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Method for preparing negative electrode material, method for preparing battery and battery

A negative electrode material and battery technology, applied in the direction of cylindrical shell batteries/batteries, battery electrodes, negative electrodes, etc., can solve problems such as poor affinity, low battery capacity and first-time efficiency, and poor cycle life, so as to reduce negative reactions , Improve dynamic performance and reduce loss

Active Publication Date: 2022-04-15
山东宏匀科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a method for preparing negative electrode materials, a method for preparing batteries, and a battery. The method for preparing negative electrode materials of the present application can effectively solve the problem of micropores and mesopores in negative electrode materials in the prior art. Poor affinity between pores and lithium ions, and the surface has more chemical groups that react with the electrolyte, resulting in technical problems such as low capacity and initial efficiency of the prepared battery, and poor cycle life

Method used

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  • Method for preparing negative electrode material, method for preparing battery and battery
  • Method for preparing negative electrode material, method for preparing battery and battery
  • Method for preparing negative electrode material, method for preparing battery and battery

Examples

Experimental program
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Effect test

specific Embodiment 1

[0135] 1) Preparation of negative electrode material to be coated

[0136] Heat the phenolic resin (amorphous carbon material precursor) under the protection of argon (heating rate 5°C / min), and then treat it at high temperature (1100°C) for 2 hours to obtain carbide; then use a jet mill to The carbides after high temperature treatment are crushed and classified, and the classified products are tested with a laser particle size analyzer. If the particle size of the classified products meets D50 between 10±0.5μm, D10 between 6±0.5μm and D90 between 17 ±0.5 μm, the product is the anode material to be coated with the target particle size, otherwise continue the classification process until the above requirements are met.

[0137] 2) Configuration of coating solution containing zinc ions

[0138] Dissolve zinc acetate with a purity of 99.99% in isopropanol at room temperature, and then add monoethanolamine (the molar ratio of added monoethanolamine to zinc acetate is 1:1) as a st...

specific Embodiment 2

[0150] 1) Preparation of negative electrode material to be coated

[0151] Petroleum pitch (the precursor of amorphous carbon material) was heated under the protection of argon (heating rate 5°C / min), and then treated at high temperature (1100°C) for 2 hours to obtain carbides; The carbides after high temperature treatment are crushed and classified, and the classified products are tested with a laser particle size analyzer. If the particle size of the classified products meets D50 between 10±0.5μm, D10 between 6±0.5μm and D90 between 17 ±0.5 μm, the product is the anode material to be coated with the target particle size, otherwise continue the classification process until the above requirements are met.

[0152] 2) Configuration of coating solution containing zinc ions

[0153] Dissolve zinc acetate with a purity of 99.99% in isopropanol at room temperature, and then add monoethanolamine (the molar ratio of added monoethanolamine to zinc acetate is 1:1) as a stabilizer to o...

specific Embodiment 3

[0157] 1) Preparation of negative electrode material to be coated

[0158] Heat the phenolic resin (amorphous carbon material precursor) under the protection of argon (heating rate 5°C / min), and then treat it at high temperature (1100°C) for 2 hours to obtain carbide; then use a jet mill to Carbide after high temperature treatment is pulverized and classified, and the classified product is tested with a laser particle size analyzer. If the particle size of the classified product meets D50 between 10±0.5μm, D10 between 6±0.5μm and D90 between 17 ±0.5 μm, the product is the anode material to be coated with the target particle size, otherwise continue the classification process until the above requirements are met.

[0159] 2) Configuration of coating solution containing zinc ions

[0160] Dissolve zinc acetate with a purity of 99.99% in ethanol at room temperature, then add monoethanolamine (the molar ratio of added monoethanolamine to zinc acetate is 1:1) as a stabilizer to ob...

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Abstract

The present application provides a method for preparing the negative electrode material. The negative electrode material to be coated is mixed and stirred with the coating solution containing zinc ions, and then treated at 500°C to 700°C for 0.2 to 2 hours to obtain the coated negative electrode material. In the method for preparing the negative electrode material of the present application, the negative electrode material to be coated is treated with a coating solution containing zinc ions, so that the surface of the processed negative electrode material is coated with nano-zinc oxide, and the nano-zinc oxide on the surface of the negative electrode material is both It can be used as a lithium-loving crystal nucleus to reduce the energy barrier of lithium intercalation and deintercalation, improve the kinetic performance of lithium intercalation, and prevent some active groups and defects on the surface of the negative electrode material from directly contacting the electrolyte, thereby reducing the negative reaction during the lithium intercalation process , reducing the loss of reversible capacity; compared with the prior art, the capacity and initial efficiency of the battery obtained based on the coated negative electrode material obtained by the method for preparing the negative electrode material of the present application are higher, and the cycle performance is better.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to a method for preparing negative electrode materials, a method for preparing batteries and a battery. Background technique [0002] In the prior art, resin materials (1) such as polyphenolic aldehyde, polyacrylonitrile, polyimide resin, polyamide imide or aramid resin, or plant materials such as coconut shell, rice husk or walnut shell (2), or petroleum pitch or coal tar by-products (3) undergo high-temperature carbonization treatment to obtain amorphous carbon materials as negative electrode materials for lithium batteries or supercapacitors; however, lithium based on the negative electrode materials obtained by this method The capacity and initial efficiency of the battery are low, and the cycle life is poor. [0003] Aiming at the various deficiencies of the prior art, the inventors of the present application proposed a new method for preparing negative electrode m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/587H01M4/133H01M4/1393H01M10/04H01M10/0525H01M10/058
CPCH01M4/628H01M4/587H01M4/133H01M4/1393H01M10/0525H01M10/058H01M10/0427H01M2004/027H01M2004/021Y02E60/10Y02P70/50
Inventor 王宝君钟开富
Owner 山东宏匀科技有限公司