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Solid electrolytic capacitor based on graphene composite polyaniline

A graphene composite and solid-state electrolysis technology, which is applied in the direction of solid electrolytic capacitors, capacitor parts, capacitor electrolytes/absorbents, etc., can solve problems such as increasing internal resistance and reducing capacitor performance, and achieves improved stability and high stability and reliability, the effect of low equivalent series resistance

Active Publication Date: 2014-10-01
YIYANG WANJINGYUAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, this in-situ chemical oxidative polymerization method to manufacture solid capacitors will cause the oxidant used in the polymerization reaction to interact with the electrode surface to increase the internal resistance and reduce the performance of the capacitor.

Method used

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  • Solid electrolytic capacitor based on graphene composite polyaniline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Insert the separator between the anode foil and the cathode foil, and wind it into a core package, immerse it in the chemical conversion solution composed of phosphoric acid, and apply a voltage of 19.2V at 15°C (the repair temperature is 60°C-95°C) for chemical conversion repair. And carry out carbonization, cleaning and drying treatment. Dissolve 4.66g of graphite oxide in 500mL of water, ultrasonicate for 2 hours to obtain a stable brown graphene oxide aqueous solution, add 46.6g of aniline monomer (mass ratio of graphite oxide to aniline is 1:10), then add 147g of phosphoric acid, and ultrasonically stir for half After one hour, set the volume to 1000ml to obtain a graphene oxide / aniline dispersion, which is divided into two parts on average, one part is dispersion A; 2.5g ammonium persulfate is added in the other part to obtain dispersion B; The core bag was immersed in the dispersion A for 0.5 hours, a 3V DC voltage was applied between the anode and the cathode of...

Embodiment 2

[0035]Insert a separator between the anode foil and the cathode foil, and wind it into a core package, immerse it in a chemical solution composed of phosphoric acid, apply a voltage of 19.2V at 15°C for chemical conversion repair, and perform carbonization, cleaning, and drying treatments. Dissolve 23.3g of graphite oxide in 500mL of water, and ultrasonicate for 2 hours to obtain a stable brown graphene oxide aqueous solution. After adding 46.6g of aniline monomer (mass ratio of graphite oxide to aniline is 1:2), add 441g of phosphoric acid, and ultrasonically stir for half After one hour, set the volume to 1000ml to obtain a graphene oxide / aniline dispersion, which is divided into two parts on average, one part is dispersion A; 2.5g ammonium persulfate is added in the other part to obtain dispersion B; The core package was immersed in the dispersion A for 2 hours, a 5V DC voltage was applied between the anode and the cathode of the electrolytic capacitor, and electrochemical p...

Embodiment 3

[0037] Insert a separator between the anode foil and the cathode foil, and wind it into a core package, immerse it in a chemical solution composed of phosphoric acid, apply a voltage of 19.2V at 15°C for chemical conversion repair, and perform carbonization, cleaning, and drying treatments. Dissolve 14g of graphite oxide in 500mL of water, and ultrasonicate for 2 hours to obtain a stable brown graphene oxide aqueous solution. After adding 46.6g of aniline monomer (mass ratio of graphite oxide to aniline is 3:10), add 147g of phosphoric acid, and ultrasonically stir for half an hour. hour, set the volume to 1000ml, and obtain the graphene oxide / aniline dispersion liquid, which is divided into two parts on average, one part is the dispersion liquid A liquid; 2.5g ammonium persulfate is added to the other part to obtain the dispersion liquid B liquid; Immerse the core package in dispersion A for __ hours, apply a 3V DC voltage between the anode and cathode of the electrolytic capa...

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Abstract

The invention relates to a solid electrolytic capacitor based on graphene composite polyaniline. A manufacturing method includes the steps that a core package formed in a winding mode is carbonized, after formation and repair are completed, the core package is impregnated in a graphene composite monomer and doping agents, an electrochemical polymerization reaction is conducted, when the electrochemical polymerization reaction is conducted to a certain degree, the core package is impregnated in the graphene composite monomer and oxidizing agents and heated for polymerization, and encapsulation, aging and sorting are carried out after polymerization is finished. The solid electrolytic capacitor manufactured through the method has the advantages of being low in equivalent series resistance, small in leakage current and high in reliability.

Description

technical field [0001] The present invention relates to a method for manufacturing a solid electrolytic capacitor, more particularly, to a method for manufacturing a solid electrolytic capacitor based on graphene composite polyaniline. Background technique [0002] Capacitors are one of the three basic components of the electronics industry and are widely used in various electronic products. Currently, liquid electrolytic capacitors are dominating the market, accounting for the majority share of the capacitor market. However, due to the development of electronic science and technology, electronic products are developing in the direction of high frequency, miniaturization, and high reliability, and the requirements for capacitor performance, especially at high frequency, high and low temperature, have also increased accordingly. [0003] The liquid electrolytic capacitor has a structure as described below: the anode foil and cathode foil formed by valve metals such as alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/15H01G9/025
Inventor 肖忠良夏凯翔蔡锦丰李仙清周清清
Owner YIYANG WANJINGYUAN ELECTRONICS
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