High-specific volume cathode foil solid electrolytic capacitor and preparing method thereof

A solid electrolysis and cathode foil technology, applied in solid electrolytic capacitors, electrolytic capacitors, capacitors, etc., can solve the problems of increasing impedance and ESR value, increasing impedance and ESR, and decreasing the degree of bonding, so as to reduce impedance and ESR value and achieve good results. Impedance frequency characteristics, long life effect

Active Publication Date: 2006-11-15
STARZEON ELECTRONICS DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after being carbonized at high temperature in the air for a period of time, you will find that its capacity is greatly attenuated, and its impedance and ESR value have also increased a lot, which has caused great difficulties for using it as a cathode foil for solid capacitors.
[0011] Through the analysis of the surface of this kind of high specific volume cathode foil, it is fo...

Method used

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  • High-specific volume cathode foil solid electrolytic capacitor and preparing method thereof
  • High-specific volume cathode foil solid electrolytic capacitor and preparing method thereof
  • High-specific volume cathode foil solid electrolytic capacitor and preparing method thereof

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Embodiment 1

[0059] Embodiment 1: Select the high specific volume cathode foil of the present invention, the specific volume of the cathode foil is 2300 μF / cm 2 , and the rest are the same as Comparative Example 1.

Embodiment 2

[0061] Select the high specific volume cathode foil of the present invention, the specific volume of the cathode foil is 2300μF / cm 2 , insert electrolytic paper containing Manila hemp fiber between the anode aluminum foil and the cathode aluminum foil, the paper density is 0.4 g / cm 3 , with a thickness of 40 μm, they are rolled up to form a coiled capacitor core. At a temperature of 85 ° C, the capacitor core is oxidized with a 7% ammonium adipate solution for 30 minutes, and then baked at 220 ° C for 90 minutes to make The electrolytic paper is completely carbonized, and the carbonized capacitor core is immersed in a solution of iron toluenesulfonate n-butanol containing 3% to 5% of 3.4-ethylenedioxythiophene (EDT) for 30 minutes at 20-30°C and a vacuum below 20mmHg Carry out chemical oxidative polymerization. The following steps are the same as in Example 1 to prepare a solid electrolytic capacitor.

[0062] According to Comparative Example 1, the initial characteristics a...

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Abstract

This invention relates to high specific volume cathode foil solid electrolytic capacitor and its preparation method. This invention provides rolling type solid electrolytic capacitor that dielectric medium is high conductivity polymer, purpose made high specific volume cathode foil is used in the capacitor, so the electric capacity is large, resistor is low. This invention includes aluminum shell, two outgoing line that welded on aluminum peduncle, the peduncle is connected to the cathode and anode foils, the foils wind into capacitor core after isolated by membrane. The core is set in the shell, a layer alumina is brought to the aluminum foil of the cathode foil, and a layer of titanium, titanium nitride or titanium carbonitride membrane is formed on the alumina surface. Solid conducting material is set on the membrane between the two poles. The content of the capacitor in this invention is large, ESR is low, life is long, capability is reliable, it can be widely applied to modern communication, computer, and high performance civil and military digital product.

Description

technical field [0001] The invention relates to a coiled solid electrolytic capacitor, in particular to a coiled solid electrolytic capacitor using carbon-coated aluminum surface or titanium as cathode aluminum foil and a manufacturing method thereof. Background technique [0002] Capacitor is a basic electronic component, which is widely used in various electronic products. In recent years, with the rapid development of the electronic industry, electronic products have shown a trend of miniaturization and light weight, especially the emergence of digital products and personal computers. In order to meet the high-speed requirements, the capacitors used in it are required to be miniaturized, large-capacity, and low-impedance in the high-frequency region. [0003] For conductive polymer solid electrolytic capacitors, its capacity and impedance are closely related to the closeness and contact area between the solid electrolyte and the aluminum foil. The tighter the solid electr...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/00H01G9/02H01G9/08H01G9/15
Inventor 纪力荣
Owner STARZEON ELECTRONICS DONGGUAN
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