Preparation method of continuous Ni-Co-Al ternary precursor
A precursor, nickel-cobalt-aluminum technology, which is applied in the field of continuous nickel-cobalt-aluminum ternary precursor preparation, can solve the problems of lowering product quality and less residence time, meeting the cost of manufacturers, reducing crystal nuclei, and facilitating production lines Yield effect
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[0025] A method for preparing a continuous nickel-cobalt-aluminum ternary precursor, using metal salt solution, aluminum alkali, liquid alkali and ammonia solution as raw materials, using four liquid inlet pipes to continuously flow into the reactor for reaction, and passing Control the solution injection speed, PH value, reaction temperature, stirring speed and other parameters to effectively control the chemical impurities and crystal crystallinity, particle size, density, etc. of the lithium battery ternary precursor. The ternary precursor nickel cobalt lithium manganese oxide.
[0026] 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 part...
Embodiment 1
[0030] Embodiment one: preparation concentration is the metal salt solution of 120g / L, the aluminum alkali of 4g / L, the liquid caustic soda of 32g / L, the ammoniacal solution of 12g / L in concentration; , Ammonia solution is added through the corresponding liquid inlet pipe with a size of 5m 3 Reaction in the reaction still; The liquid caustic soda is added to the reaction kettle through the upper liquid inlet pipe, and the aluminum alkali is added to the reaction kettle through the lower liquid inlet pipe. , the flow rate of the lower liquid inlet pipe is 20L / h; the pH in the control reactor is 10, the temperature of the reactor is 40°C, and the average residence time of the material in the reactor is 5 hours, and it is continuously passed into the reactor. Enter nitrogen, turn on the stirring paddle to realize stirring, and the two ends of the stirring paddle are divided into an upper layer stirring paddle positioned at the upper end and a lower layer paddle positioned at the ...
Embodiment 2
[0032] Embodiment two: preparation concentration is the metal salt solution of 120g / L, the aluminum alkali of 6g / L, the liquid caustic soda of 32g / L, the ammonia solution of 25g / L in concentration; , Ammonia solution is added through the corresponding liquid inlet pipe with a size of 5m 3Reaction in the reaction still; The liquid caustic soda is added to the reaction kettle through the upper liquid inlet pipe, and the aluminum alkali is added to the reaction kettle through the lower liquid inlet pipe. , the flow rate of the lower liquid inlet pipe is 20L / h; the pH in the control reactor is 11.5, the temperature of the reactor is 80°C, the average residence time of the material in the reactor is 20 hours, and the continuous flow into the reactor is 20 hours. Enter nitrogen, open the stirring paddle to realize stirring, and the two ends of the stirring paddle are divided into the upper layer stirring paddle positioned at the upper end and the lower layer paddle positioned at the...
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