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Method for preparing conductive polymer cathode in solid-state aluminum electrolytic capacitor

A technology of aluminum electrolytic capacitors and conductive polymers, applied in the direction of solid electrolytic capacitors, electrolytic capacitors, capacitor electrodes, etc., can solve the problems of low capacitor capacity lead-out, equivalent series resistance and large loss

Pending Publication Date: 2021-09-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The capacitance of the capacitor prepared in this way is low, and the equivalent series resistance and loss are large.

Method used

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  • Method for preparing conductive polymer cathode in solid-state aluminum electrolytic capacitor
  • Method for preparing conductive polymer cathode in solid-state aluminum electrolytic capacitor
  • Method for preparing conductive polymer cathode in solid-state aluminum electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation: Use an aluminum foil slicing mold to cut out 1*1cm with the anode lead-out end 2 The anode foil of the geometric area is formed by supplementing the trimmed edge.

[0044] (2) Depositing the conductive layer of carbon nanotubes by chemical vapor deposition (CVD). Specifically: put the aluminum foil obtained after the treatment in step (1) into the middle of the quartz boat, and push it into the quartz tube (100 cm long, 35 cm inner diameter). With acetylene (C 2 h 2 ) is the carbon source gas, which is grown directly on the aluminum micro-grate by chemical vapor deposition in a horizontal tube furnace. Before heating to the set temperature (600°C), a certain flow rate of argon gas was passed into the furnace for 30 minutes, and the air was exhausted. Carbon source C 2 h 2 The flow rate introduced into the furnace is 50ml min -1. After 15 min of growth, the tube furnace was cooled to room temperature under an argon atmosphere, and the aluminum fo...

Embodiment 2

[0049] (1) Preparation: Use an aluminum foil slicing mold to cut out 1*1cm with the anode lead-out end 2 The anode foil of the geometric area is formed by supplementing the trimmed edge.

[0050] (2) growing a conductive layer of carbon nanotubes on the dielectric layer by chemical vapor deposition (CVD). Specifically: put the aluminum foil obtained after the above step (1) into the middle of the quartz boat, and push it into the quartz tube (100 cm long, 35 cm internal diameter). With acetylene (C 2 h 2 ) is the carbon source gas, which is grown directly on the aluminum micro-grate by chemical vapor deposition in a horizontal tube furnace. Before heating to the set temperature (600°C), a certain flow rate of argon gas was passed into the furnace for 30 minutes, and the air was exhausted. Carbon source C 2 h 2 The flow rate introduced into the furnace is 40ml min -1 . After 20 min of growth, the tube furnace was cooled to room temperature under an argon atmosphere, and...

Embodiment 3

[0055] (1) Preparation: Use an aluminum foil slicing mold to cut out 1*1cm with the anode lead-out end 2 The anode foil of the geometric area is formed by supplementing the trimmed edge.

[0056] (2) A graphene conductive layer is grown on the dielectric layer by chemical vapor deposition technology. Specifically: put the aluminum foil obtained after the above step (1) into the middle of the quartz boat, push it into the quartz tube (100 cm long, 35 cm inner diameter); Into benzene vapor. React at 400°C for 30 minutes to obtain a graphene conductive layer, and take it out after cooling down to room temperature.

[0057] (3) Electrochemical method was used to prepare polypyrrole on the pre-deposited graphene conductive layer. Specifically: at room temperature and pressure, the constant current method (j≤5mA·cm -2 , Potential ≤ 1V (relative to SCE)), the anode aluminum foil obtained after the above step (2) was electroplated in a solution containing 0.5M pyrrole monomer and ...

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Abstract

The invention discloses a method for preparing a conductive polymer cathode in a solid-state aluminum electrolytic capacitor, and belongs to the field of solid-state aluminum electrolytic capacitors. The method comprises the following steps: pre-depositing a conductive layer on the surface of an anode foil dielectric layer by adopting a chemical vapor deposition method; preparing a conductive polymer on the surface of the deposited conductive layer through an electrochemical method to form a composite conductive layer in a solid-state aluminum electrolytic capacitor; and carrying out cathode electrode extraction on the composite conductive layer to obtain the conductive polymer cathode. According to the invention, the adopted chemical vapor deposition technology avoids the problem that solution molecules are difficult to enter tiny holes in the surface of the anode aluminum foil in an impregnation method and a chemical polymerization method, and effectively avoid the damage of the solution to the dielectric layer.

Description

technical field [0001] The invention relates to the field of solid aluminum electrolytic capacitors, in particular to a technology for preparing a conductive polymer film on the surface of an anode foil of a solid aluminum electrolytic capacitor by using a chemical vapor deposition method. Background technique [0002] The preparation of conductive cathodes in solid-state aluminum electrolytic capacitors is one of the major current issues to be solved. Conductive polymers are currently the main materials widely used as cathode materials for solid aluminum electrolytic capacitors. The methods for preparing conductive polymer cathode film on the surface of solid aluminum electrolytic capacitor anode foil include impregnation method, chemical synthesis method, electrochemical synthesis method and so on. In the impregnation method, due to the influence of the surface tension and molecular size of the solution, it is difficult for the solution molecules to enter the tiny pores o...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/048H01G9/15
CPCH01G9/04H01G9/15H01G9/048
Inventor 熊礼龙武晶晶杜显锋
Owner XI AN JIAOTONG UNIV
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