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Preparation method and application of lithium ion battery ternary positive electrode material

A technology for lithium ion batteries and positive electrode materials, which is applied to battery electrodes, positive electrodes, electrical components, etc., can solve the problems of unsatisfactory product uniformity, increased production cost, narrow distribution range, etc., and achieves low production cost and small particle size. , the effect of uniform particle distribution

Inactive Publication Date: 2019-07-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The particle size of the product obtained by the co-precipitation method is small and the distribution range is narrow, but the product has relatively high requirements on conditions such as precipitation temperature, solution concentration, pH, stirring intensity, and sintering temperature. Uniformity is not ideal
In addition, subsequent waste liquid treatment steps will also increase production costs

Method used

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  • Preparation method and application of lithium ion battery ternary positive electrode material
  • Preparation method and application of lithium ion battery ternary positive electrode material
  • Preparation method and application of lithium ion battery ternary positive electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of Ni by direct current electrochemical method 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 Precursors and LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Ternary cathode material

[0038] The nickel-manganese-cobalt alloy (111) / nickel-manganese-cobalt alloy as the working electrode was immersed in 300mL 2mol / L potassium nitrate electrolyte solution. The DC voltage was then set to 10V for electrolysis. After the electrolysis, the electrolyzed product was centrifuged, washed five times with distilled water and ethanol, and dried at 60°C for collection. Grind and mix the dried electrolysis product and lithium carbonate uniformly at a molar ratio of 1.2, place it in a tube furnace, and calcinate it in air at 800°C for 12h with a heating rate of 10°C / min, and collect it after cooling for later use.

[0039] (2) LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Application of Cathode Materials in Li-ion Batteries

[0040] Will LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The powder is mixed with activated carbon and polyv...

Embodiment 2

[0043] (1) Preparation of Ni by direct current electrochemical method 0.6 co 0.2 mn 0.2 (OH) 2 Precursors and LiNi 0.6 co 0.2 mn 0.2 o 2 Ternary cathode material

[0044] The nickel-manganese-cobalt alloy (622) / platinum as the working electrode was immersed in 300mL of 0.5mol / L sodium sulfate electrolyte solution. The DC voltage was then set to 8V for electrolysis. After the electrolysis, the electrolyzed product was centrifuged, washed five times with distilled water and ethanol, and dried at 80°C for collection. Grind and mix the dried electrolysis product and lithium hydroxide uniformly at a molar ratio of 0.8, place it in a tube furnace, and calcinate it in air at 850°C for 16 hours with a heating rate of 5°C / min, and collect it after cooling for later use.

[0045] (2) LiNi 0.6 co 0.2 mn 0.2 o 2 Application of Cathode Materials in Li-ion Batteries

[0046] Will LiNi 0.6 co 0.2 mn 0.2 o 2 The powder is mixed with activated carbon and polyvinylidene fluori...

Embodiment 3

[0049] (1) Preparation of Ni by direct current electrochemical method 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 Precursors and LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Ternary cathode material

[0050] The nickel-manganese-cobalt alloy (111) / nickel as the working electrode was immersed in 500mL of 1mol / L sodium chloride electrolyte solution. The DC voltage was then set to 15V for electrolysis. After the electrolysis, the electrolyzed product was centrifuged, washed five times with distilled water and ethanol, and dried at 80°C for collection. Grind and mix the dried electrolysis product and lithium carbonate uniformly at a molar ratio of 1.05, place it in a tube furnace, and calcinate it in air at 900°C for 18h with a heating rate of 4°C / min, collect it after cooling for later use.

[0051] (2) LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Application of Cathode Materials in Li-ion Batteries

[0052] Will LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The powder is mixed with activated carbon and polyvinylidene fluoride binder ...

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Abstract

The invention discloses a method for preparing a lithium ion battery ternary positive electrode material. The method comprises steps of electrolyzing, by a DC device, a nickel manganese cobalt alloy working electrode placed in a soluble inorganic salt electrolyte solution; centrifuging, washing and drying an electrolytic product to obtain a ternary positive electrode material precursor Ni1-x-yCoxMny(OH)2; and mixing the ternary positive electrode material precursor with a lithium source, grinding and calcining the mixture to obtain a LiNi1-x-yCoxMnyO2 ternary positive electrode material, wherein x=0.1 to 0.4, y=0.1 to 0.4. The method is easy to operate, high in yield, and low in production cost, generates no substance toxic to the human body and polluting the environment during a preparation process, and the electrolyte can be repeatedly used, and has obvious advantages in environmental protection and resource conservation.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials, and in particular relates to a preparation method and application of a lithium-ion battery ternary cathode material. Background technique [0002] As a secondary battery, lithium-ion batteries have the advantages of high specific energy, good cycle performance and low pollution, and are widely used in various energy storage devices. Since the positive electrode material is recognized as the most critical material in lithium-ion batteries, its performance will directly affect the energy storage density, cycle life, safety and other performance of the battery, so its development is also the most worthy of attention. At present, the anode materials for lithium-ion batteries that have been industrialized mainly include lithium cobalt oxide, modified lithium manganese oxide, ternary materials, and lithium iron phosphate. Among them, nickel-cobalt-manganese ternary materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/364H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 纪效波帅洪磊刘会群侯红帅
Owner CENT SOUTH UNIV
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