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Preparation method of flexible composite catholyte with high conductivity

A composite cathode and high conductivity technology, which is applied in the direction of capacitor electrolyte/absorbent, capacitor parts, etc., can solve the problems of poor mechanical strength of the composite, weak adhesion, poor performance stability of the cathode electrolyte, etc., and meet the requirements of high frequency Effect

Inactive Publication Date: 2016-07-27
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the production process of the existing conductive composite as the cathode solid electrolyte layer of the solid electrolytic capacitor, the thermal stress generated by the thermal shrinkage of the epoxy resin during molding and sealing leads to poor mechanical strength and weak adhesion of the composite, which leads to the use of Poor stability of its performance as a catholyte for solid electrolytic capacitors

Method used

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  • Preparation method of flexible composite catholyte with high conductivity
  • Preparation method of flexible composite catholyte with high conductivity
  • Preparation method of flexible composite catholyte with high conductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Select tantalum powder with a CV value of 50,000μFV / g, press it into a tablet, and heat it at 1390°C and a vacuum degree higher than 10 -5 Under the condition of Torr, it is sintered at high temperature and high vacuum to form a porous tantalum anode body with a size of 4.3mm×3.1mm×1.2mm containing tantalum leads. to 33V, forming Ta with a thickness of 10-100nm 2 o 5 The dielectric oxide film layer is placed for use.

[0024] Prepare the polymerization solution according to the following formula:

[0025] Liquid A: 4wt% 3,4-ethylenedioxythiophene, 30wt% iron p-toluenesulfonate, 30wt% n-butanol, 34wt% ethanol solution, 2wt% camphorsulfonic acid, put the above-mentioned materials into the beaker in turn, Stir evenly, then add a silane coupling agent according to 0.5% of the total amount, stir evenly, and then place it in a freezer at 0-10°C for refrigeration until use.

[0026] Solution B: 8wt% 3,4-ethylenedioxythiophene, 30wt% iron p-toluenesulfonate, 30%wt n-butanol...

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Abstract

The invention provides a method for preparing a high-conductivity flexible composite catholyte. The method comprises preparing a polymerized A liquid and a polymerized B liquid, and then coating a composite cathode electrolyte with a thickness of 10nm-100nmTa 2 o 5 The porous tantalum anode core block of the dielectric oxide film layer is immersed in the polymerization liquid A and the polymerization liquid B several times successively, and undergoes constant temperature and humidity treatment to finally obtain the high-conductivity flexible composite catholyte of the present invention. The present invention can overcome the shortcomings of poor mechanical strength and weak adhesion of conventional high molecular conductive polymers, and the method of the present invention is used to make the catholyte of solid electrolytic capacitors, which can make the electrolytic capacitors have extremely low equivalent series resistance and low leakage current , can well meet the high-frequency requirements of modern electronic equipment.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing a high-conductivity flexible composite cathode electrolyte. Background technique [0002] Conductive polymer materials can be divided into two categories: structural conductive polymers and composite conductive polymers. Composite conductive polymer materials are made of polymers as the matrix and mixed with antistatic agents, inorganic conductive fillers or hydrophilic polymers. [0003] Conductive polymers as electrode materials not only have a wide range of sources, but also are light in weight and do not pollute the environment. Compared with inorganic electrode materials, conductive polymers as electrodes have a high energy ratio and good voltage characteristics. As well as energy storage components for electric vehicles, especially the development of large-capacity electrolytic capacitors is of great significance. However, in the production process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/028
Inventor 陆胜
Owner CHONGQING TECH & BUSINESS UNIV
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