Silicon carbide sagger for lithium battery positive electrode material and preparation method thereof

A positive electrode material and a technology of silicon carbide sagger, which is applied in the field of silicon carbide saggar and its preparation, can solve the problems of destroying the microstructure of the saggar, shortening the service life of the saggar, and having strong penetration ability, achieving good bonding and improving the service life. , The effect of strong anti-corrosion ability

Inactive Publication Date: 2020-05-19
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

Lithium battery positive electrode materials used for roasting are mostly powdery, with strong permeability. Lithium ions in the material are strongly alkaline substances, which are highly corrosive to sagger materials, and lithium ions can absorb the The Si, Al, Mg plasma precipitates out, thereby destroying the microstructure of the sagger, 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

[0025] A silicon carbide sagger for lithium battery positive electrode materials, comprising a sagger base and a working layer pressed on the inner surface of the sagger base; the sagger base is prepared from the following raw materials in parts by weight: 60 parts of silicon carbide powder, clay 25 parts, 10 parts of nano-zirconia, 5 parts of alumina powder, 5 parts of alkaline silica sol, 20 parts of water; the working layer is prepared from the following raw materials in parts by weight: 30 parts of silicon carbide powder, 20 parts of alumina powder, 10 parts of silicone resin, 1 part of talc powder, 1 part of graphene, and 2 parts of water; wherein the silicon carbide powder consists of the first group of silicon carbide powders with a particle size of 50-100 μm and the second group of silicon carbide powders with a particle size of 5-50 μm. A group of silicon carbide powders with a weight ratio of 1:2.

[0026] A method for preparing a silicon carbide sagger for lithium b...

Embodiment 2

[0032] A silicon carbide sagger for lithium battery positive electrode materials, comprising a sagger base and a working layer pressed on the inner surface of the sagger base; the sagger base is prepared from the following raw materials in parts by weight: 70 parts of silicon carbide powder, clay 20 parts, 10 parts of nano-zirconia, 5 parts of alumina powder, 5 parts of carboxymethyl cellulose, 15 parts of water; the working layer is prepared from the following raw materials in parts by weight: 40 parts of silicon carbide powder, 20 parts of alumina powder , 10 parts of silicone resin, 5 parts of talc powder, 3 parts of graphene, and 5 parts of water; wherein the silicon carbide powder consists of the first group of silicon carbide powders with a particle size of 50-100 μm and the second group of silicon carbide powders with a particle size of 5-50 μm Composed of two groups of silicon carbide powders, the weight ratio is 1:3.

[0033] A method for preparing a silicon carbide s...

Embodiment 3

[0039] A silicon carbide sagger for lithium battery positive electrode materials, comprising a sagger base and a working layer pressed on the inner surface of the sagger base; the sagger base is prepared from the following raw materials in parts by weight: 60 parts of silicon carbide powder, clay 15 parts, 5 parts of nano-zirconia, 5 parts of alumina powder, 5 parts of alkaline silica sol, 10 parts of water; the working layer is prepared from the following raw materials in parts by weight: 30 parts of silicon carbide powder, 20 parts of alumina powder, 10 parts of silicone resin, 1 part of talc powder, 1 part of graphene, and 2 parts of water; wherein the silicon carbide powder consists of the first group of silicon carbide powders with a particle size of 50-100 μm and the second group of silicon carbide powders with a particle size of 5-50 μm. A group of silicon carbide powders with a weight ratio of 1:2.

[0040] A method for preparing a silicon carbide sagger for lithium ba...

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Abstract

The invention belongs to the technical field of lithium battery positive electrode materials, and discloses a silicon carbide sagger for a lithium battery positive electrode material and a preparationmethod thereof. The preparation method comprises a sagger substrate and a working layer pressed on the inner surface of the sagger substrate. The sagger substrate is prepared from the following raw materials in parts by weight: 60-75 parts of silicon carbide powder, 15-25 parts of clay, 5-10 parts of nanometer zirconium oxide, 5-10 parts of aluminum oxide powder, 5-10 parts of a binding agent and10-20 parts of water. The working layer is prepared from the following raw materials in parts by weight: 30-40 parts of silicon carbide powder, 20-30 parts of aluminum oxide powder, 10-20 parts of organic silicon resin, 1-10 parts of talcum powder, 1-3 parts of graphene and 2-8 parts of water. The prepared silicon carbide sagger is high in corrosion resistance, the bonding performance of an anti-corrosion layer and a sagger body is good, service life is prolonged, and recycling of the sagger body can be achieved.

Description

technical field [0001] The invention belongs to the technical field of lithium battery cathode materials, and relates to a silicon carbide sagger used for lithium battery cathode materials and a preparation method thereof. Background technique [0002] Lithium-ion battery is a new generation of green battery, widely used in mobile communications, military, aerospace and information science fields. Lithium battery positive electrode material is an important part of the lithium ion battery. The raw materials are mixed by mechanical stirring, ball milling or pressing, and then calcined at high temperature by high temperature roasting, cooling and crushing. As a container for raw materials in the high-temperature roasting process, since the raw materials used in the positive electrode materials of lithium batteries will decompose during the synthesis process, lithium oxide with strong permeability and reactivity will corrode the sagger, and problems such as peeling and pulveriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/567
CPCC04B35/565C04B35/66C04B2235/3217C04B2235/3244C04B2235/3418C04B2235/3427C04B2235/349C04B2235/425C04B2235/483C06B23/007
Inventor 刘骏
Owner 湖南太子新材料科技有限公司
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