Novel dispersion liquid for solid capacitor, capacitor and preparation method thereof

A capacitor and dispersion technology, applied in the field of capacitors, can solve the problems of low capacity extraction rate, poor high temperature resistance, low temperature resistance, and poor resistance to repeated charging and discharging, and achieves easy extraction of capacitor capacity, good emulsification effect, Effects of low ESR values

Active Publication Date: 2021-10-15
广东华鸿科技有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current capacitors prepared with PEDOT / PSS dispersion also have major disadvantages: (1) The long-term high-temperature stability of the capacitor is poor (poor high-temperature resistance), especially the capacitance and the equivalent series resistance (ESR) change significantly at high temperatures. Poor; (2) Affected by the particle size, the lead-out rate of capacitor capacity is lower than that of liquid capacitors; (3) Low temperature resistance and repeated charge and discharge resistance are worse than in-situ polymerization methods

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
  • Novel dispersion liquid for solid capacitor, capacitor and preparation method thereof
  • Novel dispersion liquid for solid capacitor, capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a novel dispersion liquid for solid capacitors, comprising the following steps:

[0036](1) 8.8g of sulfonated polystyrene-polyisoprene diblock copolymer with a weight-average molecular weight of 100,000 and 135.5g of deionized water were added to the reaction vessel, and after heating and stirring to dissolve, 6.40g of hydrogen peroxide and 0.006g ferric chloride, be down to room temperature after stirring and dissolving, obtain mixed solution;

[0037] (2) Add 3.0g 3,4-ethylenedioxythiophene to the mixed solution, and carry out polymerization reaction at room temperature;

[0038] (3) After the polymerization reaction stops, the pH value is adjusted, and the PEDOT / PSS dispersion is obtained through aging and removal of inorganic salts, with a yield of 92% and a conductivity of 544 S / cm.

[0039] The dispersion liquid of this example was used as the impregnation liquid, impregnated onto the oxide layer, and then the dispersant was removed by eva...

Embodiment 2

[0041] A method for preparing a novel dispersion liquid for solid capacitors, comprising the following steps:

[0042] (1) Add 8.8g of sulfonated polystyrene-polyisoprene diblock copolymer with a weight average molecular weight of 100,000 and 135.5g of deionized water into the reaction vessel, heat and stir to dissolve, then add 3.20g of hydrogen peroxide and 0.020g ferric chloride, be down to room temperature after stirring and dissolving, obtain mixed solution;

[0043] (2) Add 3.0g 3,4-ethylenedioxythiophene to the mixed solution, and carry out polymerization reaction at room temperature;

[0044] (3) After the polymerization reaction stops, the pH value is adjusted, and the PEDOT / PSS dispersion is obtained through aging and removal of inorganic salts, with a yield of 86% and a conductivity of 728 S / cm.

[0045] The dispersion liquid of this example was used as the impregnation liquid, impregnated onto the oxide layer, and then the dispersant was removed by evaporation to ...

Embodiment 3

[0047] A method for preparing a novel dispersion liquid for solid capacitors, comprising the following steps:

[0048] (1) Add 8.8g of sulfonated polystyrene-polyisoprene diblock copolymer with a weight average molecular weight of 10000 and 135.5g of deionized water into the reaction vessel, heat and stir to dissolve, then add 6.4g of hydrogen peroxide and 0.006g ferric chloride, be down to room temperature after stirring and dissolving, obtain mixed solution;

[0049] (2) Add 12.0g 3,4-ethylenedioxythiophene to the mixed solution, and carry out polymerization reaction at room temperature;

[0050] (3) After the polymerization reaction stops, the pH value is adjusted, and the PEDOT / PSS dispersion is obtained through aging and removal of inorganic salts, with a yield of 80% and a conductivity of 688 S / cm.

[0051] The dispersion liquid of this example was used as the impregnation liquid, impregnated onto the oxide layer, and then the dispersant was removed by evaporation to fo...

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

PropertyMeasurementUnit
electrical conductivityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
electrical conductivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a novel dispersion liquid for a solid capacitor, a capacitor and a preparation method thereof. The present invention selects polyanions such as sulfonated polystyrene block copolymers, acidified polystyrene block copolymers, and sulfonated polystyrene graft copolymers to replace polystyrene sulfonic acid, and improves the rigid structure of PSS through modification. Endows the PEDOT structure with a certain degree of flexibility, thereby improving the performance of the PEDOT / PSS film, and solving the problems of the high temperature resistance, low temperature resistance, and repeated charge and discharge resistance of the capacitor caused by the PSS structure. Polyanions such as polystyrene block copolymers, acidified polystyrene block copolymers, and sulfonated polystyrene graft copolymers have better emulsification effects, smaller emulsion droplets, and the particle size of the prepared PEDOT dispersion It is smaller and has higher conductivity, which makes it easier to extract the capacitor capacity, and the ESR value of the prepared capacitor is lower.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a novel dispersion liquid for solid capacitors, a capacitor and a preparation method thereof. Background technique [0002] An electrolytic capacitor generally consists of a porous metal electrode, an oxide layer on the surface of the metal serving as a dielectric, a conductive material introduced into the porous structure, and the like. Commonly used electrolytic capacitors include tantalum electrolytic capacitors, niobium electrolytic capacitors, aluminum electrolytic capacitors, etc., the anode of which is formed by anodic oxidation to have a uniform oxide dielectric layer; a liquid or solid electrolyte forms the cathode of the capacitor. In addition, aluminum capacitors in which the anode electrode is made of valve metal aluminum on which a uniform and electrically insulating aluminum oxide layer is formed as a dielectric by anodization are also commonly used, and a liquid...

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 Patents(China)
IPC IPC(8): H01G9/15H01G9/04H01G9/00
CPCH01G9/0032H01G9/04H01G9/15
Inventor 张茂华陈伟科黎民
Owner 广东华鸿科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products