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A kind of nickel cobalt aluminum oxide and preparation method thereof

An oxide, nickel-cobalt-aluminum technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as incomplete precipitation of aluminum ions, and achieve the effects of good consistency, high cycle performance, and high charge-discharge capacity

Active Publication Date: 2018-08-07
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the nickel-cobalt-aluminum oxide has a simple process and high controllability, and solves the problem that the aluminum ion precipitation cannot be completely precipitated in the preparation of the nickel-cobalt-aluminum oxide precursor material in the prior art

Method used

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  • A kind of nickel cobalt aluminum oxide and preparation method thereof
  • A kind of nickel cobalt aluminum oxide and preparation method thereof
  • A kind of nickel cobalt aluminum oxide and preparation method thereof

Examples

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preparation example Construction

[0046] Please refer to figure 1 , figure 1 It is a flow chart of the preparation method of nickel-cobalt-aluminum oxide in the present invention, comprising the following steps:

[0047] S01, preparing a mixed salt solution of nickel salt, cobalt salt, aluminum salt and ammonium oxalate solution;

[0048] S02. Add the reaction bottom liquid into the reactor, add the mixed salt solution and the ammonium oxalate solution into the reactor equipped with the reaction bottom liquid, and feed ammonia gas into the reaction liquid to carry out coprecipitation reaction and maintain the reaction The temperature is kept constant in the range of 40-60°C, and the pH value is kept constant in the range of 6.0-8.0. After the feeding is completed, continue to stir and age. After the reaction is completed, the solid-liquid separation is carried out to obtain a solid product, that is, the nickel-cobalt-aluminum oxide precursor;

[0049] S03. After the nickel-cobalt-aluminum oxide precursor is ...

Embodiment 1

[0051] A preparation method of nickel cobalt aluminum oxide, comprising the following steps:

[0052] (1) Weigh nickel chloride, cobalt chloride, and aluminum chloride crystals respectively at a molar ratio of 80:15:5, dissolve in water and mix uniformly to obtain a mixed salt solution of nickel, cobalt and aluminum, and the volume of the mixed salt solution is 20L , the total concentration of nickel ion, cobalt ion, aluminum ion in the mixed salt solution is 80g / L, and preparation concentration is the ammonium oxalate solution of 60g / L;

[0053] (2) Add 3L of pure water to a reaction kettle with a volume of 50L, add ammonium oxalate, make the concentration of ammonium oxalate 5g / L, raise the temperature to 40°C, and then mix the nickel-cobalt-aluminum mixture under stirring conditions Add salt solution and 60g / L ammonium oxalate solution into the reaction kettle, and pass ammonia gas into the reaction solution to carry out co-precipitation reaction. During the feeding process...

Embodiment 2

[0058] A preparation method of nickel cobalt aluminum oxide, comprising the following steps:

[0059] (1) Weigh nickel chloride, cobalt chloride, and aluminum chloride crystals respectively at a molar ratio of 80:15:5, dissolve in water and mix uniformly to obtain a mixed salt solution of nickel, cobalt and aluminum, and the volume of the mixed salt solution is 20L , the total concentration of nickel ion, cobalt ion, aluminum ion in the mixed salt solution is 100g / L, and preparation concentration is the ammonium oxalate solution of 80g / L;

[0060] (2) Add 3L of pure water to a reactor with a volume of 50L, add ammonium oxalate so that the concentration of ammonium oxalate is 10g / L, and the temperature is raised to 50°C, and then the nickel-cobalt-aluminum Add the mixed salt solution and 80g / L ammonium oxalate solution into the reaction kettle, and pass ammonia gas into the reaction solution to carry out coprecipitation reaction. During the feeding process, the pH value is main...

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Abstract

The invention provides a preparation method of a nickel-cobalt-aluminum oxide. The method comprises the following steps: using a mixed salt solution of nickel, cobalt and aluminum as a raw material, precipitating the nickel and the cobalt by ammonium oxalate and not precipitating the aluminum; introducing an ammonia gas to adjust the pH of a reaction system into the range within which Al<3+> forms a hydroxide sediment; controlling the reaction condition and preparing a nickel-cobalt-aluminum oxide precursor; and carrying out burning to obtain the nickel-cobalt-aluminum oxide which is good in degree of sphericity and high in tap density. The preparation method is simple in process, high in controllability and short in time; the nickel, the cobalt and the aluminum can be evenly co-precipitated; and the problem that aluminum ions cannot be completely precipitated in preparation of the nickel-cobalt-aluminum precursor material is solved. The invention further provides the nickel-cobalt-aluminum oxide prepared by the preparation method. The nickel-cobalt-aluminum oxide is regularly spherical, relatively good in degree of sphericity and uniform in particle size; the average particle size is 6-15 microns; the apparent density is greater than 1.2g / cm<3>; the tap density is greater than 1.6g / cm<3>; and the nickel-cobalt-aluminum oxide is suitable for being used as an industrial production positive electrode material for a lithium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of battery material preparation, and in particular relates to a nickel-cobalt-aluminum oxide and a preparation method thereof. Background technique [0002] Lithium-ion batteries are a new generation of green high-energy batteries, which are increasingly playing an important role in various fields. The positive electrode material of lithium batteries determines the performance, price and development of lithium batteries. At present, ternary battery materials (such as nickel-cobalt-aluminum, nickel-cobalt-manganese, etc.) have become research hotspots because of their excellent comprehensive performance. Among them, the preparation of ternary battery material precursors with high tap density and good sphericity is the key to the development of lithium-ion battery materials with charge and discharge capacity, high tap density and high cycle performance. [0003] At present, the precursors of nickel-cobalt-alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/1391
CPCY02E60/10
Inventor 张云河许开华郭苗苗乐绪清刘文泽
Owner JINGMEN GEM NEW MATERIAL
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