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Ternary positive electrode material of lithium ion battery and preparation method and application thereof

A technology for lithium ion batteries and positive electrode materials, which is applied in battery electrodes, positive electrodes, electrical components, etc. to achieve the effects of excellent cycle stability, regular morphology, and high-quality specific capacity.

Inactive Publication Date: 2020-02-18
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although it can achieve excellent particle morphology, it is modified by doping rare earth elements, which cannot avoid the disadvantages of NMC's own cycle and poor magnification.

Method used

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  • Ternary positive electrode material of lithium ion battery and preparation method and application thereof

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Embodiment 1

[0041] This embodiment provides a lithium-ion battery ternary positive electrode material, the chemical general formula of the lithium-ion battery ternary positive electrode material is LiNi 0.5 co 0.2 mn 0.3 Zn 0.02 f 0.04 o 2 The preparation method of this lithium-ion battery ternary cathode material is as follows:

[0042] (1) Weigh 1000g of Li according to the ratio of lithium matching amount 1.08 2 CO 3 and 2285g commercially available ternary precursor (Ni 0.5 co 0.2 mn 0.3 )(OH) 2 , add 13.9g zinc fluoride ZnF 2 As a modified material, add deionized water at a solid-to-liquid ratio of 2:1, then add a certain amount of dispersant, and use a high-speed mixer to stir and mix for 1 hour to form a stable slurry;

[0043] (2) Spray drying the above slurry, the inlet temperature is 240°C, and the outlet temperature is 90°C;

[0044] (3) Put the dried powder in an atmosphere furnace at 500°C, keep it in a nitrogen atmosphere for 6 hours, pass it through a 200-mesh s...

Embodiment 2

[0048] This embodiment provides a lithium-ion battery ternary positive electrode material, the chemical general formula of the lithium-ion battery ternary positive electrode material is LiNi 0.5 co 0.2 mn 0.3 Al 0.01 f 0.03 o 2 The preparation method of this lithium-ion battery ternary cathode material is as follows:

[0049] (1) Weigh 1000g of Li according to the ratio of lithium matching amount 1.08 2 CO 3 and 2285g commercially available ternary precursor (Ni 0.5 co 0.2 mn 0.3 )(OH) 2 , add 5.7g aluminum fluoride AlF 3 As a modified material, add deionized water at a solid-to-liquid ratio of 2:1, then add a certain amount of dispersant, and use a high-speed mixer to stir and mix for 1 hour to form a stable slurry;

[0050] (2) Spray drying the above slurry, the inlet temperature is 240°C, and the outlet temperature is 90°C;

[0051] (3) Put the dried powder in an atmosphere furnace at 500°C, keep it in a nitrogen atmosphere for 6 hours, pass it through a 200-mes...

Embodiment 3

[0054] This embodiment provides a lithium-ion battery ternary positive electrode material, the chemical general formula of the lithium-ion battery ternary positive electrode material is LiNi 0.5 co 0.2 mn 0.3 Ga 0.015 f 0.045 o 2 The preparation method of this lithium-ion battery ternary cathode material is as follows:

[0055] (1) Weigh 1000 Li according to the ratio of lithium matching 1.08 2 CO 3 and 2285g commercially available ternary precursor (Ni 0.5 co 0.2 mn 0.3 )(OH) 2 , add 12.9g GaF 3 As a modified material, add deionized water at a solid-to-liquid ratio of 2:1, then add a certain amount of dispersant, and use a high-speed mixer to stir and mix for 1 hour to form a stable slurry;

[0056] (2) Spray drying the above slurry, the inlet temperature is 240°C, and the outlet temperature is 90°C;

[0057] (3) Put the dried powder in an atmosphere furnace at 500°C, keep it in a nitrogen atmosphere for 6 hours, pass it through a 200-mesh sieve after cooling, and...

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Abstract

The invention provides a ternary positive electrode material of a lithium ion battery and a preparation method and application thereof. The chemical general formula of the ternary positive electrode material of the lithium ion battery is LiNi1-x-yCoxMnyMaFbO2, wherein x is larger than 0.1 and smaller than 0.3, y is larger than 0.1 and smaller than 0.3, a is larger than 0.01 and smaller than 0.1, and b is larger than 0.01 and smaller than 0.05; and M is selected from one of Ga, Zn, Na and Al. The ternary positive electrode material of the lithium ion battery has excellent cycling stability andhigh-quality specific capacity, and the lithium ion battery prepared by applying the ternary positive electrode material to the lithium ion battery has the advantages of high capacity, good cycling stability and long service life.

Description

technical field [0001] The invention belongs to the technical field of lithium battery materials, and relates to a lithium-ion battery ternary positive electrode material and its preparation method and application; in particular, it relates to a preparation method and application of a lithium battery surface-coated and modified positive electrode material. Background technique [0002] To meet the requirements of large-scale energy storage and the rapid development of electric vehicles, key materials with high stability, high cycle performance, and high specific energy and their preparation technologies are important directions for battery development. At present, ternary cathode materials have attracted much attention because of their high specific energy. . In order to further improve the thermal stability and electrochemical performance of materials, it is usually necessary to modify them. [0003] Chinese invention patent CN104638227A discloses a method for modifying th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 万马彭文姚丹李亚金张峥
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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