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Preparation method of high-conductivity carbon black composite material used in air electrode

A composite material, air electrode technology, applied in the field of electrochemical technology and battery manufacturing, can solve the problems of poor air permeability, poor waterproofness, poor conductivity, etc., and achieve the effect of overcoming poor air permeability, good waterproofness, and good conductivity

Inactive Publication Date: 2013-09-18
刘伟春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that there are at least defects such as poor air permeability, poor waterproofness and poor electrical conductivity in the prior art.

Method used

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  • Preparation method of high-conductivity carbon black composite material used in air electrode
  • Preparation method of high-conductivity carbon black composite material used in air electrode
  • Preparation method of high-conductivity carbon black composite material used in air electrode

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Embodiment 1

[0034] According to an embodiment of the present invention, a method for preparing a high-conductivity carbon black composite material for an air electrode is provided. This example includes:

[0035] (1) Using a vacuum pump, the raw materials comprising at least the following components and mass ratios are sucked into the reactor, and mixed and stirred at a speed of 30 rpm under normal temperature conditions:

[0036] Carbon black: 50 parts;

[0037] Hot melt: 25 parts;

[0038] Polymer resin: 20 parts;

[0039] Pore-forming agent: 5 parts;

[0040] (2) After mixing and stirring for 30 minutes, heat up to 130°C at a rate of 5°C / min, and keep the temperature constant for 30 minutes to melt evenly;

[0041] (3) Use a condenser to discharge the liquid in the reactor, raise the temperature to 250°C at a rate of 2°C / min, and stir at a constant temperature for 30 minutes, then keep the constant temperature, let the reactor work continuously for 3 hours, and cool it naturally to...

Embodiment 2

[0050] Different from the above-mentioned embodiments, in this embodiment, the preparation method of the high-conductivity carbon black composite material for the air electrode includes:

[0051](1) Using a vacuum pump, the raw materials comprising at least the following components and mass ratios are sucked into the reactor, and mixed and stirred under normal temperature conditions:

[0052] Carbon black: 60 parts;

[0053] Hot melt: 20 parts;

[0054] Polymer resin: 10 parts;

[0055] Pore-forming agent: 10 parts;

[0056] (2) After mixing and stirring for 50 minutes, heat up to 80-130°C at a rate of 1°C / min, and keep the temperature constant for 50 minutes to melt evenly;

[0057] (3) Use a condenser to discharge the liquid in the reactor, raise the temperature to 100-250°C at a rate of 1°C / min, and stir at a constant temperature for 1 hour, then keep the constant temperature, make the reactor work continuously for 3 hours, and cool it down to normal temperature naturall...

Embodiment 3

[0061] Different from the above-mentioned embodiments, in this embodiment, the preparation method of the high-conductivity carbon black composite material for the air electrode includes:

[0062] (1) Using a vacuum pump, the raw materials comprising at least the following components and mass ratios are sucked into the reactor, and mixed and stirred under normal temperature conditions:

[0063] Carbon black: 55 parts;

[0064] Hot melt: 22.5 parts;

[0065] Polymer resin: 15 parts;

[0066] 7.5 parts of pore-forming agent;

[0067] (2) After mixing and stirring for 50 minutes, heat up to 100°C at a rate of 3.5°C / min, and keep the temperature constant for 40 minutes to melt evenly;

[0068] (3) Use a condenser to discharge the liquid in the reactor, raise the temperature to 125°C at a rate of 1.5°C / min, and keep stirring at a constant temperature for 45 minutes, then keep the constant temperature, let the reactor work continuously for 3 hours, and cool naturally to room tempe...

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Abstract

The invention discloses a preparation method of a high-conductivity carbon black composite material used in an air electrode. The method comprises the steps that: with a vacuum pump, 50-60 parts of carbon black, 20-25 parts of a thermal flux, 10-20 parts of high-molecular resin, and 5-10 parts of a pore-forming agent are absorbed into a reaction kettle; the materials are mixed and stirred for 30-50min under normal temperature; the temperature is increased to 80-130 DEG C with a speed of 1-5 DEG C / min and is maintained for 30-50min; liquid in the reaction kettle is discharged by using a condenser; the temperature is increased to 100-250 DEG C with a speed of 1-2 DEG C / min, and constant-temperature stirring is carried out for 30-60min; the mixture is naturally cooled to normal temperature; under a condition of 1-4Mpa, rest of the solvent in the reaction kettle is removed by pump-filtration; high-pressure air with a pressure of 10-20Mpa is delivered in; a solid mixed material obtained in the reaction kettle is crushed for 20-40min by using air flow cyclone; and vacuum pumping is carried out, such that the conductive carbon black composite material is obtained. The preparation method has the advantages of good air permeability, good water resistance, good conductivity, and good environment friendliness.

Description

technical field [0001] The invention relates to the fields of electrochemical technology and battery manufacturing technology, in particular to a method for preparing a high-conductivity carbon black composite material for an air electrode. Background technique [0002] At present, in the field of electrochemical technology and battery manufacturing technology, metal-air batteries have high mass-specific energy and mass-specific power, so it has a broad potential market. There are many types of metal-air batteries, but zinc-air batteries are the most attractive in terms of applicability and price of recyclable electrode materials. [0003] Zinc-air batteries have the advantages of large capacity, high specific energy, low cost, and stable discharge, and are a chemical power source with huge market prospects. According to predictions by relevant experts, it is cheaper than fuel cells in the general sense and has the shortest path to commercialization. [0004] However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M12/02
CPCY02E60/10
Inventor 刘伟春
Owner 刘伟春