Solid aluminum electrolytic capacitor cathode conductive film and preparation method and application thereof

A technology for aluminum electrolytic capacitors and cathode conduction, which is applied in the direction of electrolytic capacitors, capacitor electrodes, capacitors, etc., can solve the problems of large environmental load, low conductivity of conductive polymer materials, etc., and achieve high step coverage, good uniformity, and impurity little effect

Pending Publication Date: 2021-09-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Comparing the above literature reports, we found one thing in common, that is, the conductive polymer materials prepared by chemical polymerization or electropolymerization have low conductivity, and the organic solvents used in them will cause a large environmental load

Method used

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  • Solid aluminum electrolytic capacitor cathode conductive film and preparation method and application thereof
  • Solid aluminum electrolytic capacitor cathode conductive film and preparation method and application thereof
  • Solid aluminum electrolytic capacitor cathode conductive film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparatory work: Use an aluminum foil slicing die to cut out the anode foil with the anode lead-out end, and repair the cut edge.

[0042] (2) Metal aluminum (Al) thin films are deposited by atomic layer deposition (ALD). Specifically: put the anode foil obtained after the treatment in step (1) into the ALD reaction chamber, vacuumize to 0.5Pa, and the deposition temperature is 250°C; , wash with high-purity inert gas for 20s to wash away reaction by-products and residual precursors; after introducing hydrogen plasma into the reaction chamber for 10s, wash with high-purity inert gas for 20s to wash away reaction by-products and residual gases. After cooling to room temperature, remove the aluminum foil.

[0043] (3) A layer of conductive carbon paste is drip-coated on the surface of the anode foil after step (2), and after curing at room temperature, silver paste is drip-coated, and a silver wire is placed as a cathode lead-out end.

[0044] The conductivity test o...

Embodiment 2

[0046] (1) Preparatory work: Use an aluminum foil slicing die to cut out the anode foil with the anode lead-out end, and repair the cut edge.

[0047] (2) Metal silver (Ag) thin films were deposited by atomic layer deposition (ALD). Specifically: put the anode foil obtained after the treatment in step (1) into the ALD reaction chamber, evacuate to 0.5Pa, and set the deposition temperature at 140°C; set the inlet temperature of the precursor to 125°C, and inject the After the precursor (2,2-dimethylpropionate) silver (I) triethylphosphine, wash with high-purity inert gas for 9s, wash away the reaction by-products and residual precursor; pass into the reaction chamber After 7s of hydrogen plasma, clean with high-purity inert gas for 9s to wash away reaction by-products and residual gases. After cooling to room temperature, remove the aluminum foil.

[0048] (3) A layer of conductive carbon paste is drip-coated on the surface of the anode foil after step (2), and after curing a...

Embodiment 3

[0051] (1) Preparatory work: Use an aluminum foil slicing die to cut out the anode foil with the anode lead-out end, and repair the cut edge.

[0052] (2) Metal platinum (Pt) thin films are deposited by atomic layer deposition (ALD). Specifically: put the anode foil obtained after the treatment in step (1) into the ALD reaction chamber, evacuate to 0.5Pa, and set the deposition temperature at 250°C; After the precursor platinum acetylacetonate, wash with high-purity inert gas for 20s to wash away the reaction by-products and residual precursors; after 5s of ozone is introduced into the reaction chamber, wash with high-purity inert gas for 20s to wash away the reaction by-products and residual gas. After cooling to room temperature, remove the aluminum foil.

[0053] (3) A layer of conductive carbon paste is drip-coated on the surface of the anode foil after step (2), and after curing at room temperature, silver paste is drip-coated, and a silver wire is placed as a cathode l...

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Abstract

The invention discloses a solid aluminum electrolytic capacitor cathode conductive film and a preparation method and application thereof, and belongs to the field of aluminum electrolytic capacitors. The method comprises the following steps: depositing a conductive metal film on the surface of an anode foil dielectric layer of the aluminum electrolytic capacitor by using a vapor deposition method; and leading out a cathode electrode from the deposited conductive layer, namely preparing the conductive film on the surface of the anode foil dielectric layer of the aluminum electrolytic capacitor. According to the gas phase chemical method, the problem that solution molecules are difficult to enter micro holes in the surface of the anode aluminum foil in a liquid phase method is solved, so that the conductive film has high step coverage rate in the micro-nano holes, and the capacity extraction rate of the capacitor is improved. The conductive thin film prepared by adopting the gas phase chemical method has the advantages of compact structure, few impurities, good uniformity and the like.

Description

technical field [0001] The invention belongs to the field of aluminum electrolytic capacitors, in particular to a cathode conductive film of a solid aluminum electrolytic capacitor and a preparation method and application thereof. Background technique [0002] As a common energy storage device, solid aluminum electrolytic capacitors have excellent characteristics such as small volume, large capacity, low cost, high frequency and low impedance, and have broad application prospects in many fields. The performance of the conductive cathode in solid aluminum electrolytic capacitors is the key factor that restricts the performance of solid-state devices. Therefore, the development of solid conductive cathodes with excellent characteristics is the core of solid aluminum electrolytic capacitor research. The currently used methods for preparing conductive cathodes of solid aluminum electrolytic capacitors are mainly liquid-phase methods. The liquid phase method has the advantages o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/042H01G9/048
CPCH01G9/04H01G9/048H01G9/0425
Inventor 熊礼龙武晶晶杜显锋
Owner XI AN JIAOTONG UNIV
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