Preparation method of nickel cobalt lithium manganate positive electrode material

A technology of nickel cobalt lithium manganate and positive electrode material, which is applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problem of lengthy preparation process of nickel cobalt lithium manganese oxide, etc., and achieves easy automatic control, less time-consuming, product pure effect

Active Publication Date: 2021-07-16
BEIFANG UNIV OF NATITIES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the current preparation process of nickel-cobalt-lithium-manganese-oxide is tedious, the present invention provides a short-process preparation method of nickel-cobalt-lithium-manganese-oxide cathode material

Method used

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  • Preparation method of nickel cobalt lithium manganate positive electrode material
  • Preparation method of nickel cobalt lithium manganate positive electrode material
  • Preparation method of nickel cobalt lithium manganate positive electrode material

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preparation example Construction

[0027] The preparation method of nickel cobalt lithium manganese oxide cathode material of the present invention comprises the following steps:

[0028] (1) According to the molar ratio Li:Ni:Co:Mn:M=(1.0~1.1):x:y:z:η(0≤x, y, z≤1, 0≤η≤0.1 and x+y+ z+η=1) Weighing soluble salts of lithium, nickel, cobalt, manganese and doping elements respectively, and dissolving them in deionized water to form a precursor solution;

[0029] (2) Send the precursor solution to an ultrasonic spray device, atomize it into droplets with a size of 200nm-50μm, and form an aerosol with the carrier gas;

[0030] (3) Send the aerosol to the high-temperature pyrolysis device through the carrier gas for pre-calcination treatment at 800-1200°C for 2-10s, use the carrier gas to transport the pre-calcined intermediate product to the collection device, and collect the solid components to obtain pre-calcination product;

[0031] (4) Transfer the pre-calcined product to heat treatment equipment, and obtain ni...

Embodiment 1

[0036] The preparation method of the nickel cobalt lithium manganese oxide cathode material of the present embodiment comprises the following steps:

[0037] (1) Weigh the acetates of lithium, nickel, cobalt, and manganese respectively according to the molar ratio Li:Ni:Co:Mn=1.06:0.8:0.1:0.1, and dissolve them in deionized water to form a precursor solution;

[0038] (2) Using air as the carrier gas, the precursor solution is sent to an ultrasonic spray device, atomized into droplets with a size of 200nm-50μm, and combined with the carrier gas to form an aerosol;

[0039] (3) Send the aerosol to the high-temperature pyrolysis device through the carrier gas for pre-calcination treatment at 900°C for 2s, use the carrier gas to transport the pre-calcined intermediate product to the collection device, and collect the solid component to obtain the pre-calcined product;

[0040] (4) Transfer the pre-calcined product to heat treatment equipment, and obtain lithium nickel cobalt mang...

Embodiment 2

[0042] The preparation method of the nickel cobalt lithium manganese oxide cathode material of the present embodiment comprises the following steps:

[0043] (1) Weigh the chlorides of lithium, nickel, cobalt, and manganese respectively according to the molar ratio Li:Ni:Co:Mn=1.02:0.8:0.1:0.1, and dissolve them in deionized water to form a precursor solution;

[0044] (2) Using oxygen as the carrier gas, the precursor solution is sent to the ultrasonic spray device, atomized into droplets with a size of 200nm-50μm, and combined with the carrier gas air to form an aerosol;

[0045] (3) Send the aerosol to the high-temperature pyrolysis device through the carrier gas for pre-calcination treatment at 900°C for 2s, use the carrier gas to transport the pre-calcined intermediate product to the collection device, and collect the solid component to obtain the pre-calcined product;

[0046] (4) Transfer the pre-calcined product to heat treatment equipment, and obtain lithium nickel co...

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Abstract

The invention discloses a preparation method of a nickel cobalt lithium manganate positive electrode material. The preparation method comprises the following steps of dissolving soluble salts of lithium, nickel, cobalt and manganese in deionized water to form a precursor solution, sending the precursor solution to an ultrasonic spraying device to be atomized into liquid drops, forming aerosol with carrier gas, sending the aerosol to a high-temperature pyrolysis device through the carrier gas to be pre-calcined, wherein the pre-calcined product is relatively fine in grain, the 003 crystal face development is not complete, the oxidation reaction is not sufficient, and transferring the pre-calcined product to heat treatment equipment to be subjected to high-temperature heat treatment for a plurality of hours in an oxygen or air atmosphere, so that the final product lithium nickel cobalt manganate with complete crystal lattice development can be obtained. The preparation method has the advantages of short process flow, low time consumption, pure product, convenience in realization of automatic control, no waste liquid discharge and the like, and belongs to a green and environment-friendly production technology. Through adopting the preparation method, a ternary nickel-cobalt-manganese composite metal oxide or a single transition metal oxide can be obtained, and a doped modified nickel-cobalt lithium manganate positive electrode material can further be obtained.

Description

technical field [0001] The invention relates to the technical field of positive electrode material preparation, in particular to a preparation method of nickel cobalt lithium manganese oxide positive electrode material. Background technique [0002] At present, the commonly used positive electrode materials in lithium-ion batteries mainly include lithium cobaltate, lithium nickel-cobalt manganate, lithium nickel-cobalt aluminate and lithium iron phosphate. Among them, lithium cobalt oxide, lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminum oxide are usually obtained by co-precipitation method + high-temperature calcination. In the above preparation process, a complexing agent and a precipitating agent need to be added, and after more than 10 hours of precipitation reaction, it needs to be washed and filtered with a large amount of deionized water to reduce the alkali content in the precursor. Then dry, disperse, grind, and then evenly mix with lithium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 王北平卢辉吴建栋王金全晁锋刚崔玉明袁荣忠贾廷庆杨志
Owner BEIFANG UNIV OF NATITIES
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