Solid capacitor carbon foil nano conductive carbon paste and preparation method thereof

A nano-conducting, solid-state capacitor technology, used in cable/conductor manufacturing, capacitors, electrolytic capacitors, etc., can solve the problems of limited acid resistance and oxidation resistance, rough adhesion of interface bonding, and easy occurrence of microscopic cracks, so as to avoid agglomeration. , The effect of reducing particle spacing and preventing oxidation or corrosion

Active Publication Date: 2020-05-05
南通宇华新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conductive carbon paste in the prior art generally uses non-metallic conductor carbon stream particles to be distributed in thermoplastic dispersant solvents. When the proportion of non-conductive components in the matrix of conductive particles reaches a predetermined limit, the conductive particles contact each other to form conductive channels, rubbing resistance The rate drops suddenly, and with the increase of conductive particles, the distance between particles is furt

Method used

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  • Solid capacitor carbon foil nano conductive carbon paste and preparation method thereof
  • Solid capacitor carbon foil nano conductive carbon paste and preparation method thereof

Examples

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Example Embodiment

[0019] Example 1:

[0020] A preparation method of solid capacitor carbon foil nano conductive carbon paste, wherein the preparation method is as follows:

[0021] (1) Soak carbon nanotubes in a mixture of concentrated nitric acid and concentrated sulfuric acid for 1.5 hours, wash with deionized water until neutral, dry to obtain acidified carbon nanotubes, and then mix with carbon nanotubes at a mass ratio of 2:1 Uniform, get nano conductive carbon fiber system;

[0022] (2) Take diethylene glycol butyl ether, polyoxyethylene alkylphenyl ether, methyl benzyl alcohol, N,N-dimethylacetamide and terpineol in a mass ratio of 3:1:3:2:1 , sequentially added to the stirring tank, at a stirring speed of 88r / min and a temperature of 42°C, stirring and mixing for 30 minutes to obtain a polymer solvent;

[0023] (3) Add binder accounting for half of the total binder volume into the polymer solvent, stir and mix for 0.6h at a stirring speed of 53r / min, then add the nano-conductive carb...

Example Embodiment

[0026] Example 2:

[0027] A preparation method of solid capacitor carbon foil nano conductive carbon paste, wherein the preparation method is as follows:

[0028] (1) Take carbon nanotubes and place them in a mixture of concentrated nitric acid and concentrated sulfuric acid for acidification for 1 hour, wash with deionized water until neutral, dry to obtain acidified carbon nanotubes, and then mix them with carbon nanotubes at a mass ratio of 2:1. , to obtain nano-conductive carbon fiber system;

[0029] (2) Take diethylene glycol butyl ether, N,N-dimethylacetamide and terpineol in a mass ratio of 3:2:1, and add them to the stirring tank in turn. When the stirring speed is 100r / min, the temperature At 44°C, stir and mix for 30 minutes to obtain a polymer solvent;

[0030] (3) Add binder accounting for half of the total binder volume into the polymer solvent, stir and mix for 0.9h at a stirring speed of 52r / min, then add the nano-conductive carbon fiber system, the mass of ...

Example Embodiment

[0033] Example 3:

[0034] A preparation method of solid capacitor carbon foil nano conductive carbon paste, wherein the preparation method is as follows:

[0035] (1) Take carbon nanotubes and place them in a mixture of concentrated nitric acid and concentrated sulfuric acid for acidification for 2 hours, wash with deionized water until neutral, dry to obtain acidified carbon nanotubes, and then mix them with carbon nanotubes at a mass ratio of 2:1. , to obtain nano-conductive carbon fiber system;

[0036] (2) Take polyoxyethylene alkylphenyl ether, methyl benzyl alcohol, and N,N-dimethylacetamide in a mass ratio of 1:3:2 and add them to the stirring tank in sequence. Stir and mix for 30 minutes at 41°C to obtain a polymer solvent;

[0037] (3) Add binder accounting for half of the total binder volume in the polymer solvent, stir and mix for 0.8h at a stirring speed of 57r / min, then add the nano-conductive carbon fiber system, the mass of the nano-conductive carbon fiber sy...

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Abstract

The invention relates to solid capacitor carbon foil nano conductive carbon paste and a preparation method thereof. The solid capacitor carbon foil nano conductive carbon paste comprises a polymer carrier and a nano conductive carbon fiber system dispersed in the polymer carrier, wherein the polymer carrier is formed by mixing an adhesive, a polymer solvent and a processing aid; the nano conductive carbon fiber system comprises a carbon nano tube and an acidified carbon nano tube acidified by a mixed solution of concentrated nitric acid and concentrated sulfuric acid; the adhesive is one or more of polyester acrylic resin, waterborne polyurethane resin, epoxy acrylic resin and polyurethane resin; the polymer solvent is several in butyl cellosolve, polyoxyethylene alkyl phenyl ether, methylbenzyl alcohol, N, N-dimethylformamide and terpilenol. The nano conductive carbon fiber system is dispersed in the polymer carrier, so that the microscopic coverage compactness of a carbon layer is improved; and the solid capacitor carbon foil nano conductive carbon paste is suitable for a solid capacitor carbon foil, protects a current collector, prevents the surface of the aluminum foil from being oxidized or corroded, and greatly reduces the ESR of a solid capacitor.

Description

technical field [0001] The invention relates to a solid capacitor carbon foil nano conductive carbon paste and a preparation method thereof, belonging to the technical field of solid capacitor carbon foil. Background technique [0002] Solid capacitors are also called solid aluminum electrolytic capacitors. The biggest difference between them and ordinary liquid aluminum electrolytic capacitors is that they use different dielectric materials. The dielectric material of liquid aluminum capacitors is electrolyte, while the dielectric material of solid capacitors is conductive. Permanent polymer, will not interact with alumina, will not explode after electrification, has low ESR and high rated ripple current and is widely used. The solid capacitor cathode foil is made of conductive paste attached to the surface of corroded aluminum foil. Therefore, the uniformity, stability and continuity of the conductive paste are directly related to the surface quality of the finished carbon...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01B1/24H01B13/00
CPCH01B1/24H01B13/00H01G9/042
Inventor 焦露萍黄祖琼吴子正
Owner 南通宇华新材料科技有限公司
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