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Solid electrolytic capacitor electrode slice and preparation method thereof

A capacitor electrode and solid electrolysis technology, applied in the field of electrode sheets, can solve the problems of easy combustion, high production cost, limited environmental protection and future market, and achieve the effects of improving stability and consistency, simple preparation process and low cost

Active Publication Date: 2012-12-05
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In electrolytic capacitors, the traditional aluminum electrolytic capacitors use electrolyte as the dielectric material. This kind of capacitors cannot get rid of the danger of thermal expansion due to physical characteristics, and there is a dangerous phenomenon of leakage, which makes aluminum electrolytic capacitors face unprecedented pressure and challenges. In addition, traditional aluminum electrolytic capacitors use manganese dioxide as the cathode material. In addition to the danger of burning due to voltage problems, the future market will be greatly restricted due to environmental protection issues
[0003] The organic semiconductor TCNQ is a kind of cyanide, and it is easy to volatilize highly toxic cyanide gas at high temperature. Therefore, the application of TCNQ is limited.
The polymer product PEDOT is used as a solid capacitor for the cathode material, and its production cost is high, which limits the application of PEDOT

Method used

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  • Solid electrolytic capacitor electrode slice and preparation method thereof
  • Solid electrolytic capacitor electrode slice and preparation method thereof
  • Solid electrolytic capacitor electrode slice and preparation method thereof

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preparation example Construction

[0022] The preparation method of above-mentioned solid electrolytic capacitor electrode sheet provided by the present invention, its steps are as follows:

[0023] S1. Dip the aluminum foil or aluminum mesh into a container containing a suspension of barium titanate nanopowder, and then heat-treat at 500-700° C. for at least 0.5 to 12 hours in a vacuum atmosphere to obtain an aluminum foil or aluminum mesh coated with barium titanate;

[0024] S2, dissolving graphene oxide in an aqueous solution, and then adding conductive polymers (such as conductive polymers including aniline monomers, 3,4-ethylenedioxythiophene monomers or pyrrole monomers) to the aqueous solution to obtain electrolytic liquid; wherein, in the electrolyte, the molar concentration of graphene oxide is 1~3mol / L;

[0025] S3. Insert the aluminum foil or aluminum mesh coated with barium titanate prepared in step S1 into the electrolyte solution prepared in step S2 as an electrode, and pass a direct current of 1...

Embodiment 1

[0034] The preparation method of solid electrolytic capacitor electrode sheet is as follows:

[0035] (1) Graphite oxide: add 20 g of 50-mesh graphite powder with a purity of 99.5%, 10 g of potassium persulfate and 10 g of phosphorus pentoxide into concentrated sulfuric acid at 80° C., stir evenly, cool for more than 6 hours, wash until neutral, and dry; Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water After 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide successively, after which the color of the mixture turns bright yellow, suction filter while it is hot, and then wash with 5L of 10% hydrochloric acid, suction filter, Graphite oxide was obtained by vacuum drying at 60°C for 48 hours;

[0036] (2) immersing the aluminum foil in a container filled with a suspens...

Embodiment 2

[0043] The preparation method of solid electrolytic capacitor electrode sheet is as follows:

[0044] (1) Graphite oxide: add 20 g of 50-mesh graphite powder with a purity of 99.5%, 10 g of potassium persulfate and 10 g of phosphorus pentoxide into concentrated sulfuric acid at 80° C., stir evenly, cool for more than 6 hours, wash until neutral, and dry; Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water After 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide successively, after which the color of the mixture turns bright yellow, suction filter while it is hot, and then wash with 5L of 10% hydrochloric acid, suction filter, Graphite oxide was obtained by vacuum drying at 60°C for 48 hours;

[0045] (2) immersing the aluminum foil in a container containing a suspension...

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Abstract

The invention discloses a solid electrolytic capacitor electrode slice and a preparation method thereof, belonging to the field of capacitor electrode. The solid electrolytic capacitor electrode slice is structurally made of aluminum / aluminum oxide-barium titanate / graphene-conductive macromolecule. As the graphene is used for taking the place of a conductive macromolecule electrolyte material, the solid electrolytic capacitor electrode slice provided by the invention has excellent stability and consistency; and moreover the electrode slice is simple in preparation process, low in cost and is applicable to industrial production.

Description

technical field [0001] The invention relates to an electrode sheet, in particular to an electrode sheet of a solid electrolytic capacitor and a preparation method thereof. Background technique [0002] Solid capacitors are mainly divided into organic small molecules such as manganese dioxide and TCNQ, and organic polymer solid capacitors such as PEDOT. In electrolytic capacitors, traditional aluminum electrolytic capacitors use electrolyte as the dielectric material. This kind of capacitor cannot get rid of the physical characteristics of thermal expansion and the danger of leakage, which makes aluminum electrolytic capacitors face unprecedented pressure and challenges. ; In addition, traditional aluminum electrolytic capacitors use manganese dioxide as the cathode material. In addition to the danger of burning due to voltage problems, the future market will be greatly restricted due to environmental protection issues. [0003] The organic semiconductor TCNQ is a kind of cy...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/15
CPCH01G9/04H01G9/15
Inventor 周明杰王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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