Composite type 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

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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

Method used

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  • Composite type solid electrolytic capacitor electrode slice and preparation method thereof
  • Composite type solid electrolytic capacitor electrode slice and preparation method thereof
  • Composite type solid electrolytic capacitor electrode slice and preparation method thereof

Examples

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Example Embodiment

[0022] The method for preparing the foregoing composite solid electrolytic capacitor electrode sheet provided by the present invention includes the following steps:

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

[0024] S2. Dissolve graphene oxide in an aqueous solution to prepare an electrolyte; wherein the molar concentration of graphene oxide is 1 to 3 mol / L;

[0025] S3. Insert the barium titanate-coated aluminum foil or aluminum mesh prepared in step S1 as an electrode into the electrolyte prepared in step S2, and pass a direct current of 1-10 mA on the electrode, and the energization time is 1-24 h, Obtain aluminum / barium titanate / graphene oxide electrode sheet;

[0026] S4. Place the aluminum / barium titanate / graphene oxide electrode sheet prepared in st...

Example Embodiment

[0033] Example 1

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

[0035] (1) Graphite oxide: Add 20g of 50 mesh graphite powder with a purity of 99.5%, 10g of potassium persulfate and 10g 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 0℃, 230mL concentrated sulfuric acid, and then add 60g potassium permanganate, keep the temperature of the mixture below 20℃, and then keep it in an oil bath at 35℃ for 2h, then slowly add 920mL deionized water After 15min, add 2.8L deionized water and 50mL hydrogen peroxide with a mass concentration of 30% successively, after which the color of the mixture becomes bright yellow, filtered while hot, and then washed and filtered with 5L hydrochloric acid with a concentration of 10%. Vacuum drying at 60°C for 48 hours to obtain graphite oxide;

[0036] (2) Immerse the aluminum foil in a...

Example Embodiment

[0042] Example 2

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

[0044] (1) Graphite oxide: Add 20g of 50 mesh graphite powder with a purity of 99.5%, 10g of potassium persulfate and 10g 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 0℃, 230mL concentrated sulfuric acid, and then add 60g potassium permanganate, keep the temperature of the mixture below 20℃, and then keep it in an oil bath at 35℃ for 2h, then slowly add 920mL deionized water After 15min, add 2.8L deionized water and 50mL hydrogen peroxide with a mass concentration of 30% successively, after which the color of the mixture becomes bright yellow, filtered while hot, and then washed and filtered with 5L hydrochloric acid with a concentration of 10%. Vacuum drying at 60°C for 48 hours to obtain graphite oxide;

[0045] (2) Immerse the aluminum foil in a...

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Abstract

The invention discloses a composite type solid electrolytic capacitor electrode slice and a preparation method thereof, belonging to the field of capacitor electrodes. The composite solid electrolytic capacitor electrode slice is structurally made of aluminum/aluminum oxide-barium titanate/graphene. As the graphene is used for taking the place of a conductive macromolecule electrolyte material, the composite 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 composite 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 ...

Claims

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Application Information

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