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A method for preparing nickel-cobalt-manganese ternary material precursor

A technology of ternary materials and precursors, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of increased production costs, waste of resources, etc., and achieve improved tap density, low requirements for production equipment, and improved raw materials. The effect of utilization

Active Publication Date: 2016-06-29
北京盟固利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

However, compared with the ternary material precursors with a particle size larger than 6 μm, the intermolecular forces between the ternary material precursors with a particle size of less than 6 μm are more than the chemical bonds inside the precursor particles, so the tap density is much smaller than that of the particle size. Therefore, in industrial production, precursor particles with a particle size of 7-15 μm have greater practicability, while precursor particles with a particle size of less than 6 μm are discarded as waste, so It not only causes a great waste of resources, but also increases unnecessary production costs

Method used

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  • A method for preparing nickel-cobalt-manganese ternary material precursor

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preparation example Construction

[0054] According to the method for preparing nickel-cobalt-manganese ternary material precursor provided by the present invention, it has the following advantages:

[0055] (1) The method provided by the present invention can comprehensively utilize the small particle waste of the precursor of the ternary material produced in the production process, improve the raw material utilization rate of the ternary material in the production process, realize the full utilization of raw materials, and avoid the waste from being Waste of resources and cost increase due to waste;

[0056] (2) The content of the nickel-cobalt-manganese ternary material precursor with a particle size of 7 to 15 microns in the product is more than 95%, and the tap density of the precursor is more than 2.3g / cm3, which can improve the ternary cathode material. Tap density and cycle performance of follow-up lithium batteries;

[0057] (3) The method provided by the present invention is simple to operate, has lo...

Embodiment 1

[0060] Steps:

[0061] (1) A mixed solution of nickel sulfate, manganese sulfate and cobalt sulfate (the total concentration of the mixed solution is 2mol / L, of which Ni 2+ , Mn 2+ and Co 2+ The concentration ratio is 1:1:1), the NaOH solution with a concentration of 3mol / L and the ammonia solution with a concentration of 3mol / L are added to the reactor in parallel, the reaction temperature of the reactor is 60°C, and the stirring speed is 1300r / min. The pH of the system is 11, and Ni with a D50 particle size of 4 microns 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 Ternary material precursor particles (electron micrographs such as figure 2 shown) into the reaction kettle at a rate of 2ml / min, and the liquid overflows naturally;

[0062] (2) Input the material liquid overflowed and discharged in step (1) into the filter device for filtration and washing until no by-product salt sodium sulfate remains, then transfer to the drying device, dry at 110°C for 3 hours, and then pulverize to obta...

Embodiment 2

[0065] Steps:

[0066] (1) A mixed solution of nickel sulfate, manganese sulfate and cobalt sulfate (the total concentration of the mixed solution is 2mol / L, of which Ni 2+ , Mn 2+ and Co 2+ The concentration ratio is 5:3:2), the NaOH solution with a concentration of 4mol / L and the ammonia solution with a concentration of 3mol / L are added to the reactor in parallel, the reaction temperature of the reactor is 60°C, and the stirring speed is 1300r / min. Control the reaction The pH of the system is 11, and Ni with a D50 particle size of 5 microns 0.5 co 0.2 mn 0.3 (OH) 2 The ternary material precursor particles are added to the reaction kettle at a rate of 3ml / min, and the liquid overflows naturally;

[0067] (2) Input the material liquid overflowed and discharged in step (1) to the filter device for filtration and washing until no by-product salt sodium sulfate remains, then transfer to the drying device, dry at 120°C for 4 hours, and then pulverize to obtain Ternary mater...

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Abstract

The invention discloses a method for preparing a nickel-cobalt-manganese ternary material precursor. By virtue of the method, waste small-particle-size nickel-cobalt-manganese ternary material precursors in a product are separated out and recycled into a reaction kettle, so that the ternary material precursors with the particle size of 7-15 micro meters account for over 95% in the product.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery cathode materials, in particular to a preparation method of a spherical nickel-cobalt lithium manganese oxide cathode material precursor. Background technique [0002] Lithium-ion batteries are widely used in many fields such as mobile phones, digital cameras, computers, and electric vehicles because of their high energy, long service life, and low pollution. Among them, the cathode material occupies the most important position in the lithium-ion battery structure, and its performance directly determines the performance of the final product lithium-ion battery, and the performance and price of the cathode material will directly affect the performance and price of the lithium-ion battery . [0003] At present, layered lithium cobalt oxide, spinel lithium manganese oxide, lithium iron phosphate, layered nickel cobalt lithium manganese oxide, etc. are mainly used as positive electrode ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 崔妍江卫军张溪苏迎春郝振佳文博李化一
Owner 北京盟固利新材料科技有限公司
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