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Method for preparing high-nickel ternary cathode material of lithium ion battery

A high-nickel ternary material and lithium-ion battery technology, applied in battery electrodes, electrical components, secondary batteries, etc., can solve problems such as difficult equipment implementation, and achieve the effects of reducing production costs, easy industrialization, and easy raw materials

Active Publication Date: 2014-12-10
北京盟固利新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the above-mentioned methods all require an atmosphere with an oxygen content of more than 90%, and this preparation atmosphere not only needs to feed high-purity oxygen into the reaction system, but also has strict requirements on the airtightness of the reaction equipment. Realize this preparation condition, but it is difficult to realize in industrial production due to equipment reasons

Method used

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  • Method for preparing high-nickel ternary cathode material of lithium ion battery
  • Method for preparing high-nickel ternary cathode material of lithium ion battery
  • Method for preparing high-nickel ternary cathode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Lithium hydroxide and nickel cobalt manganese hydroxide Ni 0.8 co 0.1 mn 0.1 (OH) 2 mixed, where Ni 0.8 co 0.1 mn 0.1 (OH) 2 The mass of is 100g, and the precursor mixture is prepared,

[0064] (2) Add 5 g of potassium permanganate to the precursor mixture, ball mill, and roast in an oxygen atmosphere at a temperature of 780 ° C for 20 h to obtain a nickel-cobalt-manganese lithium-oxygen compound,

[0065] (3) After the nickel-cobalt-manganese lithium oxygen compound is cooled, it is pulverized, and the product LiNi is obtained through a 300-mesh sieve. 0.8 co 0.1 mn 0.1 o 2 , its sulfate content is 2800ppm, and the D50 of particle size is 10.6μm.

[0066] Using the obtained material as the positive electrode and the lithium sheet as the negative electrode, assemble it into a button battery, and charge and discharge it in the voltage range of 3.0-4.3V. The first reversible discharge specific capacity of the material is measured to be 172.3mAh / g, 50 times ...

Embodiment 2

[0068] (1) Lithium hydroxide and nickel cobalt manganese hydroxide Ni 0.8 co 0.15 al 0.05 (OH) 2 mixed, where Ni 0.8 co 0.15 al 0.05 (OH) 2 The mass of is 200g, and the precursor mixture is prepared,

[0069] (2) Add 10 g of ammonium nitrate to the precursor mixture, ball mill, and roast at a temperature of 800 ° C for 20 h in an oxygen atmosphere to obtain a nickel-cobalt-aluminum-lithium-oxygen compound,

[0070] (3) pulverize after cooling, and get the product LiNi through a 300-mesh sieve 0.8 co 0.15 al 0.05 o 2 , and its sulfate content is 2660ppm.

[0071] Using the obtained material as the positive electrode and the lithium sheet as the negative electrode, assemble it into a button battery, and charge and discharge it in the voltage range of 3.0-4.3V. The first reversible discharge specific capacity of the material is measured to be 173.3mAh / g, 50 times The cycle retention rate is 97.1%, and its cycle curve is as follows image 3 shown.

Embodiment 3

[0073] (1) Lithium hydroxide and nickel cobalt manganese hydroxide Ni 0.7 co 0.15 mn 0.15 (OH) 2 mixed, where Ni 0.7 co 0.15 mn 0.15 (OH) 2 The mass of is 200g, and the precursor mixture is prepared,

[0074] (2) Add 2 g of sodium nitrate to the precursor mixture, ball mill, and roast in an oxygen atmosphere at a temperature of 850 ° C for 20 hours to obtain a nickel-cobalt-manganese lithium-oxygen compound,

[0075] (3) pulverize after cooling, and get the product LiNi through a 300-mesh sieve 0.7 co 0.15 mn 0.15 o 2 , and its sulfate content is 3180ppm.

[0076] Using the obtained material as the positive electrode and the lithium sheet as the negative electrode, assemble it into a button battery, and charge and discharge it in the voltage range of 3.0-4.3V. The first reversible discharge specific capacity of the material is measured to be 166.4mAh / g, 50 times The cycle retention rate is 98.7%, and its cycle curve is as follows Figure 4 shown.

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Abstract

The invention discloses a method for preparing a high-nickel ternary cathode material of a lithium ion battery. According to the method, under the existence, a lithium source and a nickel-cobalt-manganese hydroxide / a nickel-cobalt-aluminum hydroxide are used as reaction substrates and are calcined in an oxygen atmosphere to prepare the high-nickel ternary cathode material of the lithium ion battery. According to the method, the dependency on high-concentration oxygen in a preparation process can be reduced; by the use of low-concentration oxygen, the oxygen cost can be lowered, and a requirement on the sealing property of calcining equipment is also reduced, so that the cost is lowered; meanwhile, compared with the high-nickel ternary cathode material of the lithium ion battery, which is prepared by the common method, the high-nickel ternary cathode material of the lithium ion battery, which is prepared by the method disclosed by the invention, is higher in circulating performance and higher in specific capacity.

Description

technical field [0001] The invention relates to the field of preparation of lithium-ion cathode materials, in particular to a method for preparing high-nickel ternary cathode materials for lithium-ion batteries. Background technique [0002] Since Sony commercialized lithium-ion batteries in 1991, lithium-ion batteries have played an increasingly important role in people's lives, and now they are widely used in electronic products such as computers, cameras, mobile phones, and power vehicles. At present, cathode materials mainly include LiCoO with a layered structure 2 , LiNiO 2 , LiMnO 2 , LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , LiNi 0.5 co 0.2 mn 0.3 o 2 , LiNi 0.8 co 0.2 o 2 , LiMn with spinel structure 2 o 4 , LiNi 0.5 mn 1.5 o 4 , LiFePO with olivine structure 4 Wait. As the market's requirements for energy density continue to increase, the development of lithium-ion batteries with high capacity has become a top priority. [0003] Lithium cobalt oxide cathode ...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/1395
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 崔妍郝振佳江卫军文博李化一张溪苏迎春
Owner 北京盟固利新材料科技有限公司
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