Preparation method of continuous nickel-cobalt-manganese ternary precursor

A precursor, nickel-cobalt-manganese technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems of over-burning of crystal nucleus, rising cost, material loss, etc. The effect of the manufacturer's cost

Inactive Publication Date: 2018-03-30
HUNAN ZOOMWE NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the subsequent sintering process, crystal nuclei (also called extremely small particles) are prone to overburning, so it is undesirable for cathode material manufacturers
Precursor manufacturers generally use filter cloth to filter through or dry to separate part of the crystal nuclei. Although it can meet the requirements of cathode material manufacturers (D0>3μm), this will inevitably lead to material loss and yield decline, resulting in The cost is rising, which is also the mainstream method of last resort

Method used

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preparation example Construction

[0023] A method for preparing a continuous nickel-cobalt-manganese ternary precursor, using metal salt solution, liquid caustic soda and ammonia solution as raw materials, using four liquid inlet pipes to continuously flow into the reactor for reaction, and injecting the solution by controlling Speed, PH value, reaction temperature, stirring speed and other parameters can effectively control the chemical impurities and crystal crystallinity, particle size, density, etc. of the lithium battery ternary precursor. Precursor lithium nickel cobalt manganese oxide.

[0024] It should be noted that the flow ratio of the upper and lower liquid inlet pipes in the invention is 1:0.1~10, here the flow ratio of the upper liquid inlet pipe and the lower liquid inlet pipe can be 1:0.1~10; The flow ratio between the liquid inlet pipe and the upper liquid inlet pipe is 1:0.1~10, which can achieve the effect of reducing the number of crystal nuclei and increasing the particle size of the cryst...

Embodiment 1

[0028] Embodiment 1: the preparation concentration is the metal salt solution of 120g / L, the liquid caustic soda with the concentration of 32g / L, and the ammonia solution with the concentration of 12g / L; Tube join size 5m 3 reaction in the reaction kettle; the liquid caustic soda flows into the reaction kettle in parallel by two liquid inlet pipes up and down, the flow of the upper liquid inlet pipe is 60L / h, and the flow of the lower liquid inlet pipe is 20L / h; control the pH in the reaction kettle 10. The temperature of the reactor is 40°C, and the average residence time of the materials in the reactor is 5 hours. Nitrogen is continuously fed into the reactor, and the stirring paddle is turned on to realize stirring. The two ends of the stirring paddle are divided into The upper stirring paddle at the upper end and the lower stirring paddle at the lower end, the stirring speed of the stirring paddle is controlled to be 50r / min, and the lower liquid inlet pipe of the liquid c...

Embodiment 2

[0030] Embodiment two: the preparation concentration is the metal salt solution of 120g / L, the liquid caustic soda of 32g / L, the ammoniacal solution of 25g / L; Tube join size 5m 3 Reaction in the reactor; The liquid caustic soda flows into the reactor in parallel by two liquid inlet pipes up and down, the flow of the upper liquid inlet pipe is 40L / h, and the flow of the lower liquid inlet pipe is 20L / h; the pH in the control reactor 11.5, the temperature of the reactor is 80°C, and the average residence time of the materials in the reactor is 20 hours. Nitrogen is continuously fed into the reactor, and the stirring paddle is turned on to realize stirring. The two ends of the stirring paddle are divided into The upper stirring paddle at the upper end and the lower stirring paddle at the lower end, the stirring speed of the stirring paddle is controlled to be 200r / min, and the lower liquid inlet pipe of the liquid caustic soda is arranged at the same horizontal position as the me...

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Abstract

The invention relates to a preparation method of a continuous nickel-cobalt-manganese ternary precursor. The method comprises the following steps: preparing a metal salt solution, liquid caustic sodaand an ammonia water solution with a certain concentration; connecting a reaction kettle with two liquid caustic soda inlet pipes, a metal salt solution inlet pipe and an ammonia water solution inletpipe, wherein a liquid outlet of one liquid caustic soda inlet pipe is higher than a liquid outlet of the other liquid caustic soda inlet pipe; respectively and correspondingly inputting correspondingsolutions into the four liquid inlet pipes in parallel so as to enable the corresponding solutions to flow into the reaction kettle; conveying the reacted solution in the reaction kettle to an ageingtank for ageing, washing and drying to obtain the nickel-cobalt-manganese ternary precursor. Through the preparation method of the continuous nickel-cobalt-manganese ternary precursor, the prepared lithium-ion battery positive electrode material is high in performance; the yield of the production line of lithium battery products is improved; through a method of pouring the liquid caustic soda intwo liquid inlet pipes, the upper liquid inlet pipe shunts one part of liquid caustic soda and enables the part of liquid caustic soda to enter the reaction kettle; the local pH in the reaction area of the prior art is reduced; the crystal nucleuses can be obviously reduced; and D0 is increased.

Description

technical field [0001] The invention relates to the preparation of lithium-ion battery cathode materials, in particular to a preparation method of a continuous nickel-cobalt-manganese ternary precursor. Background technique [0002] With the continuous development of my country's economy and technology, the use of energy has also increased, especially the rapid development of industry, which consumes a lot of battery energy, and the harmful substances produced are likely to cause damage to the ecological environment. Therefore, the country puts forward higher requirements on the use of energy, not only to improve the efficiency of energy use, but also to achieve energy conservation and emission reduction, and to strengthen the purpose of natural ecological protection. Therefore, it is extremely important to improve the structure of battery energy devices, especially the preparation of high-purity battery energy materials. [0003] Nickel-cobalt-manganese ternary materials a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
CPCC01G53/006C01P2004/51C01P2004/61
Inventor 朱忠泗涂勇尹桂珍刘兴国
Owner HUNAN ZOOMWE NEW ENERGY TECH CO LTD
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