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Method for manufacturing solid polymer electrolytic condenser

A solid polymer, electrolyte technology, applied in solid electrolytic capacitors, electrolytic capacitors, capacitors and other directions, can solve the problems of poor performance, large ESR, poor reliability of capacitors, etc., to improve the ability of high temperature resistance and humidity resistance, equivalent The effect of stabilizing the ESR of the series resistance and improving the bonding strength

Inactive Publication Date: 2013-12-25
CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the capacity extraction rate of the capacitor is low, and the ESR is also large.
Patent CN 101899212 A proposes a method for making a dispersant and a low-ESR conductive polymer electrolytic capacitor, but since the particles of the dispersion are not separated according to the particle size during the purification process, the formed capacitor cannot meet the needs of high-frequency circuits
Moreover, the presence of undoped polyanions (i.e., polyanions that do not contribute to the conductivity) in excess results in poor reliability of the capacitor, especially in high-humidity atmospheres

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Taking the valve metal tantalum as an example, the detailed preparation process of the method

[0033] (1) Preparation of the first layer:

[0034] Complete the preparation of the dielectric oxide film on the surface of the anode block according to the existing process;

[0035] Reform the dielectric oxide film layer in 0.03%-0.05% p-toluenesulfonic acid solution / phosphoric acid solution, then take it out and dry it in the air at 150°C for 1h;

[0036] According to process step (1) A-B, at Ta 2 o 5 Media surface adhesive layer processing:

[0037] The adhesive is mainly based on silane compounds, such as aminopropyltriethoxysilane, vinyltriethoxysilane, silane coupling agent, aminopropyltriethoxysilane, ethylenediaminopropyltri Ethoxysilane, epoxy silane, etc., and the dilution concentration of the adhesive is 0.01%-5%;

[0038] The adhesive layer is obtained by immersing the aqueous solution of the adhesive at room temperature for 5 minutes, and drying for 30 minu...

Embodiment 2

[0062] Preparation of anode block

[0063] A certain amount of binder is added to commercial capacitor-grade tantalum powder, and a tantalum block with a size of 3.1×0.9×4.6 (mm) is formed by compression molding. High-temperature vacuum sintering volatilizes the binder and makes the tantalum powder effectively bonded and sintered. With a specific volume of 36,600 CV / g, these sintered tantalum blocks were used in the following examples.

Embodiment 3

[0065] Immerse the sintered tantalum block in a phosphoric acid solution at 60°C with a concentration of 0.03%, apply a DC voltage of 55V, and form amorphous Ta on the surface of the tantalum block through an electrochemical reaction. 2 o 5 medium. Dip the tantalum block with a dielectric layer into the aqueous solution of silane coupling agent with a weight concentration of 3%, the immersion time is 5min, and then at 50-100℃ ， Dry in an air environment with a relative humidity of 30%-70% for 30 minutes. Immerse the tantalum block covered with the adhesive layer in a 25% by weight iron p-toluenesulfonate solution for 5 minutes, and then put it in an oven at 23°C for 60 minutes to dry. The solution of butyl acetate or its derivatives impregnated with a weight concentration of 5% monomer was impregnated for 5 minutes, and dried in an oven at a temperature of 23° C. for 30 minutes. Wash in p-toluenesulfonic acid solution at 50°C for 30 minutes, wash in deionized water at 70°C ...

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Abstract

The invention provides a method for manufacturing a solid polymer electrolytic condenser and belongs to the technical field of electronic elements. The method is characterized in that a first conducting polymer layer is prepared on the surface of tantalum pentoxide electrolyte, a second conduction polymer layer is prepared on the surface of the first conducting polymer layer, intrinsic conductive polymer is prepared on the first conducting polymer layer through the in-situ chemical oxidative polymerization method, the second conducting polymer layer is prepared through conducting polymer suspension liquid, and a middle adhesion layer is prepared between the first conducting polymer layer and the second conducting polymer layer through silane. The electrolytic condenser manufactured through the method is stable in electrical property like capacitance, leak currents, ESR and loss under various complex environments, and has high high-temperature resistance, high-humidity resistance and high-voltage resistance abilities.

Description

technical field [0001] The invention relates to a method for preparing a solid electrolytic capacitor, in particular to a method for manufacturing a temperature-resistant, moisture-resistant and pressure-resistant solid conductive polymer electrolytic capacitor. Background technique [0002] With the acceleration of the digitalization, miniaturization and high-speed process of electronic equipment, the capacitors used in electronic equipment are required to be small, large-capacity, and have low impedance in the high-frequency region. Polymer electrolytic capacitors can better meet the above requirements, and low ESR can also reduce energy consumption, which is very important in the development and application of electric vehicles. Another attractive feature of polymer electrolytic capacitors is their self-healing, or electrical regulation, mechanism by which they can repair any microscopic defects created during their formation. [0003] Polymer electrolytic capacitors hav...

Claims

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Application Information

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IPC IPC(8): H01G9/15H01G9/028H01G9/042H01G9/048
Inventor 田东斌方鸣冯建华金源王安玖梁正书刘健
Owner CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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