Hydrothermal preparation method of carbon coated lead powder composite materials for lead carbon super batteries

A technology of composite materials and super batteries, applied in hybrid batteries, battery electrodes, secondary battery repair/maintenance, etc., can solve the problems of not giving full play to the advantages, poor mechanical strength of the negative plate, uneven mixing of carbon materials and lead powder, etc. question

Inactive Publication Date: 2012-07-25
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method, the mixing of carbon material and lead powder is not uniform enough to give full

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1.05g / cm 3 Glucose solution 14L, then add 5kg lead powder to the solution, ultrasonically disperse for 1 hour, move the mixture into a hydrothermal reaction kettle, react at 180°C for 14 hours, after the product is cooled, wash the product alternately with absolute ethanol and deionized water The product was dried four times in vacuum at 55° C. for 8 hours at a vacuum degree of 100 kPa to obtain a carbon-coated lead powder composite material. After testing, the carbon content in the composite material is about 8% (mass fraction).

[0022] Use the above-mentioned carbon-coated lead powder composite material to make lead-carbon super battery, the method is as follows: 98wt.% carbon-coated lead powder composite material, 0.3wt.% barium sulfate, 0.4wt.% sodium lignosulfonate, 0.1wt.% Acetylene black, 0.2wt.% short fiber and 1wt.% CMC are mixed evenly, then add 10% of the total mass of the above materials, 1.32 g / cm 3 Sulfuric acid and deionized water with 10% of the ...

Embodiment 2

[0025] Take 1.03g / cm 3 Glucose solution 14L, then add 5kg lead powder to the solution, ultrasonically disperse for 1 hour, move the mixture into a hydrothermal reaction kettle, react at 160°C for 20 hours, after the product is cooled, wash the product alternately with absolute ethanol and deionized water The product was dried four times in vacuum at 60° C. for 6 hours with a vacuum degree of 95 kPa to obtain a carbon-coated lead powder composite material. After testing, the carbon content in the composite material is about 4% (mass fraction).

[0026] Use the above-mentioned carbon-coated lead powder composite material to make a lead-carbon super battery, and the manufacturing method is the same Example 1 . After testing, the mass specific power of the lead-carbon super battery is 12% higher than that of the existing lead-acid battery. Charge and discharge cycle in the following way: 2C discharge for 20s — stop 10s — 1C charging 42s — stop 10s — 2C discharge for 20s, t...

Embodiment 3

[0028] Take 1.04g / cm 3 14L of sucrose solution, then add 5kg of lead powder to the solution, ultrasonically disperse for 1 hour, move the mixture into a hydrothermal reaction kettle, and react at 180°C for 18 hours. After the product is cooled, wash the product alternately with acetone and deionized water. The second time, vacuum-dried at 50°C for 8 hours, and the vacuum degree was 90kPa to obtain a carbon-coated lead powder composite material. After testing, the carbon content in the composite material is about 7.5% (mass fraction).

[0029] Use the above-mentioned carbon-coated lead powder composite material to make a lead-carbon super battery, and the manufacturing method is the same Example 1 . After testing, the mass specific power of the lead-carbon super battery is 14% higher than that of the existing lead-acid battery. Charge and discharge cycle in the following way: 2C discharge for 20s — stop 10s — 1C charging 42s — stop 10s — 2C discharge for 20s, the dischar...

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Abstract

The invention discloses a hydrothermal preparation method of carbon coated lead powder composite materials for lead carbon super batteries. Deionized water is added into carbohydrates to be prepared into solution or sol, lead powder is added for ultrasonic dispersion, the mixture is subjected to hydrothermal reaction so that the carbohydrates are carbonized to be coated on the surface of aluminum powder particles, original solvents and deionized water are used for alternately washing the coated materials, and the vacuum drying is carried out to obtain the carbon coated lead powder composite materials. The lead carbon super batteries made of the carbon coated lead powder composite materials have the advantage that the charging and discharging cyclic service life and the weight-to-power ratio are respectively and obviously prolonged and improved through being compared with those of the existing lead acid storage batteries.

Description

[0001] technical field [0002] The invention relates to the field of chemical power sources, in particular to a method for preparing a carbon-coated lead powder composite material used for a lead-carbon super battery. Background technique [0003] The currently commonly used secondary chemical power sources mainly include lead-acid batteries, lithium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries and supercapacitors, each of which has its own advantages and disadvantages. The advantages of the lead-acid battery itself make it last for 150 years, and it has always been the mainstream of the battery industry and is favored by many application fields. These advantages include low initial cost, mature technology, high safety, high cycle efficiency, etc. In the future competition of automotive power batteries, lead-acid batteries will become a strong competitor due to their own advantages. An important factor that restricts the use of lead-acid batteri...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M12/00H01M10/42
CPCY02E60/128Y02E60/10
Inventor 舒东唐少青张杰孙振杰
Owner SOUTH CHINA NORMAL UNIVERSITY
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