A solid aluminum electrolytic capacitor with high capacitance extraction rate and preparation method thereof

An aluminum electrolytic capacitor, solid-state technology, applied in the manufacture of electrolytic capacitors, solid electrolytic capacitors, electrolytic capacitors, etc., can solve the problems of poor film uniformity, large leakage current, poor film thickness uniformity, etc., and achieve the improvement of extraction rate and leakage current performance. Effect

Active Publication Date: 2022-04-29
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film thickness uniformity of PEDOT:PSS is poor. This is because the molecular weight of PEDOT is small, while the molecular weight of PSS is high. There are some sites on the main chain of PEDOT that are not combined with the short chain of PEDOT. In order to maintain the stability of the dispersion, PEODT:PSS The PSS in the system is usually excessive, which leads to the poor uniformity of the PEDOT:PSS film; it also makes the lead-out rate of the capacitor not high, and the leakage current is large
At the same time, although the conductivity of PEDOT:PSS is higher, for capacitors, the higher the conductivity of the conductive polymer, the smaller the internal resistance of the solid aluminum electrolytic capacitor and the stronger the ability to withstand ripple current. So for PEDOT:PSS, there is still room for improvement in conductivity

Method used

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  • A solid aluminum electrolytic capacitor with high capacitance extraction rate and preparation method thereof
  • A solid aluminum electrolytic capacitor with high capacitance extraction rate and preparation method thereof

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Embodiment 1

[0033] A solid aluminum electrolytic capacitor with a high capacitance extraction rate, comprising a core package sealed in an outer casing, the core package is formed by winding an anode foil, non-carbonized electrolytic paper and a cathode foil, and the anode foil and the cathode foil are wound Filled with PEDOT doped with sodium lignosulfonate (LS), ie PEDOT:LS.

[0034] In the present invention, because the electrical conductivity of PEDOT:LS film is lower than PEDOT; So in order to reduce the ESR of capacitor, can be attached with PEDOT on electrolytic paper, between described electrolytic paper and anode foil and between electrolytic paper and negative electrode The foils are filled with PEDOT doped with sodium lignosulfonate, PEDOT:LS.

[0035] Such as figure 2 As shown, PEDOT:PSS is a mixture of rigid PEDOT chains and flexible PSS chains. During the molding process of the dispersion, PEDOT and PSS tend to separate to form stable respective continuous phases to mainta...

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Abstract

A solid aluminum electrolytic capacitor with high capacitance extraction rate, including a core package sealed in the casing, the core package is wound by anode foil, non-carbonized electrolytic paper and cathode foil, and the anode foil and cathode foil are filled with wood PEDOT doped with sodium sulfonate is PEDOT:LS. The conductivity of the PEDOT:LS film formed on the core pack in the present invention is similar to that of the traditional PEDOT:PSS film, but the uniformity of the PEDOT:LS film is much higher than that of the PEDOT:PSS film, which makes the lead-out of the capacitor The efficiency and leakage current performance should be greatly improved.

Description

technical field [0001] The invention relates to a solid aluminum electrolytic capacitor, in particular to a solid aluminum electrolytic capacitor with high capacitance extraction rate and a preparation method thereof. Background technique [0002] The electrolyte in the low-voltage solid capacitor is impregnated with the monomer, impregnated with the oxidant, and then polymerized into the inside of the capacitor element, and filled with PEDT produced by chemical in-situ polymerization. Since the oxidizing agent has a certain corrosiveness to the oxide film of the anode foil, the withstand voltage value of the solid capacitor will be lower and the leakage current will be larger. [0003] In order to solve the above problems, patent 201610302908.7, a new type of solid aluminum electrolytic capacitor and its production method, proposes that the gap between the electrolytic paper and the anode foil and the electrolytic paper and the cathode foil is filled with PEDOT:PSS. Howeve...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H01G9/00H01G9/012H01G9/04H01G9/15
CPCH01G9/151H01G9/04H01G9/012H01G9/0029
Inventor贾明刘芳洋刘一民汤水艾亮
OwnerCENT SOUTH UNIV