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High-nickel quaternary precursor material as well as preparation method and preparation system thereof

A technology for preparing systems and precursors, applied in chemical instruments and methods, nickel compounds, electrical components, etc., can solve the problems affecting the specific capacity, cycleability, thermal stability, and low tap density of lithium batteries, and achieve particle crushing Or the possibility of hollowing is reduced, the heating rate is fast, and the effect of ensuring uniformity

Pending Publication Date: 2021-01-15
中科(马鞍山)新材料科创园有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the tap density of the existing high-nickel quaternary precursor material is low, which affects the specific capacity, cycleability and thermal stability of the lithium battery thus prepared. Therefore, it is necessary to improve the existing preparation process to prepare Obtain a high-nickel quaternary precursor material with high tap density

Method used

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  • High-nickel quaternary precursor material as well as preparation method and preparation system thereof
  • High-nickel quaternary precursor material as well as preparation method and preparation system thereof
  • High-nickel quaternary precursor material as well as preparation method and preparation system thereof

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Embodiment 1

[0069] This embodiment provides a Ni 0.88 co 0.05 mn 0.05 Zr 0.02 (OH) 2 The preparation method of the quaternary precursor material, the preparation method is carried out in the preparation system provided in the above specific embodiment, and the preparation method specifically includes the following steps:

[0070] (1) Weigh nickel sulfate, cobalt sulfate, manganese sulfate and zirconium sulfate respectively according to the molar ratio of nickel, cobalt, manganese and zirconium in the ratio of 88:5:5:2, add water and mix them to prepare a concentration of 2mol / L mixed salt solution;

[0071] (2) Send mixed salt solution, ammonia solution (concentration is 10.4mol / L) and sodium hydroxide solution (concentration is 8mol / L) into reaction device 1 through peristaltic pump, fully stir reaction under nitrogen atmosphere to obtain mixed slurry , the stirring speed is 500r / min;

[0072] (3) The mixed slurry enters the aging device 2 by overflowing, mixes with sodium dodecylb...

Embodiment 2

[0077] This embodiment provides a Ni 0.89 co 0.05 mn 0.05 Zr 0.01 (OH) 2 The preparation method of the quaternary precursor material, the preparation method is carried out in the preparation system provided in the above specific embodiment, and the preparation method specifically includes the following steps:

[0078] (1) Weigh nickel chloride, cobalt chloride, manganese chloride and zirconium oxychloride respectively according to the molar ratio of nickel, cobalt, manganese and zirconium as 89:5:5:1, add water and mix to make the concentration 2mol / L mixed salt solution;

[0079] (2) Mixed salt solution, ammonium carbonate solution (concentration is 10.8mol / L) and potassium hydroxide solution (concentration is 9mol / L) are sent in the reaction device 1 by peristaltic pump, fully stir reaction under nitrogen atmosphere to obtain mixed Slurry, stirring speed is 600r / min;

[0080] (3) The mixed slurry enters the aging device 2 by overflowing, mixes with sodium dodecylbenze...

Embodiment 3

[0084] This embodiment provides a Ni 0.90 co 0.05 mn 0.04 Zr 0.01 (OH) 2 The preparation method of the quaternary precursor material, the preparation method is carried out in the preparation system provided in the above specific embodiment, and the preparation method specifically includes the following steps:

[0085] (1) Weigh nickel nitrate, cobalt nitrate, manganese nitrate and zirconium nitrate respectively according to the molar ratio of nickel, cobalt, manganese and zirconium as 90:5:4:1, add water and mix to prepare a mixed salt with a concentration of 2mol / L solution;

[0086] (2) Mixed salt solution, ammonium bicarbonate solution (concentration is 9.5mol / L) and lithium hydroxide solution (concentration is 7mol / L) are sent in the reaction device 1 by peristaltic pump, fully stirred reaction under nitrogen atmosphere to obtain Mix the slurry, the stirring speed is 650r / min;

[0087] (3) The mixed slurry enters the aging device 2 by overflowing, mixes with sodium d...

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Abstract

The invention provides a high-nickel quaternary precursor material as well as a preparation method and a preparation system thereof. The preparation method comprises the steps of mixing and reacting amixed salt solution, a complexing agent and a precipitator to obtain mixed slurry, and mixing the mixed slurry with a surfactant and a defoaming agent to obtain a precursor solution; and carrying outspray granulation on the precursor solution to obtain the quaternary precursor material. By adding the surfactant and the defoaming agent into the mixed slurry, crystal nucleus particles can be further formed, the surfactant reduces the surface tension among the particles, and dense crystal form particles can be formed. Meanwhile, gas is mixed in the stirring process of the mixed slurry, and thedefoaming agent is beneficial to rapid discharge of the gas, so that the mixed slurry system is more uniform, and the uniformity of particle element components is ensured.

Description

technical field [0001] The invention belongs to the technical field of positive electrode precursor materials, and relates to a high-nickel quaternary precursor material, a preparation method and a preparation system thereof. Background technique [0002] At present, the power batteries assembled on the car can be divided into ternary lithium batteries and lithium iron phosphate batteries according to the types, and the energy density of the ternary lithium batteries is still limited, especially in terms of battery performance. Some are limited. Moreover, from the perspective of the positive electrode material of the battery, the price of cobalt in the ternary lithium battery is naturally higher, so for the battery, it will directly affect the cost of battery production, while for the lithium battery Technology research and development and production have also been put on the agenda. With the development and application of new energy quaternary lithium batteries, quaternary ...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/44H01M4/505H01M4/525H01M4/485H01M10/0525H01M2004/028C01P2004/03C01P2004/61C01P2004/32Y02E60/10
Inventor 冯建林冯海兰谭强强
Owner 中科(马鞍山)新材料科创园有限公司
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