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Coating method of nickel cobalt lithium manganate ternary positive electrode material

A technology of lithium nickel cobalt manganese oxide and positive electrode materials, which is applied in the direction of positive electrodes, electrical components, battery electrodes, etc., can solve the problems of uneven coating and poor performance, achieve short process time, reduce usage and cost, The effect of preventing destruction

Active Publication Date: 2020-10-13
HAIKE GRP RES INST OF INNOVATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical problems of uneven coating and poor performance after coating when coating nickel-cobalt lithium manganese oxide ternary positive electrode material in the above-mentioned background technology, and provides a coating of nickel-cobalt lithium manganese oxide ternary positive electrode material. method, uniform coating, good cycle performance after coating, simple operation, and easy industrial production

Method used

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  • Coating method of nickel cobalt lithium manganate ternary positive electrode material
  • Coating method of nickel cobalt lithium manganate ternary positive electrode material
  • Coating method of nickel cobalt lithium manganate ternary positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Fluidization of matrix material:

[0049] LiN with a particle size of 3 μm 0.50 co 0.20 mn 0.30 o 2 The finished material (produced by Peking University Xianxing Company) is added into the fluidized bed cavity through the upper feed fluidization port of the fluidized bed, and the frequency of the main air inlet fan of the blower, the auxiliary air inlet fan of the blower and the induced draft fan are set to 40Hz in turn , 50Hz and 20Hz, set the air inlet temperature of the blower to 200°C, so as to quickly dry the coated material. Both the motor frequency of the horizontal stirring paddle and the vertical stirring paddle are set to 50HZ. Set the fluidization time of the matrix material to 20 minutes, and the matrix material realizes disordered and uniform fluidization in the chamber under the multiple effects of the main air inlet of the blower and the auxiliary air inlet of the blower, its own gravity, horizontal stirring and vertical stirring.

[0050] Configure ...

Embodiment 2

[0056] Fluidization of matrix material:

[0057] LiNi with a particle size of 5 μm 0.60 co 0.20 mn 0.20 o 2 The finished material (produced by Peking University Xianxing Company) is added into the fluidized bed cavity through the upper feed fluidization port of the fluidized bed, and the frequency of the main air inlet fan of the blower, the auxiliary air inlet fan of the blower and the induced draft fan are set to 40Hz in turn , 50Hz and 20Hz, set the air inlet temperature of the blower to 180°C to quickly dry the coated material. Both the motor frequency of the horizontal stirring paddle and the vertical stirring paddle are set to 50HZ. Set the fluidization time of the matrix material to 40 minutes, and the matrix material realizes disordered and uniform fluidization in the cavity under the multiple actions of the main air inlet of the blower and the auxiliary air inlet of the blower, its own gravity, horizontal stirring and vertical stirring.

[0058] Configure coating...

Embodiment 3

[0070] The fluidization process of the matrix material and the process of configuring the coating solution are the same as in Example 2.

[0071] Coating and Drying:

[0072] The coating solution was fed into the cavity from the top and middle atomization ports of the fluidized bed by a top-middle common atomization method through a peristaltic pump, and the feeding rate was 25 mL / min. The coating solution is atomized to coat the matrix material, and the coating solution is completely atomized and dried at 80° C. for 20 minutes. Stop the blower, induced draft fan, and vertical paddle motor successively, and set the frequency of the horizontal paddle motor to discharge frequency 15Hz. Open the discharge port, take out the dry coating material and turn off the motor of the horizontal stirring paddle.

[0073] The coated material was sintered at 750° C. for 7 hours in an air atmosphere, and the sintered material was crushed to obtain a coated nickel-cobalt-lithium-manganese-oxi...

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Abstract

The invention discloses a coating method of a nickel cobalt lithium manganate ternary positive electrode material, and belongs to the technical field of preparation of lithium ion battery electrode materials. The method comprises the following steps of: 1) adding the nickel cobalt lithium manganate ternary positive electrode material into a cavity of a fluidized bed for fluidization to obtain a fluidized nickel cobalt lithium manganate ternary positive electrode material; 2) atomizing a coating solution at an atomizing port of the fluidized bed to obtain an atomized coating solution; and 3) adding the atomized coating solution into the cavity of the fluidized bed, carrying out mist flow coating on the fluidized lithium nickel cobalt manganese oxide ternary positive electrode material, anddrying to obtain a coated lithium nickel cobalt manganese oxide ternary positive electrode material. The catalyst prepared by the method is high in activity, easy to separate after reaction, reusable,simple in preparation process and low in cost.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium-ion battery electrode materials, in particular to a coating method for nickel-cobalt-lithium-manganese-oxide ternary positive electrode materials. Background technique [0002] Lithium-ion batteries are composed of positive electrode materials, negative electrode materials, electrolytes, separators, casings, etc., and the performance of positive electrode materials directly determines the energy density of lithium-ion batteries. Nickel-cobalt lithium manganate ternary cathode material, as the "dark horse" of lithium battery cathode materials that has emerged in recent years, has attracted extensive research due to its incomparable advantages such as high energy density and power density, and excellent cycle performance. And has been successfully applied in the field of electric vehicle passenger vehicles. However, due to the characteristics of the ternary material's own structure, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/62H01M4/628H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 崔云龙苗力孝牛庆荣魏志凯谢芳鞠署元
Owner HAIKE GRP RES INST OF INNOVATION & TECH
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