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Solid electrolytic capacitor and method for preparing the same

A technology of solid electrolysis and solid electrolyte, which is applied in the direction of solid electrolytic capacitors and capacitor parts, etc., can solve the problems of low performance and achieve the effect of low unit price, simple method and 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 and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] (Synthesis of polystyrenesulfonic acid-poly(3,4ethylenedioxy)thiophene)

[0106] 5g of 3,4-ethylenedioxythiophene, 500g of 3wt% polystyrene sulfonic acid aqueous solution, 9g of sodium persulfate, 2g of ferric sulfate, and 5g of concentrated sulfuric acid were dissolved in 1500ml of water and stirred for 18 hours .

[0107] 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.

[0108] 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.

[0109] (Manufacturing of solid electrolytic capacitors)

[0110] After the solid electrolyte solution is impregnated into the semi-finished element of the wound capacitor by vacuum decompression method, it is dried in a...

Embodiment 2

[0113]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 200 were mixed and stirred to obtain a dark blue solid electrolyte solution.

[0114] After the solid electrolyte solution is impregnated into the semi-finished element of the winding capacitor by vacuum decompression, it is dried in an oven at 120°C, and then dried in an oven at 120°C after impregnating 10wt% ammonium adipate aqueous solution. After impregnating the 10wt% polyimide-N-methyl-2-pyrrolidone solution containing 0.5wt% vitamin C into the element of the solid electrolyte by vacuum decompression method, dry it in an oven at 120°C to obtain Solid electrolyte element with organic protective film. The solid electrolytic capacitor is obtained after the element containing the solid electrolyte is sealed with a casing and a rubber cover. Table 1 shows the results of evaluating the performance (capacity, ESR) of the solid electrol...

Embodiment 3

[0116] The 1.6wt% polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution that embodiment 1 obtains, the xylitol of 0.2g, the polyglycol 10000 of 0.8g, the 25wt% of 6g The polysulfonate resin was mixed and stirred to obtain a 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 provided with a dielectric layer on the surface and functioning as a valve; a capacitor element is formed by a solid electrolyte and a cathode body; the periphery of the capacitor element is provided with more than one oxidation protection film; the principal component of the oxidation protection film is resin. The capacitor has the advantages of excellent ESR performance and stability under high temperature. The invention also relates to a preparation method of the solid electrolytic capacitor, which is characterized in that: the solid electrolyte and the oxidation protection film are dipped in a liquid solution, and then is dried and hardened to prepare the solid electrolytic capacitor. The preparation method can produce the high-performance solid electrolytic capacitor with a simple and cheap method.

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, semi Conductive materials, xerographic parts, transfer 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 dielectric oxide film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/15H01G9/004
Inventor 李玉萍姬峰黄文锋
Owner ZHENGZHOU TAIDA ELECTRONICS MATERIAL TECH
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