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Production process of negative electrode foil, negative electrode foil and polymer solid aluminum electrolytic capacitor

A production process and negative electrode technology, which is applied in the field of polymer solid aluminum electrolytic capacitors, can solve the problems of poor safety and economy, and the inability to realize miniaturization of capacitors, etc., to achieve smaller volume, smaller ESR value, and lower ESR value Effect

Active Publication Date: 2019-05-31
安徽纳诺箔材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned electrode structure increases the specific capacity of the electrode by attaching the dielectric particle layer of the valve metal to the aluminum foil, the dielectric particles are closely bonded to the aluminum foil through the carbide of aluminum, and it is necessary to heat it in a space containing hydrocarbon substances. Both safety and economy are not good. At the same time, the larger the specific volume, the thicker the dielectric particle layer is, and it is obviously impossible to realize the miniaturization problem of the same capacity of the capacitor.

Method used

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  • Production process of negative electrode foil, negative electrode foil and polymer solid aluminum electrolytic capacitor
  • Production process of negative electrode foil, negative electrode foil and polymer solid aluminum electrolytic capacitor
  • Production process of negative electrode foil, negative electrode foil and polymer solid aluminum electrolytic capacitor

Examples

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Embodiment 1

[0041] see figure 1 and figure 2 As shown, this embodiment provides a negative electrode foil, which includes an aluminum substrate 1 and a dielectric layer 2 formed on the surface of the aluminum substrate 1 .

[0042] Specifically, the negative electrode foil production process is as follows:

[0043] S1. Select an aluminum base material, which uses aluminum foil with an aluminum content of 99.5% and a thickness of 30 μm as the aluminum base material;

[0044] S2. The process of forming a dielectric layer, which includes the following steps: a), preparing slurry; b), first etching the surface of the aluminum substrate to form holes, and then coating the slurry on the surface of the aluminum substrate with holes, And the surface is dried, and then sent to the rolling machine, the coating is pressed into the hole and compacted on the hole and the surface of the aluminum substrate; c), carbonization treatment.

[0045] In step a), the valve metal oxide dielectric particles,...

Embodiment 2

[0058] The structure and process of the negative electrode foil involved in this implementation are basically the same as those in Example 1, except that:

[0059] 1) The formation process of the pores in this example is: soak the selected aluminum substrate in a hydrochloric acid solution with a concentration of 0.5mol / L and a temperature of 80°C for 15s, then wash it with a 3wt% nitric acid aqueous solution, and then use Rinse with water and dry.

[0060] Specifically, the diameter of the holes 10 is 150-250 nm, the depth of the holes is 450-550 nm, and the distribution density of the holes on the surface of the aluminum substrate 1 is 1×10 4 piece / cm 2 .

[0061] ), in this example, titanium dioxide particles, silver particles, organic resin, dispersant and solvent are mixed according to the mass ratio of 1:0.10:0.6:0.0002:8, stirred and mixed to make a slurry.

[0062] ), in this example, the slurry coating coated on the surface of the aluminum substrate is dried for 50...

Embodiment 3

[0067] The structure and process of the negative electrode foil involved in this implementation are basically the same as those in Example 1, except that:

[0068] 1) The formation process of the pores in this example is: put the selected aluminum substrate into the hydrochloric acid solution with a concentration of 1mol / L and a temperature of 80°C for 20s, then wash it with 3wt% nitric acid aqueous solution, and then wash it with clean water Rinse and dry.

[0069] Specifically, the diameter of the holes 10 is 250-300 nm, the depth of the holes is 600-700 nm, and the distribution density of the holes on the surface of the aluminum substrate 1 is 4×10 5 piece / cm 2 .

[0070] ), in this example, titanium dioxide particles, silver particles, organic resin, dispersant and solvent are mixed according to the mass ratio of 1:0.2:0.6:0.0002:8, stirred and mixed to make a slurry.

[0071]), in this example, the slurry coating coated on the surface of the aluminum substrate is dried...

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Abstract

The invention relates to a production process of a negative electrode foil, a negative electrode foil and a polymer solid aluminum electrolytic capacitor. The production process of the negative electrode foil comprises the following steps of S1, selecting an aluminum substrate; and S2, a process of forming a dielectric layer, comprising the following steps of a) preparing a paste; b) etching the surface of the aluminum substrate to form a hole, coating the surface of the aluminum substrate having the hole with the paste, drying the surface, feeding aluminum substrate to a rolling mill, pressing a coating into the hole and compacting the coating on the surface of the hole and the aluminum substrate; and c), performing a carbonization treatment. On the premise of increasing the specific volume, the negative electrode foil having the same specific volume is significantly thinner. The polymer solid aluminum electrolytic capacitor produced by the negative electrode foil is significantly smaller in size and lower in ESR value among the products having the same capacity. The negative electrode foil contributes to the miniaturization and the current withstanding capability of the polymer solid aluminum electrolytic capacitor.

Description

technical field [0001] The invention belongs to the technical field of capacitors, and particularly relates to a negative electrode foil, and also relates to a production process of the negative electrode foil and a polymer solid aluminum electrolytic capacitor made of the negative electrode foil. Background technique [0002] As we all know, the miniaturization of electronic components has always been a hot spot in the industry. In recent years, various smart terminals have developed rapidly, no matter in the fields of civilian consumer electronics, industrial manufacturing, automotive electronics, or military communications. The realization of these terminal functions does not require the support of miniaturized components. It has become an inevitable trend to realize more functions in a limited space, and the demand for miniaturized components will continue. [0003] As a basic component, capacitors are an indispensable device in electronic circuits. They are generally u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/055H01G9/15C23F1/20
CPCH01G9/055H01G9/045H01G9/15H01G9/07H01G9/0032C23F1/20
Inventor 吕上朱金勇蒋武斌
Owner 安徽纳诺箔材有限公司
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