A kind of preparation method of lithium battery hard carbon negative electrode material

A negative electrode material, lithium battery technology, applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc. High capacity, increased specific surface area, good rate performance

Active Publication Date: 2022-04-22
云南中晟新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a preparation method of a lithium battery hard carbon negative electrode material, which mainly solves the problems of low capacity and low charge-discharge rate of traditional batteries, and simultaneously solves the problems of waste of resources and environmental pollution caused by landfilling waste automobile brake pads

Method used

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  • A kind of preparation method of lithium battery hard carbon negative electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Weigh 50 parts by weight of waste car brake pads and fill them into a porcelain ark, place the ark in a quartz tube furnace, fill with excess nitrogen, heat up to 400°C, keep it for 2 hours, then raise it to 1200°C, and keep it for 2 hours After naturally cooling to room temperature, the sample obtained was ball milled for 30 minutes, passed through a 200-mesh sieve, pickled 3 times with 150 parts by weight of HCl with a mass concentration of 65%, filtered by ultrasonic dispersion for 30 minutes, and then washed with 150 parts by weight of HCl Alkaline washing with 30% LiOH solution for 3 times, ultrasonic dispersion for 30 minutes, suction filtration, and 150 parts by weight deionized water washing for 3 times until the filtrate was neutral, and the filtered sample was dried in an oven at 100°C for 24 hours , grind and pass through a 200-mesh sieve to obtain phenolic resin pyrolytic carbon, for subsequent use;

[0016] 2) Transfer the above-mentioned phenolic resin ...

Embodiment 2

[0020] It is exactly the same as Example 1, except that 60 parts by weight of waste automobile brake pads and 2 parts by weight of PbO / CNTs composite nanomaterials are added.

Embodiment 3

[0022] It is exactly the same as Example 1, except that 55 parts by weight of waste automobile brake pads and 5 parts by weight of PbO / CNTs composite nanomaterials are added.

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Abstract

The invention discloses a method for preparing a lithium battery hard carbon negative electrode material. The method uses waste automobile brake pads as the main raw material, introduces PbO / CNTs composite nanomaterials, and prepares the battery capacity by physical compounding, chemical synthesis and other methods. Lithium-ion battery with high charge and discharge rate performance. Compared with traditional battery negative electrode materials, the lithium battery hard carbon negative electrode material prepared in the present invention uses waste automobile brake pads as the main source of phenolic resin, which not only recycles the waste, but also makes the waste have a good treatment Disposal realizes the recycling and reuse of waste, and as the negative electrode material of lithium-ion batteries, the prepared lithium-ion batteries have high capacity and charge and discharge rates, so they have good promotion and application value.

Description

technical field [0001] The invention relates to a preparation method of a lithium battery negative electrode material, in particular to a preparation method of a hard carbon negative electrode material used in an automobile lithium battery. Background technique [0002] With the rapid development of the automobile industry, the number of scrapped automobile brake pads with phenolic resin as the main component is also increasing. The main component of automobile brake pads is phenolic resin. There are many difficulties, but because its structure contains a large number of benzene rings and has a large cross-linking density, it has high mechanical strength and good electrical properties, as well as heat resistance, wear resistance, corrosion resistance and other properties, thus It still occupies a major position in various electronic devices and is widely used in electronic products. For example: making insulation mechanism components for electrical appliances and instrument...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 阚森王宁
Owner 云南中晟新材料有限责任公司
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