Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Conductive high polymer, oxidizer for synthesis thereof and solid capacitor

A technology of conductive polymer and oxidant, used in solid electrolytic capacitors, capacitor parts, capacitor electrolytes/absorbents, etc., can solve the problems of complex capacitor manufacturing process, poor structural regularity, loose polymer, etc., and achieve electrochemical performance. Excellent, reduce reactivity, reduce the effect of polymerization reaction rate

Active Publication Date: 2013-05-22
SHENZHEN CAPCHEM TECH
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymerization speed of EDOT is too fast, which is not conducive to the crystallization of PEDOT, resulting in loose polymer and poor structural regularity, which is not conducive to improving the conductivity
[0004] U.S. Patent US4910645 uses a large amount of solvent to dilute the conductive polymer monomer, so that the monomer concentration is lower than 10wt%. The capacitor core can be wrapped in the mixed solution of oxidant and monomer and directly impregnated to realize in-situ polymerization, but only A very small amount of conductive high molecular polymer needs to be impregnated repeatedly 16 times to produce enough conductive high molecular polymer, so the manufacturing process of capacitors will be very complicated

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
  • Conductive high polymer, oxidizer for synthesis thereof and solid capacitor
  • Conductive high polymer, oxidizer for synthesis thereof and solid capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0034] The composition of the oxidizing agent solution for polymerizing conductive polymers is as follows: the molar ratio of ferric ion to p-toluenesulfonate ion is 1:3.0, the mass concentration of p-toluenesulfonate iron is 55%, and the mass concentration of cyclic ether solvent is The concentration is 8%, and the rest is n-butanol. 1 part by weight of the oxidant solution is diluted with 3 parts by weight of n-butanol solvent, mixed uniformly and placed in a constant temperature water bath at 5°C to cool, when the temperature of the oxidant solution drops to 5°C, add 0.25 parts by weight of EDOT monomer, mix well and start timing, when the first polymer particle can be clearly observed, stop timing and define this time interval as the polymerization time, the test results are listed in Table 1.

Embodiment 6-10

[0041] The oxidizing agent used in embodiment 6-10 consists of: the mass concentration of iron p-toluenesulfonate is 40%, the mass concentration of cyclic ether solvent is 8%, and the mass concentration of ethanol is 52%. When measuring the polymerization reaction time, 1 weight part of the oxidant solution was diluted with 2 weight parts of absolute ethanol solvent, and other conditions were the same as in Example 1. The polymerization times corresponding to various oxidants are listed in Table 2.

Embodiment 11-15

[0048] Other conditions are the same as in Example 1, the cyclic ether solvent is tetrahydrofuran, and the addition amount of tetrahydrofuran is changed. The test results are listed in Table 3.

[0049] The influence of table 3 tetrahydrofuran addition amount on polymerization time

[0050] Types of

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 provides an oxidizer solution for conductive high polymer synthesis. The oxidizer solution for conductive high polymer synthesis can be mixed with a polymerized monomer and is used for impregnating a capacitor core package to generate a conductive high polymer through reaction so as to be used for producing a high-performance solid electrolytic capacitor. The oxidizer solution for conductive high polymer synthesis comprises iron sulfonate and solvent, wherein the solvent is lower alcohol and cyclic ether, and the lower alcohol is selected from one or some of monobasic alcohol of which the carbon atom number is 1-4; and the number of oxygen groups of an ether bond in the cyclic ether is 1 or 2, and the ring containing the ether bond is a five-membered one or six-membered one. By using the oxidizer to synthesize a conductive high molecular polymer, the conductivity of the conductive polymer can be improved, thereby reducing the ESR (equivalent series resistance) value of a capacitor.

Description

technical field [0001] The present invention relates to a solid electrolytic capacitor, a conductive polymer used as the electrolyte of the solid electrolytic capacitor, and an oxidant solution used for synthesizing the conductive polymer. Background technique [0002] At present, the oxidants used to polymerize conductive polymers are mainly alkylaromatic sulfonate iron salts, which have good effects in polymerizing monomers such as pyrrole, aniline, and thiophene, and the obtained conductive polymers are widely used. Used in solid electrolytic capacitors, anti-static coatings, LEDs, printed circuit boards and other fields. In particular, PEDOT obtained by oxidatively polymerizing 3,4-ethylenedioxythiophene (EDOT) with ferric p-toluenesulfonate has attracted much attention in the industry because of its high conductivity and high stability. [0003] However, the polymerization reaction speed of alkyl aromatic sulfonic acid iron salt and EDOT is too fast, which is not condu...

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): C08G61/12C08G73/06C08G73/02H01G9/028H01G9/15
Inventor 郑仲天钟玲李兵陈长春
Owner SHENZHEN CAPCHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products