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A kind of solid capacitor negative electrode carbon foil and its preparation method and a solid capacitor and its preparation method

A capacitor and solid-state technology, applied in the field of capacitors, can solve the problems of high energy consumption, complex preparation process, safety and environmental protection problems, etc., and achieve the effects of low ESR value, high capacity and low loss.

Active Publication Date: 2020-05-05
深圳市金富康电子有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The negative electrode foil of this structure contains a transition metal layer, which leads to complicated preparation process, high energy consumption, and heat treatment must be carried out in a specific gas, which has safety and environmental protection problems, which is not conducive to the industrial promotion of this negative electrode foil.

Method used

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  • A kind of solid capacitor negative electrode carbon foil and its preparation method and a solid capacitor and its preparation method

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preparation example Construction

[0037] The present invention also provides a method for preparing the negative electrode carbon foil of a solid capacitor described in the above technical solution, comprising the following steps:

[0038] Coating the conductive polymer dispersion on the upper and lower surfaces of the corroded aluminum foil, and after the first drying, a single conductive layer solid capacitor negative electrode foil is obtained;

[0039] Coating the conductive carbon paste on at least one surface of the negative electrode foil of the single conductive layer solid capacitor, so that the conductive carbon paste completely covers or covers at least one surface of the negative electrode foil of the single conductive layer solid capacitor, and after the second drying, a solid capacitor is obtained Negative electrode carbon foil;

[0040] Or replace the coating order of the poly-3,4-ethylenedioxythiophene dispersion and the conductive carbon paste.

[0041] In the present invention, the specific ...

Embodiment 1

[0089] (1) With a specific volume of 450μF / cm 2 , The corroded aluminum foil with a thickness of 50 μm is the negative electrode foil substrate, and the poly-3,4-ethylenedioxythiophene dispersion is coated on the surface of the negative electrode foil substrate by gravure coating technology, and the coating density is 30g / m 2 , after drying at 85°C, a negative electrode foil whose surface is covered with a poly-3,4-ethylenedioxythiophene conductive layer is obtained; the poly-3,4-ethylenedioxythiophene dispersion is self-made, wherein The concentration is 0.5wt.%, wherein the binder is polyvinyl alcohol, the concentration is 3wt.%; the thickness of the poly 3,4-ethylenedioxythiophene conductive layer is 2 μm;

[0090] (2) Gravure coating technology is used to coat a layer of conductive graphene slurry on the surface of the negative electrode foil coated with poly-3,4-ethylenedioxythiophene conductive layer, and the density of the coating is 25g / m 2 , after drying at 100°C, a ...

Embodiment 2

[0099] (1) With a specific volume of 450μF / cm 2 , a corroded aluminum foil with a thickness of 50 μm is the negative electrode foil substrate, and the poly 3,4-ethylenedioxythiophene-polystyrene sulfonic acid dispersion is coated on the surface of the negative electrode foil substrate by gravure coating technology, and the coating density 10g / m 2 , after drying at 85°C, a negative electrode foil whose surface is coated with a poly 3,4-ethylenedioxythiophene-poly 3,4-ethylenedioxythiophene styrene sulfonic acid conductive layer is obtained; the poly 3,4-ethylenedioxythiophene - The polystyrene sulfonic acid dispersion is the model 1802007 dispersion produced by Bohong Company; the concentration of poly(3,4-ethylenedioxythiophene) is 1.5wt.%, and the binder is polyvinylpyrrolidone with a concentration of 5wt.%. , the thickness of the poly-3,4-ethylenedioxythiophene-polystyrenesulfonic acid conductive layer is 0.6 μm;

[0100] (2) Gravure coating technology is used to coat a la...

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Abstract

The invention provides a solid-state capacitor negative carbon foil comprising a corrosion aluminum foil and a conductive layer. The conductive layer wraps the surface of the corrosion aluminum foil.The conductive layer comprises a conductive high-molecular polymer layer and a carbon conductive layer. The conductive high-molecular polymer layer wraps the surface of the corrosion aluminum foil orthe surface of the corrosion aluminum foil coated with the carbon conductive layer. One conductive high-molecular polymer layer and one carbon conductive layer wrap the conventional corrosion aluminumfoil and the solid-state capacitor negative carbon foil having the simple structure is obtained, the solid-state capacitor negative carbon foil can be prepared by only using the conventional coatingmethod, and the solid-state capacitor prepared by using the negative foil has the advantages of high capacity, low loss and low ESR value.

Description

technical field [0001] The invention relates to the field of capacitors, in particular to a solid capacitor negative electrode carbon foil and a preparation method thereof, a solid capacitor and a preparation method thereof. Background technique [0002] Capacitors are composed of two electrodes and a dielectric material between them. They are mainly used for charge storage, filtering, coupling, tuning and oscillation. Specifically, the characteristics, functions and applications of capacitors with different structures are also different. Among them, the negative electrode carbon foil of solid aluminum electrolytic capacitors obtained by using aluminum foil as the base film and composite graphite layer on the surface has the advantage of high capacitance and has been widely used. and promotion. [0003] The negative electrode carbon foil of solid aluminum electrolytic capacitors currently used is mainly prepared by magnetron sputtering. Layer magnetron sputtering of a laye...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/055H01G9/15H01G13/00H01G13/04
CPCH01G9/042H01G9/055H01G9/151H01G13/00H01G13/003H01G13/04
Inventor 王兴久
Owner 深圳市金富康电子有限公司
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