Preparation method of modified high nickel ternary cathode material

A positive electrode material, high-nickel technology, applied in the field of preparation of modified high-nickel ternary positive electrode materials, can solve the problems of increased residual alkali content, increased pH value, high requirements, etc., to inhibit reaction, improve processing performance, and increase magnification performance effect

Inactive Publication Date: 2018-05-22
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For high nickel ternary material LiNi x co y m 1-x-y o 2 (X≥0.80), increasing the content of nickel has become the mainstream direction of ternary materials, but with the increase of nickel content, the residual alkali content on the surface of the material in the lithium-mixed sintering stage increases, and the pH value of the material increases, causing damage to the material High requirements for storage and application environment

Method used

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  • Preparation method of modified high nickel ternary cathode material
  • Preparation method of modified high nickel ternary cathode material
  • Preparation method of modified high nickel ternary cathode material

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Embodiment 1

[0033] A method for preparing a modified high-nickel ternary positive electrode material, comprising the steps of: mixing and reacting the washed high-nickel ternary positive electrode material with a metal salt solution, followed by drying and sintering to obtain the modified high-nickel ternary positive electrode material .

Embodiment 2

[0035] A method for preparing a modified high-nickel ternary positive electrode material, comprising the steps of: mixing 100 g of high-nickel ternary positive electrode material with deionized water, stirring, centrifuging, and drying in sequence to obtain a high-nickel ternary positive electrode material washed with water Positive electrode material: After mixing the washed high-nickel ternary positive electrode material with the metal salt solution, stirring continuously for 2 hours to obtain a slurry, drying and sintering the slurry in sequence to obtain a modified high-nickel ternary positive electrode material;

[0036] Wherein, the high-nickel ternary positive electrode material is LiNi 0.85 co 0.1 mn 0.05 o 2 ;

[0037] The drying equipment is a rotary evaporator;

[0038] The sintering is carried out in an atmosphere of pure oxygen;

[0039] The temperature of the sintering is 500°C, and the time is 8h;

[0040] The weight ratio of the high-nickel ternary positi...

Embodiment 3

[0050] A method for preparing a modified high-nickel ternary positive electrode material, comprising the steps of: mixing 100 g of high-nickel ternary positive electrode material with deionized water, stirring, centrifuging, and drying in sequence to obtain a high-nickel ternary positive electrode material washed with water Positive electrode material: After mixing the washed high-nickel ternary positive electrode material with the metal salt solution, stirring continuously for 2 hours to obtain a slurry, drying and sintering the slurry in sequence to obtain a modified high-nickel ternary positive electrode material;

[0051] Wherein, the high-nickel ternary positive electrode material is LiNi 0.8 co 0.1 mn 0.1 o 2 ;

[0052] The drying equipment is a rotary evaporator;

[0053] The sintering is carried out in an atmosphere of pure oxygen;

[0054] The temperature of the sintering is 600°C, and the time is 5h;

[0055] The weight ratio of the high-nickel ternary positive...

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Abstract

The invention discloses a preparation method of a modified high nickel ternary cathode material, which is prepared by the following steps: mixing a water washed high nickel ternary cathode material with a metal salt solution to carry out reactions, and then drying and sintering the reaction product. The provided modification method can reduce the free lithium on the surface of the high nickel ternary cathode material and pH value, and at the same time, the capacity and cycle performance of the high nickel ternary cathode material are improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of a modified high-nickel ternary positive electrode material. Background technique [0002] With the promotion of new energy vehicles, power lithium-ion batteries have been greatly developed. At the same time, new energy vehicles have high requirements for mileage, and there are also high requirements for energy density, high cycle performance and high safety performance of lithium-ion batteries. Require. At present, the main research direction is to increase the gram capacity of the material, and the high-nickel ternary material has become the focus of attention of the positive electrode material because of its high capacity. In order to achieve a battery with high energy density, it is necessary to use high-nickel materials with higher capacity to achieve it. [0003] For high nickel ternary material LiNi x co y m 1-x-y o 2 (X≥0.80), in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/5825H01M4/624H01M10/0525Y02E60/10
Inventor 陈方高玉仙李道聪
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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