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Preparation method of lithium cobaltate material

A technology of lithium cobalt oxide and lithium carbonate, applied in chemical instruments and methods, cobalt compounds, inorganic chemistry, etc., can solve the problems of increasing liquid and solid mixing procedures, increasing the length and difficulty of the process, hidden dangers of organic matter, etc., to avoid safety Hidden dangers and environmental problems, perfect crystal growth, and the effect of improving production efficiency

Active Publication Date: 2004-12-22
JIANGSU DANGSHENG MATERIAL TECH CO LTD +1
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AI Technical Summary

Problems solved by technology

Loose packaging is conducive to the uniformity of the atmosphere, but the contact between the reactants is not good, which is not conducive to the uniform reaction and crystal growth of the product
In the crushing process, coarse crushing and jet mill ultra-fine crushing are usually used, which has the problems of low crushing efficiency and high energy consumption of the process.
And most processes only have one sintering, insufficient material oxidation and imperfect crystal growth
[0004] The publication number published by the China Intellectual Property Office is CN1361061 A, the application number is 00136974.1, and the patent titled the preparation method of lithium cobalt oxide material uses the method of briquetting and granulating the dry powder mixture to solve the problem of poor contact between the reaction materials However, in this method, the powder material needs to be uniformly mixed with the liquid (or contains a binder) before granulation, and most of them use organic solvents or organic binders so that the briquetting and granulation can be dried quickly. On the one hand, the liquid and solid mixing procedure is increased, and at the same time, the use of organic substances brings safety hazards, and there are also recycling or environmental protection problems, thus increasing the length and difficulty of the process and increasing the cost

Method used

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  • Preparation method of lithium cobaltate material

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preparation example Construction

[0024] refer to figure 1 A kind of preparation method of lithium cobalt oxide material of the present invention, its step comprises:

[0025] 1) 317.35 grams of lithium carbonate, 681.30 grams of cobalt tetroxide, and 1.9 grams of zirconium dioxide are uniformly mixed;

[0026] 2) Compact the above-mentioned mixture with a bowl press, and the compacted density is 0.8-2.0g / cm 3 , and then put the compacted mixture into the sagger;

[0027] 3) After energizing the kiln and adjusting the temperature in the high-temperature zone of the kiln to 900°C, stack the above-mentioned saggers after filling the bowls and place them on the push plate of the outer push plate frame, and perform a sintering for 16 to 22 hours;

[0028] 4) Using a jaw crusher and a combined crushing system to crush the compacted mixture after primary sintering, and the particle size of the output material is D50=3-15um;

[0029] 5) After the above-mentioned pulverized mixture is compacted with a bowl press, i...

Embodiment 1

[0035] Mix 317.35 grams of lithium carbonate, 681.30 grams of tricobalt tetroxide, and 1.9 grams of zirconium dioxide evenly, compact the above-mentioned mixture with a bowl press, and then put the compacted mixture into the sagger; Constant temperature sintering for 16 hours. After being processed by the crushing system, it was sintered again at 900°C for 16 hours. After crushing, the particle size of the product was 7.09um, and the tap density was 2.36g / cm 3 .

Embodiment 2

[0037] Mix 373.15 grams of lithium carbonate with 808.28 grams of cobalt tetroxide evenly, compact the above mixture with a bowl press, and then put the compacted mixture into a sagger; sinter at a constant temperature of 900 degrees in the kiln for 22 hours. After being processed by the combined crushing system, it is sintered again at 900°C for 18 hours. After crushing, the particle size of the product is 7.78um and the tap density is 2.51g / cm 3 .

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Abstract

A process for preparing lithium cobaltate includes proportionally mixing lithium carbonate, Co3O4 and ZrO2, compacting the mixture, sintering at 900 deg.C for 16-22 hr, pulverizing, compacting, sintering again for 16-22 hr, pulverizing and sieving.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery. Background technique [0002] Lithium-ion batteries have the characteristics of high capacity, high specific energy, long life, and environmental protection. The industrialized production of lithium-ion batteries and the rapid development of more than 10 years have not only promoted the development of portable electrical appliances, but also led to the rapid development and fierce competition of the battery material industry worldwide. In the 4V-level electrode materials that are paired with carbon materials to form lithium-ion batteries (LiCoO 2 , LiNiO 2 and LiMn 2 o 4 ), LiCoO 2 The material has the characteristics of easy preparation, high capacity, good recyclability, small memory effect, long service life and high safety. The product is in an application position that is difficult to replace. [0003] In the production of lithium cobalt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00H01M4/52H01M4/58
CPCY02E60/12Y02E60/10
Inventor 白厚善陈彦彬
Owner JIANGSU DANGSHENG MATERIAL TECH CO LTD
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