Double-layer structure sagger for lithium battery positive electrode material and preparation method of double-layer structure sagger

A technology of positive electrode material and double-layer structure, which is applied in the field of lithium battery positive electrode material sagger and its preparation, which can solve the problems of poor thermal shock stability, affecting industrial production, and peeling on the surface of the sagger

Active Publication Date: 2021-09-10
阳泉银宇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

However, because the raw materials used in the synthesis of lithium-ion cathode materials will have a great erosive effect on the sagger during the high-temperature synthesis process, and the sagger material is in the cycle of rapid cooling after repeated high temperatures, the sagger is prone to cracks, and the thermal shock is stable. performance is damaged, the service life will be greatly reduced
[0005] (2) Poor erosion resistance
[0006] (3) Poor thermal shock stability
During the use of the sagger material, because the sagger material is a heterogeneous brittle material, the thermal expansion is relatively large, the thermal conductivity and elastic modulus are relatively

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0043] A preparation method of a double-layer structure saggar for positive electrode materials of lithium batteries, comprising:

[0044] Premixed aggregate: crushed 30-40 parts of cordierite, 15-20 parts of magnesium aluminum spinel, 2-5 parts of wood calcium, 3-5 parts of pulp waste liquid and 2-5 parts of yellow dextrin, Mix evenly until the surface of the dry granules is wetted to obtain a mixed aggregate;

[0045] Further, the particle size of the cordierite is 0.3-2.5 mm, and the particle size of the magnesium aluminum spinel is 0.3-1.5 mm.

[0046] Processing and molding: under ultrasonic conditions, add 5-15 parts of mullite fine powder, 5-12 parts of aluminum powder, 5-12 parts of clay and 4-6 parts of lithium petalite powder into the mixed aggregate After 30-50 minutes of mixing and 20-24 hours of aging, the green body of the sagger is made by grouting or extrusion;

[0047] Further, the mullite fine powder specification is M70 mullite, 200 mesh;

[0048] Further...

Embodiment 1

[0059] A double-layer structure sagger for lithium battery positive electrode materials proposed in this embodiment, which includes a base layer and a surface coating;

[0060] The raw materials of the matrix layer include the following components: 30kg of cordierite, 15kg of mullite fine powder, 15kg of magnesium aluminum spinel, 12kg of aluminum powder, 5kg of clay, 6kg of petalite powder, 2kg of wood Calcium, 5kg of pulp waste liquor and 2kg of yellow dextrin;

[0061] Among them, the particle size of cordierite is 0.3-2.5mm, the crystal phase is 95, and the linear expansion coefficient is 2.0×10 -6 Second power; mullite fine powder specification M70 mullite, 200 mesh; magnesium aluminum spinel particle size is 0.3-1.5mm; aluminum powder particle size specification is 325 mesh, aluminum content ≥ 97%, sodium content less than 1%; The clay is one of Guangxi white clay or Suzhou white clay, and the iron content is less than 0.3%; the lithium content in lithium permeable feld...

Embodiment 2

[0072] A double-layer structure sagger for lithium battery positive electrode materials proposed in this embodiment, which includes a base layer and a surface coating;

[0073] The raw materials of the matrix layer include the following components: 40kg of cordierite, 5kg of mullite fine powder, 20kg of magnesium aluminum spinel, 5kg of aluminum powder, 12kg of clay, 4kg of petalite powder, 5kg of wood Calcium, 2kg of pulp waste liquor and 5kg of yellow dextrin;

[0074] Among them, the particle size of cordierite is 0.3-2.5mm, the crystal phase is 95, and the linear expansion coefficient is 2.0×10 -6 Second power; mullite fine powder specification M70 mullite, 200 mesh; magnesium aluminum spinel particle size is 0.3-1.5mm; aluminum powder particle size specification is 325 mesh, aluminum content ≥ 97%, sodium content less than 1%; The clay is one of Guangxi white clay or Suzhou white clay, and the iron content is less than 0.3%; the lithium content in lithium permeable feldspa...

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Abstract

The invention relates to the technical field of sagger kiln furniture preparation, and provides a double-layer structure sagger for a lithium battery positive electrode material and a preparation method of the double-layer structure sagger. The double-layer structure sagger for the lithium battery positive electrode material comprises a base body layer and a surface coating. The preparation method of the double-layer structure sagger for the lithium battery positive electrode material comprises the steps of premixing aggregate, processing and forming, mixing and pulping a surface coating, drying, sintering at high temperature and the like. The sagger with the double-layer structure for the positive electrode material of the lithium battery, which is prepared by adopting the method, has good corrosion resistance of resisting erosion of Li<+>, Co<2+> and the like, is high in cycle use frequency, long in service life, relatively small in thermal expansion coefficient, excellent in thermal shock resistance and certain in bearing strength, the positive electrode material is easy to peel off when being in contact with the sagger, the sagger is not peeled off in the use process, no slag falling and no pollution is generated, the product is an ideal improved product of the current cordierite-mullite sagger, is suitable for the sintering process of various lithium battery cathode materials, and is beneficial to reducing the production cost and improving the economic benefit.

Description

technical field [0001] The invention relates to the technical field of sagger kiln furniture preparation, in particular to a sagger for positive electrode materials of lithium batteries and a preparation method thereof. Background technique [0002] The sagger is made of refractory mud and other materials after high-temperature roasting. It is one of the important kiln furniture for firing lithium battery cathode materials. All kinds of lithium battery positive electrode materials must be loaded into the sagger before being loaded into the high-temperature kiln for roasting. At present, compared with foreign products of the same type, domestic saggers still have a large gap in terms of cycle life, corrosion resistance, thermal shock stability, and material bearing strength. If the above-mentioned saggers are directly used for production, the The cost of replacing the saggar is enormous, and it also causes great harm to the environment. [0003] According to the actual indu...

Claims

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Application Information

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IPC IPC(8): C04B35/195C04B35/622C04B41/81F27D5/00
CPCC04B35/195C04B35/62204C04B41/81C04B41/5066F27D5/0012C04B2235/3222C04B2235/349C04B2235/3463C04B2235/3472C04B2235/402C04B2235/6567C04B41/5059C04B41/5031C04B41/50C04B41/4803C04B41/4539C04B41/0072C04B41/4869Y02E60/10
Inventor 王泽宇薪
Owner 阳泉银宇新材料有限责任公司
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