Method for continuously and quickly preparing high-nickel nickel-cobalt-manganese ternary material precursor

A ternary material and precursor technology, used in electrical components, battery electrodes, circuits, etc., can solve the problems of long preparation cycle, uncontrollable reaction process, and difficult to control product particle size, and achieve good particle size uniformity and shortening. Production cycle, effect with industrial applicability

Inactive Publication Date: 2018-04-03
陈训财
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the patent (CN104835957 A) discloses a method for preparing a high-nickel ternary material used in lithium-ion batteries. The precursor is prepared by mixing nickel salt, cobalt salt, and manganese salt in a molar ratio of 6:2:2. The mixed solution of NaOH, complexing agent, chelating agent and additives are co-precipitated in a four-neck flask to prepare the precursor of high-nickel ternary material (Ni 0.6 co 0.2 mn 0.2 )O 2 , although the synthesis method is simple in equipment, it needs to be prepared in batches, the preparation cycle is long, the reaction process is uncontrollable, and the particle size of the product is difficult to control, which limits its wide application in industry.

Method used

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  • Method for continuously and quickly preparing high-nickel nickel-cobalt-manganese ternary material precursor
  • Method for continuously and quickly preparing high-nickel nickel-cobalt-manganese ternary material precursor
  • Method for continuously and quickly preparing high-nickel nickel-cobalt-manganese ternary material precursor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Steps:

[0050] (1) A mixed solution of nickel sulfate, manganese sulfate and cobalt sulfate (the total concentration of the mixed solution is 3mol / L, of which Ni 2+ , Mn 2 + and Co 2+ The concentration ratio is 9:0.5:0.5) using a peristaltic pump to blow into the reaction tank of the Taylor vortex crystallizer at a flow rate of 10mL / min. The process flow is as follows figure 1 As shown; at the same time, the NaOH solution with a concentration of 6mol / L and the ammonia solution with a concentration of 1mol / L are fed into the reaction tank in parallel at the flow rate of 10mL / min and 1mL / min respectively through two peristaltic pumps, and the vortex crystallizer is used to The temperature control system, adjust the reaction tank reaction temperature to 50 o C. The rotation speed of the inner column of the crystallizer driven by the motor is set to 1000rpm, and the pH of the entire reaction system is controlled to be 12. The feed liquid in the reaction tank in the T...

Embodiment 2

[0053] Steps:

[0054] (1) A mixed solution of nickel sulfate, manganese sulfate and cobalt sulfate (the total concentration of the mixed solution is 3mol / L, of which Ni 2+ , Mn 2 + and Co 2+ The concentration ratio is 8:1:1) using a peristaltic pump to blow into the reaction tank of the Taylor vortex crystallizer at a flow rate of 10mL / min. The process flow is as follows figure 1 As shown; at the same time, the NaOH solution with a concentration of 6mol / L and the ammonia solution with a concentration of 1mol / L are fed into the reaction tank in parallel at the flow rate of 10mL / min and 1mL / min respectively through two peristaltic pumps, and the vortex crystallizer is used to The temperature control system, adjust the reaction tank reaction temperature to 50 o C. The rotation speed of the inner column of the crystallizer driven by the motor is set to 1000rpm, and the pH of the entire reaction system is controlled to be 12. The feed liquid in the reaction tank in the Taylo...

Embodiment 3

[0057] Steps:

[0058] (1) A mixed solution of nickel sulfate, manganese sulfate and cobalt sulfate (the total concentration of the mixed solution is 3mol / L, of which Ni 2+ , Mn 2 + and Co 2+ The concentration ratio is 7:1.5:1.5) using a peristaltic pump to blow into the reaction tank of the Taylor vortex crystallizer at a flow rate of 10mL / min. The process flow is as follows figure 1 As shown; at the same time, the NaOH solution with a concentration of 6mol / L and the ammonia solution with a concentration of 1mol / L are fed into the reaction tank in parallel at the flow rate of 10mL / min and 1mL / min respectively through two peristaltic pumps, and the vortex crystallizer is used to The temperature control system, adjust the reaction tank reaction temperature to 50 o C. The rotation speed of the inner column of the crystallizer driven by the motor is set to 1000 rpm, and the pH of the entire reaction system is controlled to be 12. The feed liquid in the reaction tank in the ...

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Abstract

The invention belongs to the field of a positive electrode material of a lithium ion battery, and particularly relates to a method for continuously and quickly preparing a high-nickel nickel-cobalt-manganese ternary material precursor. According to the method for continuously and quickly preparing the high-nickel nickel-cobalt-manganese ternary material precursor, the ternary material precursor is(Ni<x>Co<y>Mn<z>)O<2>, wherein x+y+z is equal to 1; x is greater than or equal to 0.5; y is less than or equal to 0.4; and z is less than or equal to 0.4. According to the method, based on a Taylor vortex flow principle in the production method, the reactants are reacted fully to accelerate a crystallization reaction, thereby quickly preparing the spherical nickel-cobalt-manganese ternary material precursor; in addition, the precursor is controllable in granular size, high in granular size uniformity and high in product tap density; and the high-nickel ternary material can be continuously andquickly prepared by adopting a Taylor vortex crystallizer, so that the characteristics of simple preparation process, easy realization of industrialization and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion positive electrode materials, in particular to a continuous and rapid preparation method for a precursor of a spherical high-nickel nickel-cobalt lithium manganese oxide positive electrode material precursor. Background technique [0002] Lithium-ion batteries have the advantages of high energy, long service life, low pollution, no memory effect, and low self-discharge, and are widely used in many fields such as mobile phones, digital cameras, computers, and electric vehicles. In the entire composition of lithium-ion batteries, the positive electrode material occupies a very important position, and its performance directly determines the performance of the final product lithium-ion battery, and its price also directly affects the cost of lithium-ion batteries. [0003] At present, the lithium battery cathode materials that have been commercially applied mainly include lithium cobaltate, lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 陈训财
Owner 陈训财
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