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Sagger with high-yield for lithium battery cathode material and manufacturing method thereof

A positive electrode material and high-yield technology, applied in the field of saggers, can solve the problems of poor corrosion resistance, shortened service life of saggars, and damage to the microstructure of saggars, and achieve simple manufacturing methods, reduced material costs and production costs, and high The effect of service life

Inactive Publication Date: 2019-11-15
湖南太子新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lithium battery positive electrode material sagger still has the problem of poor corrosion resistance. The lithium battery positive electrode materials used for roasting are mostly powdery, with strong penetration ability. The material is highly corrosive. During the roasting process of the positive electrode material of the lithium battery, due to the contact process between the lithium ion and the sagger, the lithium ion can precipitate Si, Al, Mg plasma in the sagger, thereby destroying the microstructure of the sagger , the sagger was corroded, resulting in a significantly shortened service life of the sagger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention discloses a high-yield lithium battery anode material sagger, which comprises a pot body formed integrally from the bottom of the pot and the side of the pot, and a protective coating coated on the inner surface of the pot;

[0031] The bowl includes the following raw materials in mass percentage: 50% mullite, 30% α-alumina, 15% potassium acetylacetonate, and 5% paraffin;

[0032] The protective coating comprises the following raw materials in mass percentage: 40% of silicon carbide coarse powder, 30% of silicon carbide fine powder, 20% of polyacrylate, 9.9% of methanol, 0.1% of attapulgite; the coating thickness of the protective coating is 0.5mm.

[0033] The particle diameter of mullite is 10 μm, the particle diameter of α-alumina is 10 nm, the particle diameter of silicon carbide coarse powder is 10 mm, and the particle diameter of silicon carbide fine powder is 10 μm.

[0034] The manufacturing method of the above-mentioned high-yield lithium battery...

Embodiment 2

[0042] The invention discloses a high-yield lithium battery anode material sagger, which comprises a pot body formed integrally from the bottom of the pot and the side of the pot, and a protective coating coated on the inner surface of the pot;

[0043] The bowl includes the following raw materials in mass percentage: 70% mullite, 20% α-alumina, 5% potassium isopropoxide, and 5% carboxymethyl cellulose;

[0044] The protective coating comprises the following raw materials in mass percentage: 39.5% of silicon carbide coarse powder, 40% of silicon carbide fine powder, 10% of polyacrylate, 10% of methanol, 0.5% of attapulgite; the coating thickness of the protective coating is 1.5mm.

[0045] The particle diameter of mullite is 1 μm, the particle diameter of α-alumina is 1 nm, the particle diameter of silicon carbide coarse powder is 1 mm, and the particle diameter of silicon carbide fine powder is 1 μm.

[0046] The manufacturing method of the above-mentioned high-yield lithium...

Embodiment 3

[0054] The invention discloses a high-yield lithium battery anode material sagger, which comprises a pot body formed integrally from the bottom of the pot and the side of the pot, and a protective coating coated on the inner surface of the pot;

[0055] The bowl includes the following raw materials in mass percentage: 60% mullite, 20% α-alumina, 15% potassium acetylacetonate, and 5% carboxymethyl cellulose;

[0056] The protective coating comprises the following raw materials in mass percentage: 35% of silicon carbide coarse powder, 35% of silicon carbide fine powder, 20% of polyacrylate, 9.7% of methanol, 0.3% of attapulgite; the coating thickness of the protective coating is 1mm.

[0057] The particle diameter of mullite is 5 μm, the particle diameter of α-alumina is 5 nm, the particle diameter of silicon carbide coarse powder is 5 mm, and the particle diameter of silicon carbide fine powder is 5 μm.

[0058] The method for manufacturing a high-yield lithium battery cathode...

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Abstract

The invention discloses a sagger with high-yield for a lithium battery cathode material. The sagger comprises a sagger body and a protective coating, wherein the sagger body comprises: 50-70% of mullite, 10-30% of alpha-alumina, 5-15% of an organic metal salt, and 1-5% of a binder; and the protective coating comprises: 30-40% of silicon carbide coarse powder, 30-40% of silicon carbide fine powder,10-20% of polyacrylate, 1-10% of methanol, and 0.1-0.5% of attapulgite. A manufacturing method of the sagger comprises the following steps: weighing the raw materials constituting the sagger body, and adding water to form a slurry; placing the slurry in a mold, and performing press-forming to obtain a blank material; performing demoulding on the blank material after curing to obtain a blank body,and oven-drying the blank body after demoulding and then performing firing to obtain the sagger body; weighing the raw materials of the protective coating, and adding water to form a coating; covering the coating on the inner surface of the sagger body, and performing natural drying; and performing firing. The disclosed sagger for the lithium battery cathode material has high yield, high servicelife and corrosion resistance.

Description

technical field [0001] The invention relates to the field of sagger technology, more specifically, the invention relates to a high-yield lithium battery cathode material sagger and a manufacturing method thereof. Background technique [0002] At present, lithium cobaltate and ternary lithium batteries are currently widely used cathode materials for lithium batteries in China, and most of the cathode materials are produced by high-temperature solid-phase synthesis in refractory kilns. During the synthesis process, the sagger materials used for firing are generally cordierite, mullite, quartz and corundum. This type of sagger is made of cordierite, mullite, and corundum as raw materials, with some clay and micropowder added as a binder, and pressed into shape under a high-tonnage press. After constant temperature curing, it is fired in a refractory kiln. The product is obtained. and. The average index of sagger consumption at home and abroad is 200-300 kg per ton of positiv...

Claims

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Application Information

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IPC IPC(8): C04B35/185C04B35/66C04B41/87F27D5/00
CPCC04B35/185C04B35/66C04B41/009C04B41/5059C04B41/87C04B2235/3217C04B2235/48F27D5/0012C04B41/4539
Inventor 刘骏刘振华张海
Owner 湖南太子新材料科技有限公司