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Lead-carbon composite material

A composite material, lead-carbon technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of difficult uniform dispersion, large specific surface area of ​​carbon materials, and reduced service life, and achieve tight interface bonding, enhanced interface bonding, and inhibition Shedding effect

Active Publication Date: 2011-05-25
ZHUZHOU SMELTER GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the so-called super battery obtained by using activated carbon with a high specific surface area to mix with the negative active material of the lead-acid battery to prepare the negative electrode through simple physical mixing is actually difficult to play a super role.
On the one hand, due to the large specific surface area and low density of carbon materials, it is difficult to mix evenly with the negative electrode active material with a large specific gravity, and it is difficult to achieve uniform dispersion of carbon materials in the negative electrode paste of lead-acid batteries.
On the other hand, there is a significant difference in surface properties between the activated carbon material with a high specific surface area and the surface of the lead powder used to make the negative electrode paste. The interfacial bonding ability after mixing is very poor. , causing the negative active material to detach prematurely, and the life span is significantly reduced

Method used

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Examples

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Effect test

Embodiment 1

[0030] Weigh 6g to have a specific surface area of ​​50 m 2 / g and 24g specific surface area is 3000 m 2 Grind activated carbon, 3g carbon black, and 3g PVDF in a mortar and mix evenly, add 13g toluene to dissolve and make a paste, apply it evenly on the lead plate, and put it in a vacuum drying oven at a temperature of 50°C Dry under conditions for 2 hours. Take out the activated carbon plate and place it in a lead acetate solution with a concentration of 0.05mol / L and soak for 10 minutes. The lead plate is used as the positive electrode, the activated carbon plate is used as the negative electrode, and the lead acetate solution is used as the electroplating solution for electrodeposition. The electroplating current density is controlled at 10 mA / cm 2 , the electrodeposition time is 10s, and the obtained lead-carbon composite material is dried in a vacuum oven at 55°C for 4 hours, and the dried product is scraped off the lead plate to obtain the lead-carbon composite materia...

Embodiment 2

[0032] Weigh 64g specific surface area is 200 m 2 / g and 16g specific surface area is 1000 m 2 Grind activated carbon, 10g carbon black, and 10g PTFE in a mortar and mix evenly, add 30g nitrogen methyl pyrrolidone to dissolve and make a paste, apply it evenly on a titanium plate, and put it in a vacuum oven. Dry at 60°C for 8 hours. Take out the activated carbon plate and place it in a lead nitrate solution with a concentration of 2mol / L and soak for 30 minutes. The lead plate is used as the positive electrode, the activated carbon plate is used as the negative electrode, and the lead nitrate solution is used as the electroplating solution for electrodeposition. The electroplating current density is controlled at 500 mA / cm 2 , the electrodeposition time is 500s, and the obtained lead-carbon composite material is dried in a vacuum oven at 80°C for 8 hours, and the dried product is scraped off the titanium plate to obtain the lead-carbon composite material, and the obtained lea...

Embodiment 3

[0034] Weigh 20g specific surface area is 600 m2 / g and 20g specific surface area is 1900 m 2 Grind activated carbon, 8g carbon black, and 9g neoprene rubber in a mortar and mix evenly, add 20g N,N dimethylformamide to dissolve and adjust to a paste, apply it evenly on the lead plate, put Put it into a vacuum drying oven, and dry it for 6 hours at a temperature of 55°C. Take out the activated carbon plate and place it in a concentration of 1.2mol / L lead fluoroborate solution for 20 minutes. The lead plate is used as the positive electrode, the activated carbon plate is used as the negative electrode, and the lead fluoroborate solution is used as the electroplating solution for electrodeposition. The electroplating current density is controlled at 50 mA / L. cm 2 , the electrodeposition time is 60s, and the obtained lead-carbon composite material is dried in a vacuum oven at 70°C for 6 hours, and the dried product is scraped off the lead plate to obtain the lead-carbon composite...

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Abstract

The invention relates to a lead-carbon composite material, which is prepared by depositing lead inside active carbon particles and among active carbon particles through an electrolytic deposition method. The lead is 5 to 65 mass percent of the lead-carbon composite material, and grows in a polyhedral particle shape from holes of the active carbon so as to achieve good interfacial bond of the lead and the carbon. The lead-carbon composite material has larger specific gravity, and is more easily mixed with anode active materials of a lead-acid storage battery, such as lead powder and the like uniformly. The lead-carbon composite material has the specific capacitance of 72 to 115F / g in sulfuric acid electrolyte with the density of 1.28g / m<3>, so the lead-carbon composite material can directly serve as an anode material of an ultrabattery, or serve as the anode active material of the ultrabattery to be applied to ultrabattery manufacture.

Description

technical field [0001] The invention belongs to the field of activated carbon hybrid materials, in particular to a lead-carbon composite material. Background technique [0002] Lead-acid batteries have played a positive role in promoting the development of industry and the progress of mankind in the course of more than 100 years of historical development. Today, the application of lead-acid batteries is more extensive. Especially in recent years, with the aggravation of environmental pollution and energy crisis, higher requirements have been put forward for batteries. Super lead-acid batteries with long life, large capacity, stable performance and convenient use have been developed. Storage battery has always been a frontier topic in the field of battery research and manufacturing. In addition, lead-acid batteries have always occupied an important position in the secondary battery industry because of their cheap price, easy-to-obtain raw materials, and reliable performance....

Claims

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Application Information

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IPC IPC(8): H01M4/56
CPCY02E60/12Y02E60/10
Inventor 石光李正明张德晶陈红雨王辉
Owner ZHUZHOU SMELTER GRP
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