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Microwave preparation method for carbon-coated lead powder composite for lead-carbon super batteries

A composite material and super battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of uneven mixing of carbon materials and lead powder, poor mechanical strength of the negative plate, and inability to give full play to the advantages, etc., to achieve high current Long charge and discharge life, improved cycle life, and large mass-to-power effects

Active Publication Date: 2015-01-14
TIANNENG BATTERY GROUP +1
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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 play to their respective advantages, and the mechanical strength of the negative plate is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 1kg of glucose and 5kg of lead powder, make a solution of glucose, then add lead powder, stir to make a uniform paste mixture, and 2 Microwave carbonization was carried out in the air; the microwave carbonization conditions used were: microwave power 750W, carbonization time 40min; after the product was cooled, the product was washed alternately with absolute ethanol and deionized water four times, dried in vacuum at 50°C for 8h, and vacuum is 100kPa, and a carbon-coated lead powder composite material is obtained. After testing, the carbon content in the composite material is about 7% (mass fraction).

[0023] 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 ...

Embodiment 2

[0026] Weigh 0.5kg of glucose and 5kg of lead powder, make a solution of glucose, then add lead powder, stir to make a uniform paste mixture, and 2 Microwave carbonization was carried out in the air; microwave carbonization conditions used: microwave power 700W, carbonization time 30min; after the product was cooled, the product was washed alternately with absolute ethanol and deionized water four times, vacuum dried at 40°C for 10h, and vacuum is 90kPa, and a carbon-coated lead powder composite material is obtained. After testing, the carbon content in the composite material is about 3.7% (mass fraction).

[0027] The above-mentioned carbon-coated lead powder composite material was used to fabricate a lead-carbon super battery, and the fabrication method was the same as in 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. The charging and discharging cycle is adopted in the following...

Embodiment 3

[0029] Weigh 0.9kg of sucrose and 5kg of lead powder, make a solution of sucrose, then add lead powder, stir to form a uniform paste mixture, and carry out microwave carbonization in an Ar atmosphere; the microwave carbonization conditions used: microwave power is 750W, carbonization The time is 30 minutes; after the product is cooled, the product is alternately washed four times with acetone and deionized water, and vacuum-dried at 50° C. for 7 hours at 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 6.7% (mass fraction).

[0030] The above-mentioned carbon-coated lead powder composite material was used to fabricate a lead-carbon super battery, and the fabrication method was the same as in Example 1. After testing, the mass specific power of the lead-carbon super battery is 15% higher than that of the existing lead-acid battery. The charge and discharge cycle is adopted i...

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Abstract

The invention discloses a microwave preparation method for a carbon-coated lead powder composite for lead-carbon super batteries. The method includes: weighing carbonhydrate and lead powder, making the carbonhydrate into solution or sol, adding the lead powder, stirring to obtain uniform paste mixture, and carbonizing the paste mixture by the microwave method while using shielding gas during carbonization to enable lead powder composite to be coated by carbon; and using organic solvent and deionized water to alternatively wash the coated composite, and vacuum drying to obtain the carbon-coated lead powder composite. Large-current charge-discharge cycle life and mass ratio power of lead-carbon super batteries made of the carbon-coated lead powder composite are evidently improved as compared with those of existing lead-acid batteries.

Description

technical field [0001] 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 [0002] 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 batteries in aut...

Claims

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Application Information

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IPC IPC(8): H01M4/38
CPCY02E60/10
Inventor 舒东张天任唐少青赵海敏王永胜陈红雨朱健高根芳
Owner TIANNENG BATTERY GROUP
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