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Method for preparing nickel-cobalt-manganese alloy powder

A technology of alloy powder and nickel-cobalt-manganese, which is applied in the field of metal powder material preparation, can solve problems such as the difficulty in ensuring effective and uniform mixing of nickel, cobalt, and manganese, and the influence of product consistency, and achieve controllable and adjustable particle size and technological excellence. The effect of good matching and uniform composition

Inactive Publication Date: 2012-06-27
先进储能材料国家工程研究中心有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is difficult to ensure the effective and uniform mixing of nickel, cobalt, and manganese, which affects the consistency of the product

Method used

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  • Method for preparing nickel-cobalt-manganese alloy powder
  • Method for preparing nickel-cobalt-manganese alloy powder
  • Method for preparing nickel-cobalt-manganese alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The elemental metals nickel, cobalt, and manganese are mixed in a molar ratio of 1:1:1. The mixture is heated and melted in an induction furnace under the protection of nitrogen until it is completely melted into a metal liquid. The pressure is 3MPa. Nitrogen sprays the molten and mixed metal liquid into a metal droplet shape, and then cools the metal droplet to solidify it into metal powder particles to obtain nickel-cobalt-manganese alloy powder.

[0021] The SEM of the above alloy powder is like figure 1 As shown, it can be seen that the alloy powder has reached an atomic level of uniform mixing in composition, and the powder particles are regular spherical; its X-ray diffraction pattern is as figure 2 As shown, it can be seen from the figure that the diffraction pattern of the alloy powder is more consistent with the standard diffraction pattern of elemental nickel, but the diffraction peak of the alloy powder is slightly shifted to a low angle, and no other miscellaneo...

Embodiment 2

[0023] The metallic nickel, cobalt, and manganese are mixed in a molar ratio of 1:1:1, and the mixture is heated and melted to a molten liquid in a vacuum induction furnace. Afterwards, a high-pressure water flow with a water pressure of 40 MPa is used to spray the molten metal liquid into small metal droplets, and then the droplets are cooled to solidify them into powder particles to obtain nickel-cobalt-manganese alloy powder. From image 3 It can be seen from the SEM photograph of the alloy powder that the composition of the alloy powder is uniformly mixed at the atomic level, and the powder particles are irregular in shape. After measurement, the alloy powder particle size D50 reaches 30μm, and the bulk density reaches 3.5g / cm 3 , The tap density reaches 4g / cm 3 .

Embodiment 3

[0025] The metallic nickel, cobalt, and manganese are mixed according to a molar ratio of 5:2:3, and the mixture is heated and melted into a molten liquid in a vacuum induction furnace. Afterwards, a 4MPa high-pressure argon gas stream is used to spray the molten metal liquid into small metal droplets, and then the droplets are cooled to solidify them into powder particles to obtain nickel-cobalt-manganese alloy powder. The alloy powder is uniformly mixed in composition at the atomic level, the powder particles are regular spherical, the particle size D50 reaches 45μm, and the loose density reaches 4.98g / cm 3 , The tap density reaches 5.32g / cm 3 .

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Abstract

The invention provides a method for preparing nickel-cobalt-manganese alloy powder. Molten mixed metal liquid is atomized through high-pressure gas or high-pressure water of specific pressure intensity to form particles, and the alloy powder is used for preparing a precursor of a ternary lithium ion battery anode material. The nickel-cobalt-manganese alloy powder prepared by adopting the method has the advantages of uniform and compact components, high density and controllable granularity, so that uniformity, compactness, high density and controllable and adjustable granularity of a nickel-cobalt-manganese oxide precursor prepared in the subsequent prepared ternary material are ensured, the precursor can be mixed with a lithium compound uniformly, and the obtained ternary material has uniform component and high density. The preparation technology and the subsequent ternary material preparation technology do not involve hydrometallurgy, do not product waste water, and are environment-friendly.

Description

Technical field [0001] The invention relates to a method for preparing metal powder materials, in particular to a method for preparing nickel-cobalt-manganese alloy powder. Background technique [0002] At present, the preparation process of ternary materials for lithium-ion batteries mostly uses soluble metal salts of nickel, cobalt, and manganese as raw materials to prepare composite hydroxides or carbonates by liquid-phase precipitation, and the precipitates or their The composite oxide obtained by thermal decomposition is used as the precursor, and finally the precursor and the lithium salt are mixed and roasted to obtain a ternary material. In this method, the disadvantages of the prepared precursor are low product density, difficult to control particle size, long process flow and low production efficiency. In addition, the raw materials used in the liquid phase method are nickel, cobalt sulfate or hydrochloride and ammonia , Strong alkali, etc., when preparing the precurso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 蒋庆来齐士博杨先锋
Owner 先进储能材料国家工程研究中心有限责任公司
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