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A kind of nickel-cobalt-manganese ternary precursor with xrd diffraction bifurcated double peaks and preparation method thereof

A nickel-cobalt-manganese ternary and precursor technology, applied in chemical instruments and methods, nickel compounds, electrical components, etc., to improve surface activity, reduce irreversible reactions, and suppress gas production

Active Publication Date: 2022-04-19
JINCHI ENERGY MATERIALS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diffraction peak at the diffraction angle 2θ=65±1° splits, indicating that the crystallinity of the positive electrode material is good, but the above-mentioned patent studies the positive electrode material after high-temperature sintering, not the precursor

Method used

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  • A kind of nickel-cobalt-manganese ternary precursor with xrd diffraction bifurcated double peaks and preparation method thereof
  • A kind of nickel-cobalt-manganese ternary precursor with xrd diffraction bifurcated double peaks and preparation method thereof
  • A kind of nickel-cobalt-manganese ternary precursor with xrd diffraction bifurcated double peaks and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Pre-prepared a mixed sulfate solution with a total metal ion concentration of nickel, cobalt, and manganese of 2.4mol / L, wherein Ni:Co:Mn=5:2:3 (molar ratio), take 100g of dodecyl ammonium sulfate and add it to 54L3mol / L L was fully dissolved in concentrated ammonia water and marked as A solution. Add pure water into the reaction kettle, the volume of pure water is 1 / 3 of the reaction kettle, start heating and stirring, the temperature is 55°C, the initial linear velocity of stirring is 6.5m / s, mix the sulfate solution, 10mol / L concentrated Alkali and liquid A are continuously pumped into the synthesis tank for co-precipitation reaction. During the reaction, the pH value of the reaction system is kept at 12, the alkalinity is 6g / L, the temperature is 55°C, and the stirring line speed is 6.5m / s. Stop the reaction when the median particle size of the reaction slurry grows to 16.5 μm, filter the reaction slurry, age the obtained solid phase with 10wt% dilute alkali for 30 ...

Embodiment 2

[0039] Prepare in advance a mixed sulfate solution with a total metal ion concentration of nickel, cobalt, and manganese of 2.0 mol / L, where Ni:Co:Mn=6:2:2 (molar ratio). Take 150g of triethanolamine lauryl sulfate and add it to 54L of 5mol / L concentrated ammonia water to fully dissolve it, and mark it as liquid A. Add pure water into the reaction kettle, the volume of pure water is 1 / 3 of the reaction kettle, turn on heating and stirring, adjust the temperature to 50°C, and stir at an initial linear velocity of 6.5m / s, mix sulfate solution, 8mol / L concentrated Alkali and liquid A are continuously pumped into the synthesis tank for reaction. During the reaction, the pH value of the reaction system is controlled to be 11, the alkalinity is 10g / L, the reaction temperature is 50°C, and the stirring line speed is 6.5m / s. The median particle size of the slurry grows to 17.5 μm to stop the reaction, filter the reaction slurry, and age the obtained solid phase with 10wt% dilute alkal...

Embodiment 3

[0041] Prepare in advance a mixed sulfate solution with a total metal ion concentration of nickel, cobalt, and manganese of 2.0 mol / L, where Ni:Co:Mn=9:0.2:0.8 (molar ratio). Add pure water into the reaction kettle, the volume of pure water is 1 / 3 of the volume of the reaction kettle, turn on heating and stirring, adjust the temperature to 65°C, and the rotation speed of the stirring paddle to 4.5m / s. Take 150g ammonium lauryl sulfate and add it to the reaction kettle, then pump the mixed sulfate solution, 5mol / L concentrated alkali solution, and 2.5mol / L ammonia solution into the synthesis tank continuously and concurrently for reaction, and control the reaction during the reaction The pH value of the system is 10, the alkalinity is 15g / L, the reaction temperature is 65°C, and the stirring line speed is 6.5m / s. Stop the reaction when the median particle size of the reaction slurry grows to 17.5μm, and filter the reaction slurry , the obtained solid phase was aged with 10wt% d...

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Abstract

The invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a nickel-cobalt-manganese ternary precursor with bifurcated XRD diffraction peaks and a preparation method thereof. In the powder X-ray diffraction measurement of the precursor described in the present invention, the peak shapes of 2θ at 32.5±1°, 38.5±1°, 52.5±1.5° and 58.5±2° are double peaks. In the present invention, additives are added in the process of co-precipitation to prepare the precursor, and the surface activity of metal ions is improved by utilizing the excellent compatibility performance of the additives.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a nickel-cobalt-manganese ternary precursor with bifurcated XRD diffraction peaks and a preparation method thereof. Background technique [0002] Nickel-cobalt-manganese hydroxide is generally prepared by co-precipitation method, using nickel salt, cobalt salt, manganese salt, hydroxide, and ammonia water to form spherical nickel-cobalt-manganese hydroxide under a certain reaction system. With the increase of nickel content, after the nickel-cobalt-manganese hydroxide synthesized by the traditional method is baked into the positive electrode material, it is prone to poor crystallinity, high internal stress, increased charge-discharge irreversible reactions, and poor cycle performance when used in batteries. , poor stability and a series of shortcomings. [0003] The Chinese patent with the notification number CN111509214B discloses the following...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/006H01M4/505H01M4/525H01M10/0525H01M2004/028H01M2004/021C01P2006/12C01P2006/11C01P2004/03C01P2002/72C01P2004/61Y02E60/10
Inventor 苏帅胡志兵刘庭杰张海艳胡海诗熊海龙吴泽盈侯鑫宇周春仙乔凡
Owner JINCHI ENERGY MATERIALS CO LTD
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