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Lithium nickel cobalt manganese oxide and preparation method and application thereof

A technology of nickel cobalt lithium manganate and nickel cobalt manganese is applied in the field of ternary cathode materials for lithium ion batteries, which can solve the problems of poor high temperature cycle and high temperature flatulence of batteries, and achieves improvement of high temperature flatulence, clean and environmentally friendly operation, and good appearance. Effect

Active Publication Date: 2022-05-27
HEFEI RONGJIE ENERGY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, high-nickel ternary materials will have the problems of battery high-temperature flatulence and poor high-temperature cycle. How to improve the high-temperature performance of high-nickel ternary materials is the key to mass production of materials.

Method used

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  • Lithium nickel cobalt manganese oxide and preparation method and application thereof
  • Lithium nickel cobalt manganese oxide and preparation method and application thereof
  • Lithium nickel cobalt manganese oxide and preparation method and application thereof

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preparation example Construction

[0026] A first aspect of the present invention discloses a preparation method of nickel cobalt lithium manganate, which mainly includes the following steps:

[0027] S100, one-time mixing

[0028] Specifically, the nickel-cobalt-manganese precursor and the lithium source are mixed uniformly to obtain a mixture one; wherein, the nickel-cobalt-manganese precursor is the nickel-cobalt-manganese hydroxide Ni x Co y Mn 1-x-y (OH) 2 , in the general chemical formula, 0x Co y Mn 1-x-y (OH) 2 Among them, 7≤xx Co y Mn 1-x-y (OH) 2 And the lithium source is 1.02-1.08 according to the molar ratio of lithium and nickel-cobalt-manganese precursor; it can be understood that the selection of the lithium source in the present invention is a conventional selection in the field, and there is no special limitation. Examples are lithium hydroxide or lithium carbonate.

[0029] Further, in the process of obtaining the mixed material 1, the mixing parameters of the raw materials are not...

Embodiment 1

[0043] S1. Primary mixing: Ni with a particle size of 3-4 μm is taken according to the molar ratio of lithium and precursor of 1.05. 0.7 Co0.1 Mn 0.2 (OH) 2 Mixing with lithium hydroxide at 500rpm / min for 25min in a high-speed mixer to obtain mixture 1;

[0044] S2. One-time sintering: put the mixed material into a sagger, shake it up and draw a line, sinter at 800 ° C for 12 hours, and pulverize the material after the first sintering by a jet mill. The classification frequency of the pulverizer is 5 Hz. , the feeding frequency is 20 Hz, and the primary sintered nickel-cobalt lithium manganate with a particle size D50 of 4.5 μm is obtained;

[0045] S3, secondary mixing: mixing the primary sintered nickel-cobalt lithium manganate with 1400ppm of zirconium dioxide and 900ppm of sodium carbonate in a high-speed mixer at 500rpm / min for 25min to obtain a mixture two;

[0046] S4. Secondary sintering: put the mixed material 2 into the sagger, shake it up and draw a line, sinter ...

Embodiment 2

[0048] S1. Primary mixing: Ni with a particle size of 3-4 μm is taken according to the molar ratio of lithium and precursor of 1.05. 0.7 Co 0.1 Mn 0.2 (OH) 2 Mixing with lithium carbonate at 500rpm / min for 25min in a high-speed mixer to obtain mixture 1;

[0049] S2. One-time sintering: put the mixed material into a sagger, shake it up and draw a line, sinter at 800 ° C for 12 hours, and pulverize the material after the first sintering by a jet mill. The classification frequency of the pulverizer is 5 Hz. , the feeding frequency is 20 Hz, and the primary sintered nickel-cobalt lithium manganate with a particle size D50 of 4.2 μm is obtained;

[0050] S3, secondary mixing: mixing the primary sintered nickel cobalt lithium manganate with 600ppm of zirconium dioxide and 300ppm of sodium carbonate in a high-speed mixer at 500rpm / min for 25min to obtain a mixture two;

[0051] S4. Secondary sintering: put the mixed material 2 into the sagger, shake it up and draw a line, sinter...

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Abstract

The invention discloses lithium nickel cobalt manganate and a preparation method and application thereof.The preparation method comprises the steps that a nickel cobalt manganese precursor Ni < x > Co < y > Mn < 1-x-y > (OH) < 2 > and a lithium source are evenly mixed to obtain a first mixture, x is larger than 0 and smaller than 1, y is larger than 0 and smaller than 1, and x + y is smaller than 1; carrying out primary sintering on the mixture I to obtain primary sintered lithium nickel cobalt manganese oxide; uniformly mixing the primarily sintered lithium nickel cobalt manganese oxide with zirconium dioxide and sodium carbonate to obtain a mixture II; the second mixture is subjected to secondary sintering, and secondary sintered lithium nickel cobalt manganese oxide is obtained. The nickel cobalt lithium manganate prepared by the preparation method has excellent high-temperature cycle performance, the problem of high-temperature flatulence is solved, and the process is clean and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of ternary positive electrode materials for lithium ion batteries, and particularly relates to a preparation method of nickel-cobalt lithium manganate, the nickel-cobalt lithium manganate prepared by the preparation method, and the nickel-cobalt lithium manganate described above. Application in the preparation of lithium-ion batteries. Background technique [0002] At present, the cathode materials of lithium-ion batteries are mainly lithium cobalt oxide, ternary materials and lithium iron phosphate. Compared with other cathode materials, ternary materials have the most advantages in comprehensive performance. Compared with lithium cobalt oxide, the price is lower, the safety is better, and the voltage is higher than that of lithium iron phosphate. It can be used in small batteries for mobile phones and notebook computers, as well as for electric vehicles. Large-scale power lithium batteries have huge marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525
CPCC01G53/50H01M4/525H01M4/505C01P2004/03C01P2004/61Y02E60/10
Inventor 李刚朱二涛徐涛胡刚刚赵亚楠陆胡彪吴胜坤
Owner HEFEI RONGJIE ENERGY MATERIALS CO LTD