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High-density spherical nickel-cobalt-aluminum precursor material and preparation method thereof

A spherical nickel-cobalt-aluminum precursor technology, which is applied in the direction of nickel oxide/nickel hydroxide, electrical components, battery electrodes, etc., can solve the problems of unsatisfactory electrical performance indicators of nickel-cobalt-aluminum cathode materials and difficult uniform distribution of aluminum elements, etc. Achieve the effects of high degree of automation, uniform distribution, and increased production capacity

Active Publication Date: 2015-09-23
JINCHI ENERGY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ni was synthesized by chemical co-precipitation method 1-x-y co x al y (OH) 2+y In the process of precursor materials, since aluminum ions are +3 valence, it is difficult to form a uniform single layer structure with +2 valence ion elements such as nickel and cobalt, which makes it difficult for aluminum elements to form a uniform distribution in the precursor material. state, which will result in unsatisfactory electrical properties of the nickel-cobalt-aluminum cathode material prepared using this raw material

Method used

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  • High-density spherical nickel-cobalt-aluminum precursor material and preparation method thereof
  • High-density spherical nickel-cobalt-aluminum precursor material and preparation method thereof
  • High-density spherical nickel-cobalt-aluminum precursor material and preparation method thereof

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Embodiment 1

[0027] a kind of like figure 1 The high-density spherical nickel-cobalt-aluminum precursor material shown, the chemical molecular formula of the nickel-cobalt-aluminum precursor material is Ni 0.815 co 0.15 Al 0.035 (OH) 2+0.035 , that is, the atomic molar ratio of Ni, Co, Al and (OH) in the chemical molecular formula is 0.815:0.15:0.035:2.035; the tap density of the nickel-cobalt-aluminum precursor material is 2.25g / cm 3 , the nickel-cobalt-aluminum precursor material is in the shape of spherical particles, and D 50 Particle size is 11.5μm (see figure 2 ).

[0028] The preparation method of the high-density spherical nickel-cobalt-aluminum precursor material of this embodiment comprises the following steps:

[0029] 1. Mix the aluminum nitrate solution and the complexing agent sodium hydroxide at a molar ratio of 1:3.0 to prepare a mixed solution A with an ion concentration of 2.5g / L in terms of aluminum; then dissolve nickel sulfate and cobalt sulfate in water respect...

Embodiment 2

[0036] A high-density spherical nickel-cobalt-aluminum precursor material of the present invention, the chemical molecular formula of the nickel-cobalt-aluminum precursor material is Ni 0.75 co 0.15 Al 0.10 (OH) 2.10 , that is, the atomic molar ratio of Ni, Co, Al and (OH) in the chemical molecular formula is 0.75:0.15:0.10:2.10; the tap density of the nickel-cobalt-aluminum precursor material is 1.90g / cm 3 , the nickel-cobalt-aluminum precursor material is in the shape of spherical particles, and D 50 Particle size is 10.9μm (see Figure 4 ).

[0037] The preparation method of the high-density spherical nickel-cobalt-aluminum precursor material of this embodiment comprises the following steps:

[0038] 1. Mix the aluminum nitrate solution and the complexing agent ethylenediaminetetraacetic acid in a molar ratio of 1:0.25 to prepare a mixed solution A with an ion concentration of 9g / L in terms of aluminum; then mix nickel sulfate and cobalt sulfate with water After disso...

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Abstract

The invention discloses a high-density spherical nickel-cobalt-aluminum precursor material. The chemical molecular formula of the nickel-cobalt-aluminum precursor material is Ni1-x-yCoxAly(OH)2+y, and its tap density is 1.8-2.4g / cm3. The material is in the form of spherical particles with an average particle size of 6-17 μm. The invention also discloses a preparation method of the precursor material, comprising the following steps: firstly mix the aluminum salt and the complexing agent uniformly, then mix the nickel salt and the cobalt salt solution uniformly, mix the aforementioned mixed solution, the complexing agent and the precipitating agent The solution is added to the reactor in parallel for continuous co-precipitation reaction. During the reaction, the pH value is controlled at 11-12, and the residence time of the material in the reactor does not exceed 20h. After a stable reaction, solid-liquid separation is carried out. The solid material is aged After melting, washing and drying, a high-density spherical nickel-cobalt-aluminum precursor material is obtained. In the product of the invention, the aluminum element can be uniformly combined with the nickel and cobalt elements, and the tap density is higher.

Description

Technical field [0001] The present invention involves an anterior drive material and its preparation method for a lithium -ion battery orthopedic material, especially the preparation method of nickel -cobalt aluminum materials in a lithium -ion battery in a lithium -ion battery. Background technique [0002] Lithium -ion batteries have been widely used in various mobile electronic products (such as mobile phones, cameras, laptops, etc.), and will be more and more applied to electric vehicles and other fields.In order to meet the growing needs of these applications, the demand for secondary batteries with larger capacity, lighter weight, and smaller size has continued to increase.The higher the requirements. [0003] Among the positive electrode materials that can be applied to a lithium -ion battery, the positive electrode material of high nickel system has always been a research hotspot in the world.Among them, linio 2 Based on the positive electrode material of the CO element s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04H01M4/50H01M4/52H01M4/48
CPCY02E60/10
Inventor 张海艳周勤俭胡志兵刘伟刘庭杰徐浩甘胜孙卓覃事彪张臻
Owner JINCHI ENERGY MATERIALS CO LTD
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