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A kind of reaction kettle and method for preparing lithium-ion battery cathode material precursor

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of reactors for the preparation of lithium-ion battery positive electrode material precursors, and can solve the problems of uncontrollable particle size distribution, high investment costs, and wide particle size distribution of ternary positive electrode material precursors.

Active Publication Date: 2021-02-26
河南科隆电源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only occupies a large area, high investment cost, and cumbersome process, but also the prepared ternary cathode material precursor has a wide particle size distribution, and the finished product contains fine powder and large particles, and the particle size distribution is uncontrollable
When the ternary positive electrode material precursor with uncontrollable particle size is sintered, the excessively large particles of lithium ions are not easy to penetrate, resulting in poor electrical properties of the prepared lithium ion positive electrode material; while the tap density of the fine powder is low, which affects lithium ion. The capacity of the battery, and the safety performance of overburned micropowder is also poor

Method used

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  • A kind of reaction kettle and method for preparing lithium-ion battery cathode material precursor
  • A kind of reaction kettle and method for preparing lithium-ion battery cathode material precursor
  • A kind of reaction kettle and method for preparing lithium-ion battery cathode material precursor

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Embodiment 1

[0042] Preparation of a lithium-ion battery cathode material precursor Ni 0.90 co 0.05 Al 0.05 (OH) 2 .

[0043] figure 1 Shown is the reaction kettle used in this embodiment to prepare the precursor of the positive electrode material of the lithium ion battery, including: the housing 1, the stirring device 2, the first air inlet pipe 41, the air outlet pipe 5 and the feed pipe 6, the feed pipe The pipes 6 are three mutually independent pipes, and the feed pipe 6 leads into the bottom of the housing 1 . The housing 1 is also provided with a first filter plate 31, which is made of PE material and has a filter hole diameter of 0.5 μm. The first filter plate 31 is horizontally sealed and fixed in the housing 1, and the first filter plate 31 divides the interior of the housing 1 into a lower reaction zone 12 and an upper first classification zone 13; The stirring blade 21 of the stirring device 2 is arranged on the reaction zone 12; the first air inlet pipe 41 leads into the...

Embodiment 2

[0048] figure 2 Shown is the reaction kettle used in this embodiment to prepare the precursor of the positive electrode material of the lithium ion battery, including: the housing 1, the stirring device 2, the first air inlet pipe 41, the air outlet pipe 5 and the feed pipe 6, the feed pipe The pipes 6 are three mutually independent pipes, and the feed pipe 6 leads into the bottom of the housing 1 . The center of the bottom surface 11 of the housing cavity of the housing 1 protrudes. A first filter plate 31 and a second filter plate 32 are horizontally sealed and fixed in the housing 1 from bottom to top; the filter hole diameter of the first filter plate 31 is 1.0 μm, and the material is PE; the second filter plate 31 The pore diameter of the filter plate 32 is 0.5 μm, and the material is PP. A reaction zone 12 is formed between the first filter plate 31 and the bottom surface 11 of the housing cavity, a first classification zone 13 is formed between the first filter plate...

Embodiment 3

[0056] image 3 Shown is the reaction kettle used in this embodiment to prepare the precursor of the positive electrode material of the lithium ion battery, including: the housing 1, the stirring device 2, the first air inlet pipe 41, the air outlet pipe 5 and the feed pipe 6, the feed pipe The tubes 6 are three mutually independent tubes, the feed tube 6 leads into the bottom of the housing 1 , and the center of the bottom surface 11 of the housing cavity of the housing 1 protrudes. The first filter plate 31, the second filter plate 32 and the clear liquid filter plate 33 are sealed and fixed in sequence from bottom to top in the housing 1; the filter hole diameter of the first filter plate 31 is 2.0 μm, and the material is ceramics; the filter hole diameter of the second filter plate 32 is 1.5 μm, and the material is PP; the filter hole diameter of the clear liquid filter plate 33 is 0.5 μm, and the material is PE. A reaction zone 12 is formed between the first filter plate...

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Abstract

The invention discloses a reaction kettle for preparing a precursor of a positive electrode material of a lithium ion battery, comprising a shell, a stirring device, a first air inlet pipe, an air outlet pipe, a feed pipe and a filter plate, the feed pipe leads to the bottom of the shell, and the filter plate The plate divides the shell into a reaction zone and a classification zone; the stirring blade is in the reaction zone; the first air inlet pipe leads into the reaction zone, and the outlet pipe opening is set on the top of the shell; there is a bottom discharge pipe at the bottom of the reaction zone; There is a side wall discharge pipe. The invention also discloses a method for preparing the precursor of the positive electrode material of the lithium ion battery by the reaction kettle: the raw material is passed into the reaction zone under stirring; nitrogen gas of 0.02-0.15 MPa is passed through the first air inlet pipe to press part of the small particles of the precursor into the Grading area. In the reactor and the preparation method of the present invention, the precursor with the required particle size is separated during the reaction and continues to grow. Precursors with different particle sizes are prepared from filter plates with different pore sizes, and then mixed in proportion, so that the particle size and particle size distribution of the lithium-ion battery cathode material precursor can be controlled.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a reaction kettle and a method for preparing a lithium ion battery cathode material precursor. Background technique [0002] With the continuous expansion of the application field of lithium-ion batteries, the cathode materials of lithium-ion batteries have also been developed rapidly. The nickel-cobalt-lithium-manganese-oxide ternary cathode material for lithium-ion batteries has great advantages in terms of cycle performance, safety, stability, and energy density, and is widely used in electric vehicles. The performance of the body determines the electrical performance of the lithium-ion battery to a large extent, so the performance of the precursor of the lithium-ion battery ternary cathode material has also attracted much attention. [0003] In the prior art, the synthesis reaction of the precursor of the lithium-ion battery ternary cathode material mostly ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/18B01J19/00B01D29/56H01M4/505H01M4/525H01M10/0525
CPCB01D29/56B01J19/0053B01J19/18H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 王明彩徐云军汪文陈丹凤高远方李国华
Owner 河南科隆电源材料有限公司