Preparation method of high-voltage ternary composition material

A technology of composite materials and ternary materials, applied in the direction of electrical components, circuits, battery electrodes, etc., can solve the problems of poor coating effect, poor compatibility between materials and electrolyte, and achieve good cycle performance

Inactive Publication Date: 2018-08-10
SHANDONG FENGYUAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For example, the patent (CN106532029A) discloses a high-voltage ternary material for lithium-ion batteries and its preparation method. Its main gradient codeposition method synthesizes the precursor of the positive electrode material. The nickel element in the precursor presents a gradient distribution from the inside to the outside, and is mixed with It is mixed with magnesium, aluminum and other

Method used

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  • Preparation method of high-voltage ternary composition material
  • Preparation method of high-voltage ternary composition material
  • Preparation method of high-voltage ternary composition material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Precursor preparation:

[0031] Using a high-speed mixer to mix 85g Ni 0.6 co 0.2 mn 0.2 (OH) 2 Ternary material precursor powder, 15g of lithium carbonate, 3g of manganese sulfate and 3g of VOSO 4 Mix evenly through a three-dimensional mixer, then place it in a bell furnace, heat up to 750°C at a rate of 8°C / min in an air atmosphere, and keep it at 750°C for 6 hours, then continue to heat up to 900°C for 6 hours, and then heat it up with the furnace Cool down to room temperature, and obtain high-voltage nickel-cobalt-manganese-lithium material A after crushing and sieving;

[0032] 2), coating:

[0033] Weigh 100g of trimethylhexylbis(trifluoromethylsulfonyl)imide, then add 50ml of graphene solution with a concentration of 3%, stir evenly, then add 20g of urea and stir evenly to obtain coating solution B; then Weigh 100g of material A and add it to 800ml of coating solution B, mix evenly, and after stirring evenly, prepare a ternary composite material by spray...

Embodiment 2

[0035] 1.) Precursor preparation:

[0036] Using a high-speed mixer to mix 80gNi 0.6 co 0.2 mn 0.2 (OH) 2Ternary material precursor powder, 10g lithium hydroxide, 1g manganese chloride and 1g (VO 2 ) 2 SO 4 Mix evenly by a three-dimensional mixer, then place it in a bell furnace, raise the temperature to 700°C at a rate of 5°C / min in an air atmosphere, and keep it at 700°C for 12 hours, then continue to heat it up to 850°C for 12 hours at a constant temperature, and then heat it up with the furnace Cool down to room temperature, and obtain high-voltage nickel-cobalt-manganese-lithium material A after crushing and sieving;

[0037] 2), coating:

[0038] Weigh 100g of N-methyl-N-propylpiperidine bis(trifluoromethylsulfonyl)imide (PP13TFSI), then add 20ml, the concentration is 5% graphene solution, after stirring evenly, add 10g Stir the urea evenly to obtain coating solution B; then weigh 100 parts of material A and add it to 500ml of coating solution B and mix evenly. ...

Embodiment 3

[0040] 1) Precursor preparation:

[0041] Using a high-speed mixer to mix 90gNi 0.6 co 0.2 mn 0.2 (OH) 2 Ternary material precursor powder, 20g of lithium carbonate powder, 5g of manganese nitrate and 5g of VCl 3 Mix evenly by a three-dimensional mixer, then place it in a bell furnace, raise the temperature to 800°C at a rate of 10°C / min in an air atmosphere, and keep it at 800°C for 2 hours, then continue to heat it up to 950°C for 2 hours, and then heat it up with the furnace Cool down to room temperature, and obtain high-voltage nickel-cobalt-manganese-lithium material A after crushing and sieving;

[0042] 2), coating:

[0043] Weigh 100g of trimethylhexylbis(trifluoromethylsulfonyl)imide, then add 100ml of graphene solution with a concentration of 1%, stir evenly, then add 30g of urea and stir evenly to obtain coating solution B; After that, 100 parts of material A were weighed and added to 1000 ml of coating liquid B, mixed evenly, and after stirring evenly, a tern...

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Abstract

The invention belongs to the field of lithium ion battery material preparation, and particularly relates to a preparation method of a high-voltage ternary composition material. The preparation methodcomprises the steps of adding a ternary material precursor, a lithium salt, a vanadium salt and a manganese salt into a three-dimensional mixing machine, and performing uniform stirring and sinteringto obtain a material A; and adding the material A into urea and a graphene ion liquid mixed solution thereof, performing heating and heat preservation after uniform stirring, and performing spray drying to prepare the ternary composition material. A surface of the Ni-Co-Mn ternary positive electrode material is coated with the vanadium salt and the manganese salt, the voltage platform is improved,meanwhile, the conductivity of the material is improved by conductivity of graphene, the coating quality is improved by a special effect in the urea, a layer of uniform coating film is formed, and the cycle property and the rate performance of the material under a high-voltage condition are improved.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery materials, in particular to a preparation method of a high-voltage ternary composite material. Background technique [0002] As the market's requirements for the energy density of lithium-ion batteries increase, lithium-ion batteries are required to increase the energy density without affecting the cycle performance, rate performance and processing performance of the battery. At present, the main methods to improve the energy density of lithium-ion batteries on the market are: 1) Using high-voltage ternary materials and their high-voltage electrolytes; 2) Using high-density ternary materials; 3) Using high-capacity ternary materials 4) Optimizing battery design, such as increasing the areal density of materials and their utilization. The use of high-voltage ternary materials in method (1) is a method with low cost, simple process and easy industrialization. [0003] For example,...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M4/625H01M10/0525Y02E60/10
Inventor 李桂臣朱涛
Owner SHANDONG FENGYUAN CHEM CO LTD
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