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A preparation process of graphene-based composite negative electrode material for lithium battery

A graphene-based, preparation process technology, applied in battery electrodes, circuits, electrical components and other directions, can solve the problems of poor enterprise competitiveness, poor product quality, low yield and other problems, achieve low manufacturing costs, improve competitiveness, The effect of large profit margins

Active Publication Date: 2020-07-28
河北碳禾新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The most common method is to prepare graphite. However, the manufacturing process of battery anode materials is very mature and diversified at present, and the performance of the finished product is relatively high. However, the manufacturing processes of each manufacturer are kept secret or protected by patents. In the field of manufacturing negative electrode materials, it is necessary to design a new manufacturing process that is different from the existing technology
[0004] However, the self-designed manufacturing process is either complicated in process and low in yield, resulting in rising costs and making the company lose competitiveness; or poor product quality, making the company less competitive
[0005] Therefore, the applicant proposes a preparation process for graphene-based composite negative electrode materials for lithium batteries. The process is simple and the cost is low, but the performance of the finished product can meet the current needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation process for a lithium battery graphene-based composite negative electrode material, comprising the steps of:

[0022] S1. To prepare graphene oxide, assemble a 250 mL reaction bottle in an ice-water bath, add an appropriate amount of concentrated sulfuric acid, add a solid mixture of 2 g of graphite powder and 1 g of sodium nitrate under stirring, and then add 6 g of potassium permanganate in portions to control the reaction Stir the reaction for a period of time at a temperature not exceeding 20°C and then raise the temperature to about 35°C;

[0023] Continue stirring for 30 minutes, then slowly add a certain amount of deionized water, continue stirring for 20 minutes, and then add an appropriate amount of hydrogen peroxide to reduce the residual oxidant to turn the solution into bright yellow;

[0024] Filtrate while hot and wash with 5% HCl solution and deionized water until no sulfate group is detected in the filtrate, and finally place the filter cak...

Embodiment 2

[0033] A preparation process for a lithium battery graphene-based composite negative electrode material, comprising the steps of:

[0034] S1. To prepare graphene oxide, assemble a 250 mL reaction bottle in an ice-water bath, add an appropriate amount of concentrated sulfuric acid, add a solid mixture of 2 g of graphite powder and 1 g of sodium nitrate under stirring, and then add 6 g of potassium permanganate in portions to control the reaction Stir the reaction for a period of time at a temperature not exceeding 20°C and then raise the temperature to about 35°C;

[0035] Continue stirring for 30 minutes, then slowly add a certain amount of deionized water, continue stirring for 20 minutes, and then add an appropriate amount of hydrogen peroxide to reduce the residual oxidant to turn the solution into bright yellow;

[0036] Filtrate while hot and wash with 5% HCl solution and deionized water until no sulfate group is detected in the filtrate, and finally place the filter cak...

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Abstract

The invention discloses a preparation process of a graphene-based composite anode material for a lithium battery. The graphene-based composite anode material for the lithium battery is obtained by preparing graphene oxide, processing the graphene oxide with materials such as graphite powder, silver powder, carbon nanotubes, ascorbic acid, PVDF and 4-methylbenzeneboronic acid through different steps and processes, and finally the graphene-based composite anode material for the lithium battery is machined to obtain the anode for the battery. The preparation process is easy, and relatively low inmanufacturing cost, and the performance of a finished product is not lower than that of a mainstream finished product on the market, and even better than that of an imported finished product. Therefore, the preparation process can bring greater profit margins for enterprises and enhance the competitiveness of the enterprises.

Description

technical field [0001] The invention relates to a manufacturing process of a battery negative electrode material, in particular to a preparation process of a lithium battery graphene-based composite negative electrode material. Background technique [0002] The negative pole refers to the end of the power supply with a lower potential (potential). In a primary battery, it refers to the electrode that oxidizes, and it is written on the left in the battery reaction. From a physical point of view, it is a pole from which electrons flow out of the circuit. The negative electrode material refers to the raw material that constitutes the negative electrode in the battery. At present, the common negative electrode materials include carbon negative electrode materials, tin-based negative electrode materials, lithium-containing transition metal nitride negative electrode materials, alloy negative electrode materials and nanoscale negative electrode materials. [0003] The most commo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1393H01M4/36H01M4/583
CPCH01M4/1393H01M4/362H01M4/583Y02E60/10
Inventor 高小亮
Owner 河北碳禾新材料有限公司