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Coating composition, lithium battery ternary positive electrode material sieving screen mesh and preparation method of lithium battery ternary positive electrode material sieving screen mesh

A technology of coating composition and positive electrode material, which can be applied to coatings, chemical instruments and methods, sieves, etc., can solve problems such as inability to effectively resist alkaline corrosion, improve retention rate and service life of sieves, and reduce magnetic properties. Foreign matter content, effect of reducing the risk of breakage

Pending Publication Date: 2022-01-28
乳源东阳光新能源材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The primary purpose of the present invention is to overcome the problem that the existing coatings cannot effectively resist the alkaline corrosion of lithium battery ternary positive electrode materials, and to provide a coating composition. The coating prepared by the coating composition can effectively isolate lithium battery ternary Erosion of the positive electrode material to the screen mesh, thereby reducing the risk of screen mesh breakage, improving the retention rate of the screen aperture and the service life of the screen

Method used

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  • Coating composition, lithium battery ternary positive electrode material sieving screen mesh and preparation method of lithium battery ternary positive electrode material sieving screen mesh
  • Coating composition, lithium battery ternary positive electrode material sieving screen mesh and preparation method of lithium battery ternary positive electrode material sieving screen mesh
  • Coating composition, lithium battery ternary positive electrode material sieving screen mesh and preparation method of lithium battery ternary positive electrode material sieving screen mesh

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A coating composition, by mass percentage, the coating comprises the following components: ZrO 2 40%; LiAlO 2 35%;TiO 2 10%; MgO 10%; SiO 2 5%.

[0037] The steps of preparing the sieve screen of the lithium battery ternary positive electrode material using the coating composition of the above components are as follows:

[0038] S1. Weigh each component according to the mass percentage, mix and grind to obtain the powder coating raw material whose particle size is nanoscale;

[0039] S2. Spray the prepared spraying material evenly on the front and back sides of the screen wire edge by the oxygen-ethylene flame spraying method, covering the original screen wire edge, the spraying temperature is 1350°C, and the spray coating thickness is 30nm;

[0040] S3. Put the sprayed screen into a box-type furnace for sintering with the sagger as the bottom bracket, the sintering temperature is 750°C, and the sintering time is 3 hours. After sintering out of the box, test the ...

Embodiment 2

[0042] Different from Example 1, by mass percentage, the coating described in this example includes the following components: ZrO 2 35%; LiAlO 2 40%;TiO 2 10%; MgO 10%; SiO 2 5%.

Embodiment 3

[0044] Different from Example 1, by mass percentage, the coating described in this example includes the following components: ZrO 2 35%; LiAlO 2 35%;TiO 2 10%; MgO 10%; SiO 2 10%.

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Abstract

The invention discloses a coating composition, a lithium battery ternary positive electrode material sieving screen mesh and a preparation method of the lithium battery ternary positive electrode material sieving screen mesh, and the coating composition comprises the following components in percentage by mass: 30-45% of ZrO2; 30% to 45% of LiAlO2; 25%-20% of TiO; 5%-20% of MgO; and 2%-15% of SiO2. The coating provided by the invention can reduce the friction between the lithium battery ternary positive electrode material and a stainless steel screen mesh wire in the screening process, so that the mixing of strong magnetic metals such as Ni and Cr in the original screen mesh material is effectively controlled, the content of magnetic foreign matters in the ternary positive electrode material is reduced, and the cycling stability and the safety performance of a product are improved. And meanwhile, the formed screen coating can effectively isolate alkaline erosion of the lithium battery ternary positive electrode material to the mesh wire, the fracture risk of the mesh wire is reduced, the aperture retention rate of the screen is increased, and the service life of the screen is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery positive electrode materials, and more specifically, to a coating composition, a sieve mesh for lithium battery ternary positive electrode materials and a preparation method thereof. Background technique [0002] The content of magnetic foreign matter in the lithium battery ternary cathode material has always been an important factor affecting the safety performance of the ternary lithium battery. Therefore, how to control the content of magnetic foreign matter in the lithium battery ternary cathode material is a key link in the preparation process of the lithium battery cathode material. One of the common methods in the industry to control the content of magnetic foreign matter in the preparation process of lithium battery ternary cathode materials is to use electromagnetic demagnetization to remove magnetic foreign matter after sieving. However, in actual production, this method still...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61B07B1/46
CPCC09D1/00C09D7/61B07B1/4618
Inventor 丘吉祥张军李鹏飞李洪伟
Owner 乳源东阳光新能源材料有限公司
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