A composite fiber saggar used for synthesis of a lithium ion battery cathode material and a preparing method thereof

A technology of lithium ion battery and positive electrode material, which is applied in the field of composite fiber saggar for synthesizing positive electrode material of lithium ion battery and its preparation field, can solve the mismatch between thermal expansion coefficient and lattice constant, reduce the qualified rate of positive electrode material and affect the positive electrode. Electrochemical performance of materials and other issues, to achieve the effect of improving service life, inhibiting heavy metal pollution, and excellent stability

Active Publication Date: 2018-12-18
四川研瑞电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of this kind of double-layer structure saggar will be eroded by alkaline oxide first, so when the surface coating layer undergoes chemical changes, it will lead to composition segregation, resulting in a mismatch between the thermal expansion coefficient and the lattice constant, resulting in a gap between the surface and the substrate layer. shedding phenomenon
The shedding surface material will pollute the positive electrode material, thereby affecting the electrochemical performance of the positive electrode material, and ultimately reducing the pass rate of the positive electrode material product

Method used

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  • A composite fiber saggar used for synthesis of a lithium ion battery cathode material and a preparing method thereof
  • A composite fiber saggar used for synthesis of a lithium ion battery cathode material and a preparing method thereof
  • A composite fiber saggar used for synthesis of a lithium ion battery cathode material and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Prepare 15 parts of mullite, 5 parts of fiber mullite, 40 parts of cordierite, 15 parts of magnesium aluminum spinel, 5 parts of zircon, 2 parts of ceria, 10 parts of fiber alumina, fiber oxide 3 parts of magnesium, 5 parts of zirconia-yttrium oxide fibers are used as saggar raw materials, and then 5 parts of yellow dextrin of the total mass of sagger raw materials are added as a binding agent;

[0028] Step 2: The raw materials prepared in step 1 are mixed and pulped with deionized water as the medium. The amount of deionized water is 6 parts of the total mass of the sagger raw materials. After the mixed slurry is stirred evenly, it is stale for 24 hours. Then the slurry is pressed into a sagger green body through a molding device;

[0029] Step 3: Dry the green body of the sagger at room temperature for 24 hours, then dry it to keep the water content at about 1%, and then sinter it at 1320° C. for 2 hours to finally obtain the finished sagger.

Embodiment 2

[0031] Step 1: Prepare 20 parts of mullite, 5 parts of fiber mullite, 30 parts of cordierite, 20 parts of magnesium aluminum spinel, 5 parts of zircon, 3 parts of ceria, 7 parts of fiber alumina, fiber oxide 3 parts of magnesium, 7 parts of zirconia-yttrium oxide fibers are used as saggar raw materials, and then 5 parts of yellow dextrin of the total mass of sagger raw materials are added as a binding agent;

[0032] Step 2: The raw materials prepared in step 1 are mixed and pulped with deionized water as the medium. The amount of deionized water is 6 parts of the total mass of the sagger raw materials. After the mixed slurry is stirred evenly, it is stale for 24 hours. Then the slurry is pressed into a sagger green body through a molding device;

[0033] Step 3: Dry the green body of the sagger at room temperature for 24 hours, then dry it to keep the water content at about 1%, and then sinter it at 1330° C. for 4 hours to finally obtain the finished sagger.

Embodiment 3

[0035] Step 1: Prepare 5 parts of mullite, 8 parts of fiber mullite, 50 parts of cordierite, 10 parts of magnesium aluminum spinel, 8 parts of zircon, 3 parts of ceria, 5 parts of fiber alumina, fiber oxidation 1 part of magnesium, 10 parts of zirconia-yttrium oxide fibers are used as sagger raw materials, and then 5 parts of yellow dextrin of the total mass of sagger raw materials are added as a binding agent;

[0036] Step 2: The raw materials prepared in step 1 are mixed and pulped with deionized water as the medium. The amount of deionized water is 6 parts of the total mass of the sagger raw materials. After the mixed slurry is stirred evenly, it is stale for 24 hours. Then the slurry is pressed into a sagger green body through a molding device;

[0037] Step 3: Dry the green body of the sagger at room temperature for 24 hours, then dry it to keep the water content at about 1%, and then sinter it at 1340° C. for 3 hours to finally obtain the finished sagger.

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Abstract

A composite fiber saggar used for synthesis of a lithium ion battery cathode material and a preparing method thereof are disclosed. A matrix-enhanced composite fiber saggar material includes mullite,fibrous mullite, cordierite, magnesium aluminate spinel, fibrous alumina, fibrous magnesium oxide, zirconite, ceric oxide, and zirconia-yttrium oxide fibers. A synthetic process is simple, a sinteringprocess is easily controllable, and a prepared material is good in uniformity. The saggar has obviously improved resistance to high temperature and to corrosion than traditional saggars, obviously improved times of repetition and product quality, prolonged service lifetime and excellent thermal shock resistance. A surface layer of the saggar is effectively protected from stripping. The saggar facilitates production cost reduction of the lithium ion battery cathode material, thus increasing economic benefit.

Description

technical field [0001] The invention particularly relates to a composite fiber sagger for synthesizing positive electrode materials of lithium ion batteries and a preparation method thereof. Background technique [0002] At present, the actual production of synthetic lithium-ion battery cathode materials generally adopts high-temperature solid-phase synthesis, and the high-temperature-resistant saggers used in the synthesis process are generally high-temperature-resistant saggers such as cordierite, mullite, quartz, and corundum. , of which cordierite and corundum are most used. However, since the raw materials used in the synthesis of lithium-ion cathode materials will decompose during the synthesis process to produce lithium oxide (Li 2 O), the alkaline substance Li at high temperature 2 O chemically reacts with the acidic substances and amphoteric oxides in the sagger, so it will corrode the high temperature resistant saggar and greatly reduce the service life of the hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/195C04B35/185C04B35/622C04B38/00F27D5/00
CPCC04B35/803C04B35/185C04B35/195C04B35/622C04B38/00C04B2235/3206C04B2235/3222C04B2235/3229C04B2235/3248C04B2235/3463C04B2235/522C04B2235/5224C04B2235/5228C04B2235/656C04B2235/9669F27D5/0012
Inventor 李颖翔王飞王莺刘涛赵强
Owner 四川研瑞电子科技有限公司
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