Coating modification method of ncm622 cathode material

A positive electrode material and coating technology, which is applied in the field of NCM622 positive electrode material coating modification, can solve the problems of small production capacity, expansion of production capacity and performance cannot be taken into account, and achieve the effect of protecting the environment and reducing costs

Active Publication Date: 2020-06-19
QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects that the existing ternary cathode material production capacity is small, and the expansion of production capacity cannot take into account the performance, and a NCM622 cathode material coating modification method is proposed

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  • Coating modification method of ncm622 cathode material
  • Coating modification method of ncm622 cathode material
  • Coating modification method of ncm622 cathode material

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] The invention relates to a 622 power type NCM622 cathode material coating modification method, comprising the following steps:

[0032] 1) Coating: Mix nickel-cobalt-manganese ternary cathode material powder with deionized water at a mass ratio of 1:1, add aluminum sol (manufacturer: Dalian Snow), and react at a constant temperature of 35°C.

[0033] 2) Water washing: Add tap water with the same weight as the material into the mixing tank (the upper edge of the scale corresponds to the water level line of 450Kg material), start stirring, then add the material for water washing and stirring for 20 minutes. The amount of each washing material is controlled at 500-1000Kg.

[0034] After stirring, turn on the air pump, put the slurry into the suction filter tank, then use 10Kg tap water to clean the mixing tank, and put the cleaning slurry into the suction filter tank t...

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Abstract

The invention relates to an NCM622 anode material coating modification method and belongs to the technical field of preparation of electrode materials. The method comprises the following steps: (1) coating: mixing nickel-cobalt-manganese ternary anode material powder with a dispersing agent, adding an alumina sol, and performing thermostatic reaction; (2) water washing: adding stirred material andequal weight of water into a stirring tank, and stirring to obtain a slurry; (3) suction filtration: pumping the sufficiently stirred slurry into a suction filtration tank for suction filtration; and(4) drying: putting the material after suction filtration into a double-cone drying tank for drying, so as to obtain the aluminum coated ternary anode material. According to the invention, the waterwashing cost is lowered based on the procedures of water washing and drying, and therefore, water washing is simpler, suction filtration speed is higher, efficiency is higher, productivity is promotedby more than two times, the production efficiency of a dynamical type ternary anode material is increased, and influence to the performances is avoided.

Description

technical field [0001] The invention relates to a method for coating and modifying NCM622 positive electrode materials, which belongs to the technical field of electrode material preparation. Background technique [0002] With the development of new energy vehicles, the demand for high-capacity and high-cycle ternary materials has increased dramatically. Various battery material manufacturers have extensively carried out the industrial layout of 622 and 811. The production process of the currently known 622 power type ternary cathode materials is relatively complicated and the efficiency is very low, resulting in low production capacity and long time consumption. Small-scale production can often obtain 622 ternary cathode products with excellent performance, but it is difficult to carry out industrial production on a large scale, and the cost of industrial production is very high. Contents of the invention [0003] The purpose of the present invention is to overcome the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 孙琦孙慧英尹元张姝
Owner QINGDAO QIANYUN HIGH TECH NEW MATERIAL
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