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A kind of preparation method of lead-carbon composite material

A composite material, lead-carbon technology, applied in lead-acid batteries, structural parts, electrical components, etc., can solve the problem of not significantly improving the mixing uniformity, achieve inhibition of negative electrode sulfation, improve high-current charge-discharge performance, prolong The effect of cycle life

Active Publication Date: 2019-04-16
宁波中科孚奇能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the mixing uniformity of lead powder and carbon material to a certain extent compared with dry mixing or wet mixing methods, but it does not significantly improve the mixing uniformity of the two.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the lead-carbon composite material of the present embodiment comprises the following steps:

[0031] (1) Mix carbon materials, additives and water, and stir magnetically for 10 minutes to obtain a mixed sol; the ratio of the total mass of carbon materials and additives to the mass of water is 1:1.5; the amount of water added is 10% of the mass of lead powder;

[0032] The carbon material of this embodiment includes activated carbon and conductive agent, and the specific surface area of ​​activated carbon is 1500~3000m 2 / g, the addition of activated carbon is 4% of the lead powder quality; the conductive agent is acetylene black, and the addition of the conductive agent is 1% of the lead powder quality;

[0033] Additives include hydrogen evolution inhibitor, adhesive and expansion agent. The hydrogen evolution inhibitor is indium oxide, and the amount of hydrogen evolution inhibitor added is 0.01% of the mass of lead powder; the adhesive is sh...

Embodiment 2

[0038] The preparation method of the lead-carbon composite material of the present embodiment comprises the following steps:

[0039] (1) Mix carbon materials, additives and water, and stir magnetically for 60 minutes to obtain a mixed sol; the ratio of the total mass of carbon materials and additives to the mass of water is 1:4.5; the amount of water added is 11% of the mass of lead powder;

[0040] The carbon material of this embodiment includes activated carbon and conductive agent, and the specific surface area of ​​activated carbon is 1500~3000m 2 / g, the addition of activated carbon is 8% of the lead powder quality; the conductive agent is acetylene black and graphite, and the addition of the conductive agent is 2% of the lead powder quality;

[0041] Additives include hydrogen evolution inhibitors, adhesives and expansion agents, hydrogen evolution inhibitors are gallium oxide, and the amount of hydrogen evolution inhibitors added is 0.05% of the mass of lead powder; ad...

Embodiment 3

[0046] The preparation method of the lead-carbon composite material of the present embodiment comprises the following steps:

[0047] (1) Mix carbon materials, additives and water, and stir magnetically for 50 minutes to obtain a mixed sol; the ratio of the total mass of carbon materials and additives to the mass of water is 1:3; the amount of water added is 10% of the mass of lead powder;

[0048]The carbon material of this embodiment includes activated carbon and conductive agent, and the specific surface area of ​​activated carbon is 1500~3000m 2 / g, the addition of activated carbon is 6% of the lead powder quality; the conductive agent is carbon nanotubes, and the addition of the conductive agent is 2% of the lead powder quality;

[0049] Additives include hydrogen evolution inhibitors, adhesives and expansion agents. The hydrogen evolution inhibitors are bismuth oxide, and the amount of hydrogen evolution inhibitors added is 0.02% of the lead powder mass; The addition am...

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Abstract

The invention relates to a lead-carbon composite material preparation method. The method includes: mixing carbon materials, additives and water by a certain proportion to obtain mixed sol, atomizing the sol, and controlling flow of lead powder and atomized carbon materials to enable lead granules to be uniformly coated with the atomized carbon materials. Uniform mixing of the lead powder and the carbon materials are realized in a micron level, the problem that carbon materials in the prior art are prone to agglomeration and difficult to be well mixed with lead powder is thoroughly avoided, a uniformly mixed lead-carbon composite material is obtained, the problem of nonuniformity in mixing of the lead powder and the carbon materials is effectively solved, and inhabitation of cathode sulfation, prolonging of battery cycle life and improvement of high-current charge-discharge properties are realized. The lead-carbon composite material can be directly applied to cathode lead plaster of lead-carbon batteries and is capable of effectively giving play to supercapacitance characteristics of the carbon materials, buffering high-current charge and discharge of the batteries, effectively inhibiting cathode sulfation and prolonging cycle lives of the batteries.

Description

technical field [0001] The invention relates to a preparation method of a lead-carbon composite material. Background technique [0002] In the existing lead-carbon batteries, there are two main methods of mixing lead powder with carbon materials and additives: [0003] (1) Dry mixing: that is, first mix lead powder and carbon materials, and add other additives, and then add water and acid to mix; [0004] (2) Wet mixing: that is, carbon materials such as activated carbon and some additives are first prepared into a suspension solution, and then mixed with lead powder. [0005] However, the above two methods are difficult to achieve uniform mixing of lead powder and carbon materials, and cannot effectively exert some excellent properties of carbon materials such as supercapacitive characteristics and high conductivity. [0006] The Chinese invention patent application "A lead-carbon composite material electrodeposition device" (application number: CN201410147584.5) with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/57H01M4/62H01M10/06
CPCH01M4/366H01M4/57H01M4/628H01M10/06Y02E60/10
Inventor 田中和项裕桥王建新
Owner 宁波中科孚奇能源科技有限公司