Lead-carbon composite material, and preparation method and application thereof

A composite material, lead-carbon technology, used in hybrid capacitor electrodes, electrical components, battery electrodes, etc., can solve the problem of difficult to form porous carbon materials, achieve inhibition of negative electrode sulfation, improve capacitance characteristics, and reduce electrode polarization. Effect

Active Publication Date: 2014-07-23
TIANNENG BATTERY GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can realize the preparation of carbon-coated lead powder composite materials at a lower temperature, it needs a protective gas and is not easy to form porous carbon materials.

Method used

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  • Lead-carbon composite material, and preparation method and application thereof
  • Lead-carbon composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Dissolve 10.5kg of glucose in 100L of deionized water, then add 50kg of lead powder to the solution, mix in a ball mill at 100r / min for 1h, move the mixture into a vacuum drying oven, and dry at 50°C for 4h at a vacuum of 50kpa , to form a uniformly dispersed mixture, and then, while stirring, add 15L of 98% (mass fraction) concentrated sulfuric acid to the mixture at a rate of 1L / min, stir for half an hour, and let it stand at 50°C for 8 hours. The product was alternately washed four times with absolute ethanol and deionized water, dried in vacuum at 55° C. for 8 hours, and the vacuum degree was 100 kPa to obtain a lead-carbon composite material. After testing, the carbon content in the composite material is about 18% (mass fraction).

[0041] figure 1 Shown is the scanning electron microscope picture of the lead-carbon composite material. In the figure, the lead particles present a regular polyhedral structure and are uniformly dispersed around the carbon. The two ar...

Embodiment 2

[0046] Dissolve 10.5kg of glucose in 100L of deionized water, then add 50kg of lead powder to the solution, mix in a ball mill at 100r / min for 1h, move the mixture into a vacuum drying oven, and dry for 4h at 60°C with a vacuum of 50kpa , to form a mixture, then add 20L of 93% concentrated sulfuric acid to the mixture at a rate of 1L / min, stir for half an hour, leave to react at 50°C for 8 hours, wash the product four times alternately with absolute ethanol and deionized water, Vacuum drying at 55° C. for 8 hours with a vacuum degree of 100 kPa to obtain a lead-carbon composite material. After testing, the carbon content in the composite material is about 15% (mass fraction).

[0047] figure 2 Shown is the scanning electron microscope picture of the lead-carbon composite material. In the figure, the lead particles present a regular polyhedral structure and are evenly dispersed around the carbon. The two are in close contact, but not aggregated.

[0048] The above-mentioned ...

Embodiment 3

[0050] Dissolve 10.5kg of fructose in 100L of deionized water, then add 50kg of lead powder to the solution, mill in a ball mill at 150r / min for 1h, move the mixture into a vacuum drying oven, and dry at 60°C for 4h at a vacuum of 50kpa , to form a uniformly dispersed mixture, then add 20L of 93% concentrated sulfuric acid to the mixture at a rate of 1.5L / min, stir for 20 minutes, let it stand at 60°C for 8 hours, and wash the mixture alternately with absolute ethanol and deionized water The product was dried four times in vacuum at 55° C. for 8 hours with a vacuum degree of 100 kPa to obtain a lead-carbon composite material. After testing, the carbon content in the composite material is about 19% (mass fraction).

[0051] SEM images (not provided) of the lead-carbon composite with figure 1 , figure 2 Similarly, the lead particles present a regular polyhedral structure and are evenly dispersed around the carbon, and the two are in close contact, but not aggregated.

[0052...

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Abstract

The invention discloses a lead-carbon composite material, and a preparation method and an application thereof. The preparation method comprises the following steps: processing an organic carbon source to prepare a solution, adding lead powder, grinding, uniformly mixing, and drying to obtain mixed powder; and adding concentrated sulfuric acid to the mixed powder under stirring, allowing the obtained solution to stand for carbonization for a period of time, washing, and drying to prepare the lead-carbon composite material, wherein the mass fractions of carbon and lead in the lead-carbon composite material are 0.1-25% and 75-99.9% respectively. The invention also discloses the lead-carbon composite material prepared through the preparation method, and the application of the composite material. The method has the advantages of simplicity, low cost and low energy consumption, and lead carbon batteries made by using the composite material have substantially longer heavy current charge and discharge life and higher mass specific power than present lead acid storage batteries.

Description

technical field [0001] The invention belongs to the field of chemical power sources, in particular to a lead-carbon composite material and its preparation method and application. Background technique [0002] The currently commonly used secondary chemical power sources mainly include lead-acid batteries, lithium-ion batteries, nickel-metal hydride batteries, fuel cells, nickel-cadmium batteries, and supercapacitors. These power sources have their own advantages and disadvantages. Lead-acid batteries have a history of more than 150 years since they were invented. Because of their mature technology, high cost performance, large capacity, good safety performance, and good circular economic benefits, they have become the battery with the largest output and the widest range of applications in the world. However, due to the disadvantages of low specific power and short cycle life, lead-acid batteries have become a bottleneck for the further development of lead-acid batteries. Esp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/57H01G11/30
CPCH01G11/30H01M4/362H01M4/57H01M4/583Y02E60/10
Inventor 施利勇龙璐张天任舒东朱健邹献平方学明程红红吴金清
Owner TIANNENG BATTERY GROUP
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