A kind of preparation method of single crystal nickel cobalt lithium manganate ternary material

A technology of nickel cobalt lithium manganate and ternary materials, applied in chemical instruments and methods, nickel compounds, electrical components, etc., can solve problems such as rate performance, poor cycle performance and capacity, and achieve good rate performance, high commercial value, High volume effect

Active Publication Date: 2022-08-05
HUBEI RT ADVANCED MATERIALS CO LTD
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for preparing a single crystal nickel-cobalt lithium manganese oxide ternary material in order to overcome the problems of poor rate performance, cycle performance and capacity of the ternary nickel-cobalt lithium manganese oxide material in the prior art. The method can obtain small particle single crystal materials with high capacity, good rate performance and good cycle performance

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  • A kind of preparation method of single crystal nickel cobalt lithium manganate ternary material
  • A kind of preparation method of single crystal nickel cobalt lithium manganate ternary material
  • A kind of preparation method of single crystal nickel cobalt lithium manganate ternary material

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[0034] The invention provides a preparation method of a single crystal nickel cobalt lithium manganate ternary material, the method comprises the following steps:

[0035] (1) mixing the lithium source and the ternary single crystal precursor in a mass ratio (0.8-1.2): 1, then heating and calcining to obtain an agglomerate structure seed crystal with a D50 of 9-12 μm;

[0036](2) mixing the agglomerate structure seed obtained in step (1) with a ternary single crystal precursor and a lithium source to obtain a mixture, and then heating and calcining to obtain a single crystal nickel cobalt lithium manganate ternary material;

[0037] Wherein, the ternary single crystal precursor is Ni x Co y Mn z (OH) 2 , 0.5≤x≤1, 0≤y≤0.4, 0≤z≤0.4, x+y+z=1;

[0038] In step (2), the mixture contains 1-5% by weight of aggregate structure seeds;

[0039] In step (2), the ratio of the amount of the lithium element in the lithium source to the total amount of the three elements of nickel, coba...

Embodiment 1

[0060] (1) Lithium carbonate and ternary 523 single crystal precursor Ni 0.5 Co 0.2 Mn 0.3 (OH) 2 Mix evenly with a VC mixer at a mass ratio of 0.8:1, then put the materials into a muffle furnace, and in an air atmosphere, heat up to 700°C for 20h at a heating rate of 5°C / min to obtain agglomerates with a D50 of 10.45μm body structure seed;

[0061] (2) adding the agglomerate structure seed obtained in step (1), the ternary 523 single crystal precursor and lithium carbonate into a high-mixer and mixing uniformly to obtain a mixture, the amount of the lithium element in the lithium carbonate is the same as that of the three The ratio of the total amount of the three elements of nickel, cobalt, and manganese in the Yuan 523 single crystal precursor is 1.08:1, and the mixture contains 1% by weight of agglomerate structure seeds, and then the mixture is put into a muffle furnace. In an air atmosphere, the temperature was raised to 700°C for 3 h at a heating rate of 3°C / min, an...

Embodiment 2

[0063] (1) Lithium carbonate and ternary 523 single crystal precursor Ni 0.5 Co 0.2 Mn 0.3 (OH) 2 Mix evenly with a VC mixer at a mass ratio of 1.2:1, then put the material into a muffle furnace, and in an air atmosphere, raise the temperature to 750°C at a heating rate of 3°C / min for 24 hours, and obtain agglomerates with a D50 of 11.68 μm. body structure seed;

[0064] (2) adding the agglomerate structure seed obtained in step (1), the ternary 523 single crystal precursor and lithium carbonate into a high-mixer and mixing uniformly to obtain a mixture, the amount of the lithium element in the lithium carbonate is the same as that of the three The ratio of the total amount of nickel, cobalt, and manganese in the element 523 single crystal precursor is 1.03:1, and the mixture contains 5% by weight of agglomerate structure seeds, and then the mixture is put into a muffle furnace, and the mixture is placed in a muffle furnace. In an air atmosphere, the temperature was raised...

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Abstract

The invention relates to the technical field of lithium ion batteries, and discloses a preparation method of a single crystal nickel cobalt lithium manganate ternary material. The method includes: (1) mixing a lithium source and a ternary single crystal precursor in a mass ratio of (0.8-1.2): 1 to obtain a mixture, then heating and calcining to obtain an agglomerate structure with a D50 of 9-12 μm seed crystal; (2) mixing the agglomerate structure seed crystal obtained in step (1) with a ternary single crystal precursor and a lithium source to obtain a mixture, and then heating and calcining to obtain a single crystal nickel cobalt lithium manganate ternary Material. The method can obtain single crystal material with small particles, high capacity, good rate performance and good cycle performance; the preparation process is simple, the obtained single crystal has good shape, round particles and good primary particle size consistency, and has high commercial value.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a single crystal nickel cobalt lithium manganate ternary material. Background technique [0002] In recent years, with the development of smart phones and portable personal computers, there is a great market demand for small-sized and lightweight secondary batteries with high energy density. At the same time, high-power secondary batteries also have great market demand, especially in transportation equipment such as automobiles and drones. [0003] Lithium-ion secondary batteries can meet the above-mentioned needs, and since the 1990s, Sony successfully introduced LiCoO 2 After being introduced to the commercial market, lithium-ion batteries have been widely used in various mobile terminal equipment such as mobile phones and notebooks at home and abroad due to their high specific capacity, long cycle life, and good safety performance. In ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525C01G53/00
CPCH01M4/505H01M4/525H01M10/0525C01G53/44H01M2004/028Y02E60/10
Inventor 何雅梅京孙杰姚远何中林
Owner HUBEI RT ADVANCED MATERIALS CO LTD
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