Formation method of high-specific-volume, high-flexibility and low-electric-leakage electrode foil

A chemical formation method and low leakage technology, applied in circuits, capacitors, electrolytic capacitors, etc., can solve the problems of low electrode foil specific volume, low bending strength, high current density, etc. High volume effect

Inactive Publication Date: 2017-10-24
新疆金泰新材料技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this manufacturing method of electrode foil, the process requires high current density, high energy consumption, and low production effi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high specific volume, high bending, low leakage electrode foil formation method, the specific implementation steps are as follows:

[0021] (1) Pretreatment: Put the corroded aluminum foil with a purity of 99.99wt% in pure water at a temperature of 97°C for 12 minutes, then depolarize the aluminum foil in 5wt% fumaric acid aqueous solution, fumaric acid The temperature of the acid solution is 85°C;

[0022] (2) Primary formation: immerse the pretreated aluminum foil in an aqueous solution containing 1wt% azelaic acid and 5wt% ammonium azelate at 85°C and 10mA / cm 2 , 6min under 120V condition;

[0023] (3) Secondary formation: the aluminum foil after the primary formation is immersed in an aqueous solution containing 1wt% azelaic acid, 3wt% ammonium azelate and 3wt% boric acid, at 85°C, 10mA / cm 2 , 250V conditions into 6min;

[0024] (4) Tertiary formation: the aluminum foil after the secondary formation is immersed in an aqueous solution containing 3wt% citric acid...

Embodiment 2

[0030] A high specific volume, high bending, low leakage electrode foil formation method, the specific implementation steps are as follows:

[0031] (1) Pretreatment: put the corroded aluminum foil with a purity of 99.99wt% in pure water at a temperature of 98°C for 9 minutes, then depolarize the aluminum foil in 1wt% fumaric acid aqueous solution, fumaric acid The temperature of the acid solution is 83°C;

[0032] (2) Primary formation: immerse the pretreated aluminum foil in an aqueous solution containing 2wt% azelaic acid and 2wt% ammonium azelate at 86°C, 8mA / cm 2 , 6min under 120V condition;

[0033] (3) Secondary formation: the aluminum foil after the primary formation is immersed in an aqueous solution containing 2wt% azelaic acid, 1.5wt% ammonium azelate and 1wt% boric acid, at 86°C, 8mA / cm 2 , 250V conditions into 6min;

[0034] (4) Tertiary formation: the aluminum foil after the secondary formation is immersed in an aqueous solution containing 1wt% citric acid, 3w...

Embodiment 3

[0040] A high specific volume, high bending, low leakage electrode foil formation method, the specific implementation steps are as follows:

[0041] (1) Pretreatment: Put the corroded aluminum foil with a purity of 99.99wt% in pure water at a temperature of 98°C for 10 minutes, and then depolarize the aluminum foil in 4wt% fumaric acid aqueous solution. The temperature of the acid solution is 84°C;

[0042] (2) Primary formation: immerse the pretreated aluminum foil in an aqueous solution containing 2wt% azelaic acid and 3wt% ammonium azelate at 86°C and 9mA / cm 2 , 6min under 120V condition;

[0043] (3) Secondary formation: the aluminum foil after the primary formation is immersed in an aqueous solution containing 2wt% azelaic acid, 2wt% ammonium azelate and 2wt% boric acid, at 86°C, 9mA / cm 2 , 250V conditions into 6min;

[0044] (4) Tertiary formation: the aluminum foil after the secondary formation is immersed in an aqueous solution containing 2wt% citric acid, 2wt% ammo...

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Abstract

The invention discloses a formation method of a high-specific-volume, high-flexibility and low-electric-leakage electrode foil. The formation method comprises first-grade formation, second-grade formation, third-grade formation, fourth-grade formation and fifth-grade formation of an aluminum foil, wherein the first-grade formation of the aluminum foil is performed in water solution containing azelaic acid and ammonium azelaic acid; the second-grade formation is performed in water solution containing azelaic acid, ammonium azelaic acid and boric acid; the third-grade formation is performed in water solution containing lemons, boric acid and ammonium azelaic acid; and the fourth-grade formation and the fifth-grade formation are both performed in water solution containing boric acid and ammonium pentaborate. The electrode foil manufactured by using the method is high in specific volume, high in bending strength and low in electric leakage; and the quality of the electrode foil is effectively improved.

Description

technical field [0001] The invention belongs to the field of electrode foil production, and in particular relates to a method for forming an electrode foil with high specific volume, high bending and low leakage current. Background technique [0002] The current manufacturing method of the electrode foil for medium and high voltage aluminum electrolytic capacitors is as follows: immerse the corroded aluminum foil with a purity of 99.99wt% in pure water at 95-100°C for 10 minutes; take it out and place it in 0.1 In the aqueous solution of the azelaic acid of wt% and the ammonium azelate of 2wt%, under the conditions of 85 ℃, current density of 20mA / cm2, and voltage of 200v, the first-order formation is 18min; then placed in 7wt% of boric acid and 0.4 In the aqueous solution of wt% ammonium pentaborate, under the conditions of 85°C, current density of 20mA / cm2, and voltage of 430v, secondary conversion was performed for 18min; then placed in the aqueous solution of 7wt% boric ...

Claims

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Application Information

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IPC IPC(8): C25D11/12H01G9/055
CPCC25D11/12H01G9/055
Inventor 严民陈宇峰
Owner 新疆金泰新材料技术股份有限公司
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