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Solid electrolytic capacitor

A solid electrolysis, solid electrolyte layer technology, applied in solid electrolytic capacitors, capacitor parts, capacitor electrolytes/absorbents, etc., can solve problems such as low performance, and achieve the effect of excellent ESR performance

Active Publication Date: 2008-11-12
ZHENGZHOU TAIDA ELECTRONICS MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

and solve problems such as poor performance in high temperature environments

Method used

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  • Solid electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (Synthesis of polystyrenesulfonic acid-poly(3,4ethylenedioxy)thiophene)

[0089] With 5g of 3,4-ethylenedioxythiophene, 500g of 3wt% polystyrenesulfonic acid aqueous solution, 10g of 50wt% sulfophthalic acid aqueous solution and 9g of sodium persulfate, 1g of iron sulfate dissolved in 500ml of water , stirred for 18 hours.

[0090] After treatment with aqueous ammonia, ion exchange resin was used to remove residual ions in the solution to obtain dark blue 1.6 wt% polystyrene sulfonate ammonium-poly(3,4-ethylenedioxy)thiophene aqueous solution.

[0091] 10 g of the obtained 1.6 wt % polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution and 0.8 g of triethylene glycol were mixed and stirred to obtain a dark blue solid electrolyte solution.

[0092] (Manufacturing of solid electrolytic capacitors)

[0093] After the solid electrolyte solution is impregnated into the semi-finished element of the wound capacitor by vacuum decompression method, it is dr...

Embodiment 2

[0095] 10 g of 1.6 wt % polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution obtained in Example 1 and 0.8 g of polyglycol 1000 were mixed and stirred to obtain a dark blue solid electrolyte solution.

[0096] After impregnating the solid electrolyte solution into the semi-finished element of the winding capacitor by vacuum decompression method, dry it in an oven at 120°C, then impregnate 10wt% ammonium adipate aqueous solution, and dry it in an oven at 120°C. After the case and the rubber cover seal the element containing the solid electrolyte, a solid electrolytic capacitor is obtained. The same method as in Example 1 was evaluated, and the results are shown in Table 1.

Embodiment 3

[0098] 10g of 1.6wt% polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution obtained in Example 1, 0.2g of xylitol and 0.8g of polyglycol 1000 were mixed and stirred to obtain dark blue solid electrolyte solution. In the same manner as in Example 2, a solid electrolytic capacitor was obtained, and the evaluation results are shown in Table 1.

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Abstract

The invention relates to a solid electrolytic capacitor; wherein, an anode body is made from a metallic porous body having the function of a valve; a dielectric layer is composed by an oxide film formed on the surface of the metal functioning as a valve; a solid electrolyte layer is arranged between the dielectric layer formed by the oxide film and a cathode body; the solid electrolyte layer comprises a complex containing conductive polymer and poly sulfonic acid, and a compound containing carboxyl and sulfonic group; the invention also comprises a cathode. The electrolytic capacitor has the advantages of high capacity, low ESR, and so on; in high temperature environment, the performance of the solid electrolytic capacitor can still be maintained.

Description

technical field [0001] The present invention relates to solid electrolytic capacitors and to surface mount transmission line components using the solid electrolytic capacitors. Background technique [0002] Conductive polymer compositions including conductive polymers are expected to be used in applications requiring electrical conductivity, conductive coatings, antistatic agents, electromagnetic wave shielding materials, transparent conductive materials, battery materials, capacitor materials, sensors, electronic device materials, Semiconductive materials, electrostatic copying parts, transfer printing parts, electrophotographic materials, etc. [0003] Especially in recent years, along with the digitization of electronic devices, it has been increasingly required to lower the impedance of capacitors used in high-frequency regions. In order to meet this requirement, an anode composed of a porous body of a valve-acting metal such as aluminum, tantalum, niobium, etc., a diel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/15H01G9/025
Inventor 李玉萍黄文锋姬峰
Owner ZHENGZHOU TAIDA ELECTRONICS MATERIAL TECH
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