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High-capacity high-nickel positive electrode material and preparation method thereof

A cathode material and high-capacity technology, which is applied in the field of high-capacity and high-nickel cathode materials and their preparation, can solve the problems of difficulty in meeting high-nickel cathode materials, many technological processes, and complicated operations, and is suitable for large-scale industrial production applications and processes. Simple, low-cost effects

Inactive Publication Date: 2020-12-01
TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Co-precipitation and sol-gel methods have the advantages of uniform particle size, regular shape, uniform element distribution, and low reaction temperature required for the prepared powder materials. There are many, the operation is more complicated, and it involves cleaning the reaction vessel equipment, etc., which is time-consuming and laborious, and it is difficult to meet the needs of large-scale industrial production of high-nickel cathode materials

Method used

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  • High-capacity high-nickel positive electrode material and preparation method thereof
  • High-capacity high-nickel positive electrode material and preparation method thereof
  • High-capacity high-nickel positive electrode material and preparation method thereof

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Embodiment approach

[0031] According to a preferred embodiment of the present invention, the high-nickel precursor is Ni x co y mn 1-x-y (OH) 2 , where, 0.8

[0032] In the present invention, the source of the high-nickel precursor is not particularly limited, and commercially available products well known to those skilled in the art are preferably used.

[0033] According to the present invention, the particle size of the high-nickel precursor is 1-10 μm, preferably 3-8 μm, more preferably 4-7 μm, such as 5 μm, and the positive electrode material obtained when the precursor particle size is too large is processed into the energy density of the battery Low; the cycle performance of the positive electrode material obtained by the precursor particle size is too small,

[0034] According to the present invention, the lithium-containing compound is selected from one or more of lithium-containing oxides, hydroxides, nitrates and carbonates, preferably LiOH, Li 2 CO 3 、LiNO 3 an...

Embodiment Embodiment 1

[0097] 500g high-nickel ternary precursor Ni 0.88 co 0.06 mn 0.06 (OH) 2 , 230.500g LiNO 3 , and 1.2540g of Al 2 o 3 , 0.4763g of TiO 2 The modified additives are mixed evenly;

[0098] The above mixture was sintered at 600°C for 15 hours in an oxygen atmosphere furnace. After cooling, the primary sintered material was obtained, which was pulverized, sieved with a 100-mesh screen, and then stirred and washed with deionized water. After suction filtration, it was placed in Dry in a vacuum oven at 250°C for 5 hours to obtain a high-nickel cathode material matrix;

[0099] 350g high-nickel cathode material matrix and 10.5g coating agent Co 3 o 4 well mixed;

[0100] The mixture of the high-nickel cathode material matrix and the coating agent was placed in an oxygen atmosphere furnace and sintered at 200° C. for 3 hours, and sieved with a 100-mesh sieve after cooling. A high-capacity high-nickel cathode material is obtained.

[0101] Gained high-capacity high-nickel po...

Embodiment 2

[0103] 500g high-nickel ternary precursor Ni 0.88 co 0.06 mn 0.06 (OH) 2 , 235.750gLiNO 3 , and 1.2540g of Al 2 o 3 , 0.4763g of TiO 2 The modified additives are mixed evenly;

[0104] The above mixture was sintered at 600°C for 15 hours in an oxygen atmosphere furnace. After cooling, the primary sintered material was obtained, which was pulverized, sieved with a 100-mesh screen, and then stirred and washed with deionized water. After suction filtration, it was placed in Dry in a vacuum oven at 250°C for 5 hours to obtain a high-nickel cathode material matrix;

[0105] 350g high-nickel cathode material matrix and 10.5g coating agent Co 3 o 4 well mixed;

[0106] The mixture of the high-nickel cathode material matrix and the coating agent was placed in an oxygen atmosphere furnace and sintered at 200° C. for 3 hours, and sieved with a 100-mesh sieve after cooling. A high-capacity high-nickel cathode material is obtained.

[0107] The obtained high-capacity high-nick...

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Abstract

The invention discloses a high-capacity high-nickel positive electrode material and a preparation method thereof. The high-capacity high-nickel positive electrode material is formed by a matrix and acoating layer, the matrix is prepared from a high-nickel precursor, a lithium-containing compound and an M-containing modified additive, and the high-nickel precursor is selected from one or more of nickel-cobalt-manganese oxide, hydroxide and carbonate. The coating layer is composed of a coating agent, the coating agent is a metal compound and / or a non-metal compound, and M is selected from one or more of metal elements and / or non-metal elements. The preparation method comprises the following steps: mixing a high-nickel precursor, a lithium-containing compound and an M-containing modified additive; carrying out primary sintering and post-treatment to obtain a high-nickel positive electrode material matrix; mixing the high-nickel positive electrode material matrix with a coating agent; andcarrying out secondary sintering and post-treatment to obtain the high-nickel positive electrode material. The high-capacity high-nickel positive electrode material is prepared by a primary doping and secondary coating method, is stable in lattice structure, and has the advantages of high specific capacity and good cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to lithium ion battery cathode materials, in particular to a high-capacity and high-nickel cathode material and a preparation method thereof. Background technique [0002] Due to the advantages of light weight, small size, high specific capacity and long cycle life, lithium-ion batteries are widely used in portable digital products, communication tools and electric vehicles. Lithium-ion battery cathode materials play a key role in lithium-ion batteries. The rapid development of lithium-ion batteries has put forward higher requirements for cathode materials. High-nickel cathode materials (Ni≥0.8) have the advantages of high theoretical specific capacity (about 280mAh / g) and low cobalt content, and have attracted widespread attention in recent years, and are expected to become the preferred cathode for a new generation of lithium-ion secondary batteries. However, the actu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/62H01M10/0525Y02E60/10
Inventor 杨俊张林石自伟赵俊俊沙金朱卫泉苏迎春
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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