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Supercapacitor electrode corrosion-resistant conductive coating

A supercapacitor, anti-corrosion and conductive technology, applied in the direction of anti-corrosion coatings, conductive coatings, capacitors, etc., can solve the problems of acid and alkali corrosion resistance, narrow use margin, slow drying speed, etc., to prevent corrosion, increase surface area, dry fast effect

Active Publication Date: 2010-12-01
SHANGHAI HANBO ENTERPRISE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a kind of supercapacitor electrode anticorrosion conductive coating, to fill the blank of supercapacitor electrode material anticorrosion conductive coating in the prior art, at the same time overcome the conductivity difference in existing supercapacitor electrode conductive coating products, not good Defects such as acid and alkali corrosion resistance, poor adhesion, slow drying speed, and narrow use margin

Method used

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  • Supercapacitor electrode corrosion-resistant conductive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1) Formulation:

[0051] Graphite 22wt%

[0052] Sodium carboxymethylcellulose 2.0wt%

[0053] Colloidal silicon dioxide 8.3wt%

[0054] Neutralizing amine 2.5wt%

[0055] Pure water 65.2wt%

[0056] The particle size of graphite in the above formula is less than 3 μm, wherein the particle size between 0.1-2 μm accounts for 48-55 wt % of the total graphite, and the particle size smaller than 0.1 μm accounts for 28-35 wt % of the total graphite.

[0057] 2) Preparation:

[0058] The above components are fully mixed, stirred evenly, added to a ball mill to debond and disperse, and after discharging, the supercapacitor electrode anti-corrosion conductive coating of the present invention is obtained. After testing, its performance parameters are as follows: solid content: 28.9wt%, viscosity (20±1°C), 72Pa.s, pH value: 8.50, relative density, 1.12g / cm 3 , 2.5cm interval average resistance 7Ω. Alkali resistance test: soak for 120 hours without foaming, peeling, corrosi...

Embodiment 2

[0060] 1) Formulation:

[0061] Carbon black 25wt%

[0062] -190 3.0wt%

[0063] Colloidal alumina 12wt%

[0064] Neutralizing amine 3.0wt%

[0065] Pure water 57wt%

[0066] The particle size of carbon black in the above formulation is less than 3 μm, wherein the particle size of 0.1-2 μm accounts for 48-55 wt % of the total carbon black, and the particle size of less than 0.1 μm accounts for 28-35 wt % of the total carbon black.

[0067] 2) Preparation:

[0068] The preparation method is the same as in Example 1. After testing, the performance parameters of the obtained supercapacitor electrode anti-corrosion conductive coating are as follows: solid content: 28.6wt%, viscosity (20±1°C), 73Pa.s, pH value is 8.20, relative density, 1.12g / cm 3 , 2.5cm interval average resistance 6Ω. Alkali resistance test: soak for 120 hours without foaming, peeling, corrosion, etc.; acid resistance test: soak for 32 hours without foaming, peeling, corrosion, etc.

Embodiment 3

[0070] 1) Formulation:

[0071] Activated carbon 24wt%

[0072] Sodium lignosulfonate 2.8wt%

[0073] Styrene Acrylic Emulsion 12wt%

[0074] Neutralizing amine 2.3wt%

[0075] Pure water 58.9wt%

[0076] The particle size of activated carbon in the above formula is less than 3 μm, wherein the particle size of 0.1-2 μm accounts for 48-55 wt % of the total activated carbon, and the particle size of less than 0.1 μm accounts for 28-35 wt % of the total activated carbon.

[0077] 2) Preparation:

[0078] The preparation method is the same as in Example 1. After testing, the performance parameters of the obtained supercapacitor electrode anti-corrosion conductive coating are as follows: solid content: 28.8wt%, viscosity (20±1°C), 75Pa.s, pH value is 8.60, relative density, 1.12g / cm 3 , 2.5cm interval average resistance 8Ω. Alkali resistance test: soak for 120 hours without foaming, peeling, corrosion, etc.; acid resistance test: soak for 32 hours without foaming, peeling, c...

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Abstract

The invention discloses a supercapacitor electrode corrosion-resistant conductive coating, which comprises the following components in percentage by weight: 10 to 35 percent of conductive agent, 0.1 to 3.5 percent of dispersing agent, 2.0 to 15 percent of binder, 0.1 to 8.0 percent of pH regulator, and 50 to 70 percent of pure water. The supercapacitor electrode corrosion-resistant conductive coating is prepared by the following steps of: fully mixing and uniformly stirring the components, adding the components into a ball mill for peptizing and dispersing, and discharging to obtain the supercapacitor electrode corrosion-resistant conductive coating. Compared with the conventional like products at home and abroad, the supercapacitor electrode corrosion-resistant conductive coating has the advantages of greatly improving the acid and alkali corrosion resistance, having no bubbles, falling off, corrosion and other phenomena after being soaked in alkaline solution for 120 hours and in acid solution for 32 hours, and improving the conductivity, adhesiveness and drying speed. The product can be diluted and adjusted according to need during use.

Description

technical field [0001] The invention relates to conductive coatings, in particular to an anti-corrosion conductive coating for supercapacitor electrodes. Background technique [0002] Supercapacitors belong to electric double layer capacitors. The basic principle is the same as other types of electric double layer capacitors. They use the electric double layer structure composed of activated carbon porous electrodes and electrolytes to obtain super large capacity. A supercapacitor can be regarded as two unrelated porous plates separated by an electrolyte when a voltage is applied to the two plates. The potential applied to the positive plate attracts the negative ions in the electrolyte, while the negative plate potential attracts the positive ions, effectively creating two charge reservoirs, separating one layer at the positive plate and another layer at the negative plate. The commonality of all supercapacitors is that they all contain a positive electrode, a negative ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D1/04C09D133/00C09D125/14C09D5/24C09D5/08H01G9/042
CPCY02E60/13
Inventor 黄伟国
Owner SHANGHAI HANBO ENTERPRISE
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