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High-density spherical lithium nickel cobalt manganese oxygen and method for preparing the same

A lithium-nickel-cobalt-manganese-oxygen, high-density technology is applied in the field of lithium-nickel-cobalt-manganese-oxygen to achieve the effects of easy industrialization, easy cleaning, and increased volume specific capacity

Inactive Publication Date: 2008-09-24
GUANGZHOU RONGJIE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The co-precipitation method realizes the uniform mixing of the three elements at the atomic level and provides favorable conditions for industrialization. Moreover, the morphology of the precursor is not changed during the sintering process after adding the lithium source, and the shape of the precursor is basically not changed. particle size, so the co-precipitation method is an ideal preparation method, but the precursor particles synthesized at present are all irregular shapes, even if they are spherical, they are only secondary agglomerated particles

Method used

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  • High-density spherical lithium nickel cobalt manganese oxygen and method for preparing the same

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Experimental program
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Effect test

Embodiment 1

[0025] Use deionized water to make cobalt sulfate into 1M, nickel sulfate 0.6M, manganese sulfate 1M, ammonium citrate into 2M mixed solution, use deionized water to make potassium hydroxide into 4M, ammonia water into 2M mixed solution, Turn on the stirring of the reaction vessel, put in 3 liters of deionized water, heat the bottom water to 40°C, add the nickel-cobalt-manganese solution into the reaction vessel at a flow rate of 5ml / min, and add the alkaline precipitant potassium hydroxide to 5-15ml The flow rate of / min is added to the reaction container, and the pH value is controlled by adjusting the flow rate of potassium hydroxide to 11.5±0.3. The precipitate suspension generated by the reaction overflows to another container for aging. After aging for 6 hours, the precipitate Wash until the pH of the washing water is less than 7.5, then filter, dry the filter cake at 90°C, weigh 90g of the dried product and 38.8g of lithium hydroxide, measure 50ml of deionized water, mix...

Embodiment 2

[0027] Use deionized water to make a mixed solution of cobalt chloride to 2M, nickel chloride to 0.5M, manganese chloride to 0.5M, and ammonium citrate to 1M, and deionized water to make potassium hydroxide to 4M and ammonia To form a 2M mixed solution, turn on the stirring of the reaction vessel, put in 3 liters of deionized water, and heat the bottom water to 50°C, the nickel-cobalt-manganese solution is added to the reaction vessel at a flow rate of 4ml / min, and the alkaline precipitant hydrogen Potassium oxide is added to the reaction vessel at a flow rate of 5-15ml / min. By adjusting the flow rate of potassium hydroxide, the pH value is controlled to 10.5±0.3, and the precipitate suspension generated by the reaction overflows into another container for aging. After 6 hours, the precipitate was washed until the pH of the washing water was less than 7.5, then filtered, the filter cake was dried at 120°C, 90g of the dried product and 39.8g of lithium carbonate were weighed, an...

Embodiment 3

[0029] Use deionized water to make a mixed solution of cobalt chloride to 1M, nickel chloride to 0.8M, manganese chloride to 0.8M, and ammonium oxalate to 0.5M, and deionized water to make sodium hydroxide to 7M and ammonia To form a 1M mixed solution, turn on the stirring of the reaction vessel, put in 3 liters of deionized water, and heat the bottom water to 40°C, the nickel-cobalt-manganese solution is added to the reaction vessel at a flow rate of 10ml / min, and the alkaline precipitant hydrogen Sodium oxide is added to the reaction vessel at a flow rate of 5-15ml / min. By adjusting the flow rate of sodium hydroxide, the pH value is controlled to be 10±0.3, and the precipitate suspension generated by the reaction overflows into another container for aging. After 6 hours, wash the precipitate until the pH of the washing water is less than 7.5, then filter, dry the filter cake at 95°C, weigh 105g of the dried product and 40g of lithium carbonate, measure 55ml of deionized water...

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Abstract

The invention relates to a high density spherical shape LiNixCoyMn(1-x-y)O2 and a preparation method thereof, and belongs to the products of chemical industry, in particular to the preparation of the high density spherical shape LiNixCoyMn(1-x-y)O2 which is mainly used for manufacturing a lithium ion battery. Firstly, a high density spherical shape nickel cobalt and manganese predecessor body is synthesized by controlling the synthetic technology, secondly, the high density spherical shape nickel cobalt and manganese predecessor body is mixed with a lithium source and then is calcined under the specified conditions, so the high density spherical shape LiNixCoyMn(1-x-y)O2 can be obtained. The LiNixCoyMn(1-x-y)O2 is a spherical shape crystal, the mean grain size is 3-20 micrometers, the loose packed density is more than or equal to 1.0g / cm<3>, and the tap density is more than or equal to 2.0g / cm<3>. The synthesized LiNixCoyMn(1-x-y)O2 is of a single spherical shape, has better tap density, and can improve the volume ration capacity of the battery. The LiNixCoyMn(1-x-y)O2 is formed by calcining the predecessor body which has a spherical shape particle, high density, and complete crystalline form structure, compared with the synthetic technology of the predecessor body, the preparation method is simple, the cost is low, and the particle size can be controlled, and the industrialization is easy.

Description

technical field [0001] The present invention relates to a kind of lithium nickel cobalt manganese oxide, chemical formula LiNi x co y mn 1-x-y o 2 , is a chemical product, especially the preparation of high-density spherical lithium-nickel-cobalt-manganese-oxygen, which is mainly used to make lithium-ion batteries. Background technique [0002] Lithium-ion battery is a new type of power source, it has many advantages such as high voltage, large capacity, safety and environmental protection, so it is widely used in the field of secondary batteries. At present, lithium cobaltate is the most widely used cathode material for lithium-ion batteries. However, because cobalt is a strategic metal and the price of cobalt has been rising all the way in recent years, the cost of using lithium cobaltate as a battery has increased. Major manufacturers are looking for alternatives. Lithium cobalt oxide cathode material. [0003] Lithium-ion battery cathode material is a compound with ...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G51/04C01G45/02C01D15/02H01M4/48H01M4/505H01M4/525
CPCY02E60/10
Inventor 吕向阳左一村
Owner GUANGZHOU RONGJIE MATERIAL TECH
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