mass ratio of 0.5%, at 70°C and a current density of 50mA / cm 2 1. Under the condition of voltage of 50V, it is formed for 2 minutes, then taken out and washed with water for the second time;

[0030] 3. Put the aluminum foil washed for the second time into 9% phosphoric acid aqueous solution at a temperature of 30°C for 2 ...

Embodiment 2

[0032] 1. Take the corroded aluminum foil with a purity of 99.9%, and place the aluminum foil in an aqueous solution of azelaic acid and sodium azelate with a mass ratio of 1.5%, at 58°C and a current density of 50mA / cm 2 1. Under the condition of voltage of 47V, it is formed for 7 minutes, and then taken out for the first water washing;

[0033] 2. Put the aluminum foil washed for the first time into 0.5% propyl titanate aqueous solution by mass ratio, soak it at room temperature for 1.5 minutes and then take it out; put the aluminum foil dipped in the propyl titanate aqueous solution in In an aqueous solution of azelaic acid and azelaic acid salt with a mass ratio of 0.8%, at 72°C and a current density of 50mA / cm 2 1. Under the condition of voltage of 51V, it is formed for 2 minutes, then taken out and washed with water for the second time;

[0034] 3. Put the aluminum foil washed for the second time into an aqueous phosphoric acid solution with a mass percentage of 9.2%, c...

Embodiment 3

[0036] 1. Take corroded aluminum foil with a purity of 99.9%, place the aluminum foil in an aqueous solution of azelaic acid and sodium azelate with a mass ratio of 2%, at 60°C, and a current density of 50mA / cm 2 1. Under the condition of voltage of 46V, it is formed for 10 minutes, and then taken out for the first water washing;

[0037] 2. Put the aluminum foil after the first water washing into 1% propyl titanate aqueous solution by mass ratio, and take it out after immersing at room temperature for 1.5 minutes; put the aluminum foil dipped in the propyl titanate aqueous solution in In an aqueous solution of azelaic acid and azelaic acid salt with a mass ratio of 1.0%, at 75°C and a current density of 50mA / cm 2 1. Under the condition of voltage of 52V, it is formed for 3 minutes, and then taken out for the second washing;

[0038] 3. Put the aluminum foil washed for the second time into a phosphoric acid aqueous solution with a mass percentage of 9.5%, passivate it at a te...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of manufacturing of aluminum electrolytic capacitors, and discloses a processing method for improving water resistance of low-voltage electrode foil, and an application. The processing method comprises the steps of placing corroded aluminum foil in an aqueous solution of azelaic acid and azelate, performing formation and water washing on the aluminum foil and then placing the aluminum foil into a titanium n-propoxide aqueous solution for soaking, placing the aluminum foil into an aqueous solution of azelaic acid and azelate, performing formation andwater washing on the aluminum foil and then placing the aluminum foil into a phosphoric acid aqueous solution, performing passivation treatment on the aluminum foil at a temperature of 30-45 DEG C, then performing heat treatment on the aluminum foil at a temperature of 400-600 DEG C, performing water washing on the aluminum foil and then placing the washed aluminum foil in a titanium phosphate aqueous solution, and performing formation and water washing on the aluminum foil and drying the aluminum foil to obtain the low-voltage electrode foil. The electrode foil prepared by adopting the processing method has the advantages of significantly increased water resistance, prolonged storage time, shortened formation time and high production efficiency, and the low-voltage electrode foil is mainly used in the manufacturing field of aluminum electrolytic capacitors.

Description

technical field [0001] The invention belongs to the technical field of manufacturing aluminum electrolytic capacitors, and more specifically relates to a treatment method and application for improving the water resistance of low-voltage electrode foils. Background technique [0002] At present, the domestic production of low-voltage electrode foil adopts three-stage chemical formation and four-stage chemical formation process, and the produced low-voltage electrode foil has poor water resistance and unstable storage performance. [0003] Chinese patent application CN200810043406.2 discloses a manufacturing method for improving the water resistance of low-voltage electrode foil, including the following steps: 1) primary chemical formation; 2) secondary chemical formation; 3) intermediate treatment; 4) high temperature treatment; 5) post-chemical formation 1; 6) Phosphorus treatment; 7) Post-formation 2; 8) Phosphorus treatment. [0004] Chinese patent application CN201310178...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055H01G13/06
CPCH01G9/055H01G13/06
Inventor 杨富国杨飞张玉红关共凑
Owner FOSHAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap