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Preparation method of graphene quantum dot composite material for lead-acid battery

A technology of graphene quantum dots and composite materials, which is applied in the field of preparation of graphene quantum dot composite materials for lead-acid batteries, and can solve the problems of easy softening and falling off of the active material of the plate, low utilization rate of the active material, and reduced service life. , to achieve the effect of inhibiting softening and falling off, reducing the loss of electrochemical specific capacity and improving the service life

Pending Publication Date: 2022-07-15
GUANGZHOU ZHUOYUE ELECTRIC ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lead-acid batteries have problems such as low utilization rate of active materials, reduced growth of lead sulfate crystals, reduced service life under deep discharge, easy softening and falling off of active materials on plates, sulfation of negative electrodes, etc.

Method used

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  • Preparation method of graphene quantum dot composite material for lead-acid battery
  • Preparation method of graphene quantum dot composite material for lead-acid battery

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preparation example Construction

[0022] In order to solve the above problems, the present invention also provides a preparation method of a graphene quantum dot composite material for lead-acid batteries, which is characterized in that, comprising the following steps:

[0023] a) Add the auxiliary agent to the graphene powder and stir for 5-10min, then add pure water with a weight of 2.5-3.5 times the graphene weight while stirring, carry out dispersion treatment, then heat up to 120-200 ° C and stir for 4-5h to obtain a pre- Mixed liquid A;

[0024] b) Add 2.5-3.5 times pure water to the carbon nanotubes, then add nonylphenol polyoxyethylene ether and 2-aminoethanol for dispersion treatment, then heat up to 80-85°C and stir for 1-2h to obtain a premixed solution B;

[0025] c) Add the premix solution B to the premix solution A and the expansion agent, sonicate in a water bath at 40-60°C for 1-3h, then put it into a high-speed mixer and stir at a speed of 6000-8000rpm for 5-8h to obtain a graphene quantum do...

Embodiment 1

[0042] Embodiment 1 provides a kind of preparation method of graphene quantum dot composite material for lead-acid battery, comprising the following steps:

[0043] a) Add the auxiliary agent into the graphene powder and stir for 8 minutes, then add pure water with 3 times the weight of graphene while stirring, carry out dispersion treatment, and then heat up to 150 ° C and stir for 4 hours to obtain premix A;

[0044] b) Add 3 times pure water to the carbon nanotubes, then add nonylphenol polyoxyethylene ether and 2-aminoethanol for dispersion treatment, then heat up to 80°C and stir for 2h to obtain premix B;

[0045] c) adding premix solution A and expansion agent to premix solution B, sonicating in a water bath at 50° C. for 2 hours, and then putting it into a high-speed mixer and stirring at a speed of 6000 rpm for 6 hours to obtain a slurry of graphene quantum dot composite material;

[0046] d) filtering, drying and pulverizing the slurry to obtain a graphene quantum dot ...

Embodiment 2

[0055] Embodiment 2 provides a kind of preparation method of graphene quantum dot composite material for lead-acid battery, comprising the following steps:

[0056] a) Add the auxiliary agent into the graphene powder and stir for 8 minutes, then add pure water with 3 times the weight of graphene while stirring, carry out dispersion treatment, and then heat up to 150 ° C and stir for 4 hours to obtain premix A;

[0057] b) Add 3 times pure water to the carbon nanotubes, then add nonylphenol polyoxyethylene ether and 2-aminoethanol for dispersion treatment, then heat up to 80°C and stir for 2h to obtain premix B;

[0058] c) adding premix solution A and expansion agent to premix solution B, sonicating in a water bath at 50° C. for 2 hours, and then putting it into a high-speed mixer and stirring at a speed of 6000 rpm for 6 hours to obtain a slurry of graphene quantum dot composite material;

[0059] d) filtering, drying and pulverizing the slurry to obtain a graphene quantum do...

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Abstract

The invention discloses a preparation method of a graphene quantum dot composite material for a lead-acid battery, and the graphene quantum dot composite material is prepared from the following raw materials in parts by weight: 60-100 parts of graphene, 20-40 parts of carbon nanotubes, 1-5 parts of an expanding agent, 1-3 parts of nonylphenol polyoxyethylene ether, 1-5 parts of 2-aminoethanol and 3-15 parts of an auxiliary agent. The auxiliary agent is prepared from the following raw materials in parts by weight: 1 to 3 parts of polyester staple fiber, 1 to 3 parts of nano oxide, 1 to 3 parts of terpineol and 1 to 5 parts of silane coupling agent. The prepared graphene quantum dot composite material for the lead-acid battery can effectively prolong the service life of the lead-acid battery and improve the stability of the lead-acid battery.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and in particular relates to a preparation method of a graphene quantum dot composite material for lead-acid batteries. Background technique [0002] Lead-acid batteries have been in existence for more than 150 years and still play a pivotal role in chemical power sources, accounting for about half of market applications. At present, lead-acid batteries are mostly used as power batteries in electric vehicles because of their low cost, abundant raw material resources and easy availability. In addition, lead-acid batteries can be used in a wide range of temperatures, failed batteries can also be recycled, and the most important thing is high safety performance. [0003] With the continuous development of new energy storage and new energy power markets, especially in hybrid electric vehicles and intermittent new energy storage applications, secondary batteries are required to have good ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/12H01M10/42H01M4/62C01B32/182C01B32/158
CPCH01M4/5825H01M4/362H01M10/12H01M10/4235H01M4/628H01M4/625C01B32/182C01B32/158
Inventor 吴嘉豪李政文黎少伟肖笛青
Owner GUANGZHOU ZHUOYUE ELECTRIC ENERGY TECH CO LTD
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