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Method for preparing nickel-cobalt-manganese ternary precursor with narrow particle size distribution

A narrow particle size distribution, nickel-cobalt-manganese technology, applied in the direction of chemical instruments and methods, electrical components, nickel compounds, etc., can solve the problems of wide particle size distribution of large particle products, failure to meet customer needs, low pH and low speed, etc., to achieve consistency Good performance, simple operation, and the effect of reducing the width of particle size distribution

Pending Publication Date: 2021-04-06
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, this product tends to have a wide distribution: (D90-D10) / (D90+D10)*100=(16-20), which does not meet customer needs
In actual production, the existing preparation method has problems such as low pH and low rotation speed in the early stage of the reaction, and agglomerated crystal nuclei are easily formed in the early stage of the reaction, resulting in an excessively wide particle size distribution of this large particle product

Method used

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  • Method for preparing nickel-cobalt-manganese ternary precursor with narrow particle size distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] will Ni 2+ 、Co 2+ , Mn 2+ Prepare a nickel-cobalt-manganese sulfate solution with a total metal concentration of 120g / L at a molar ratio of 34.8:34.0:34.2; 3 Prepare pH = 12, ammonia concentration = 9.5g / L, temperature is 65°C, and volume is 7.5m 3 The bottom liquid of the reaction kettle is fed with a nitrogen flow rate of 0.5m 3 / h, under the conditions of reaction temperature 65°C and reaction kettle stirring speed 350r / min, the above-mentioned salt solution, 20% ammonia solution and 35% liquid caustic soda are simultaneously added into the kettle through the corresponding liquid inlet pipe for reaction synthesis , in the first 8 hours of the reaction, while the dosage of nickel-cobalt-manganese sulfate solution was fixed at 200L / h, the dosage of liquid caustic soda and ammonia water was adjusted to lower and stabilize the pH at 10.5, and maintain the ammonia concentration at 9.0g / L. During the period from 8 hours to the end of the reaction, while fixing the dosa...

Embodiment 2

[0019] will Ni 2+ 、Co 2+ , Mn 2+ Prepare a nickel-cobalt-manganese sulfate solution with a total metal concentration of 100g / L at a molar ratio of 32.8:32.0:32.2; 3 Prepare pH = 11, ammonia concentration = 10.9g / L, temperature 55°C, volume 7.0m 3 The bottom liquid of the reaction kettle is fed with a nitrogen flow rate of 3m 3 / h, under the conditions of a reaction temperature of 55°C and a stirring speed of the reactor of 250r / min, the above-mentioned nickel-cobalt-manganese sulfate solution, 10% ammonia solution and 25% liquid caustic soda are simultaneously added to the kettle through the corresponding liquid inlet pipe Carry out reaction synthesis, within 8 hours in the early stage of the reaction, while fixing the dosage of nickel-cobalt-manganese sulfate solution at 250L / h, adjust the amount of liquid caustic soda and ammonia water so that the pH drops and stabilizes at 10.8, and the ammonia concentration maintains 10.5g / L. 8h to the end of the reaction, while fixing...

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Abstract

The invention discloses a method for preparing a nickel-cobalt-manganese ternary precursor with narrow particle size distribution, wherein the particle size distribution width of a product is reduced at the initial stage of reaction by optimizing a production process at the initial stage of reaction of a large-particle product corresponding to a mixed product, so that the particle size distribution of the product is narrowed, the consistency of particles is better, and a nickel-cobalt-manganese ternary precursor finished product which better meets the index requirements of customers is prepared. By adjusting the production process, the particle size distribution of the product can reach (D90-D10) / (D90+D10)*100 = (13-15), the particle size distribution width of the product is successfully reduced, and the problems that the particle size distribution result of an existing product is wide in particle size distribution and product particle consistency is poor are solved.

Description

technical field [0001] The invention relates to the field of preparation of new energy battery material precursors, in particular to a method for preparing a nickel-cobalt-manganese ternary precursor with a narrow particle size distribution. Background technique [0002] The low-nickel nickel-cobalt-manganese ternary precursor is an important raw material for the preparation of energy storage batteries. It has a wide range of applications and various specifications and models. The particle size distribution of the product is an important indicator affecting the performance of the sintered product. In actual production, this product tends to have a wide distribution: (D90-D10) / (D90+D10)*100=(16-20), which does not meet customer needs. In actual production, the existing preparation method has problems such as low pH and low rotation speed in the early stage of the reaction, and agglomerated crystal nuclei are easily formed in the early stage of the reaction, resulting in an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCC01G53/006H01M4/505H01M4/525C01P2004/61C01P2004/52Y02E60/10
Inventor 许开华刘坤吕志王登登邹书文袁先虎李蕾
Owner JINGMEN GEM NEW MATERIAL
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