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Reactor for preparing ternary precursor

A technology of reaction kettle and kettle body is applied in the field of reaction kettles for preparing ternary precursors, which can solve the problems of poor compressive strength, the need for further research on ternary precursors, and high tap density.

Active Publication Date: 2022-04-26
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Currently used to prepare ternary precursors (ternary precursors are the precursor materials used to prepare lithium-ion battery cathode materials), the feed pipes are all fed by straight pipes with thicker diameters. Smooth and continuous feeding of materials, but this will lead to weak dispersibility of materials, resulting in poor sphericity, abnormal nucleation, poor compressive strength and high tap density of the prepared small particle ternary precursor. Inhomogeneous distribution of elements also exists in the particle
[0003] Therefore, the research on the preparation of ternary precursors needs to be in-depth

Method used

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  • Reactor for preparing ternary precursor
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  • Reactor for preparing ternary precursor

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Using 2mol / L nickel sulfate hexahydrate, cobalt sulfate heptahydrate, and manganese sulfate monohydrate mixed sulfate solution, using 10mol / L NaOH as precipitant, using 13mol / L ammonia water as complexing agent, three raw materials are pumped at the same time Into the reaction kettle for reaction, control the pH at 11.5, M ions and NH in the raw materials 4 + The mol ratio is 0.5, in the reactor (structural schematic diagram as Figure 1~5 Shown), the reaction is carried out under the above conditions during the reaction process, the primary particles are first precipitated, and the morphology of the primary particle stack is as follows Figure 6 As shown, the primary particles then agglomerate into spherical secondary particles, as shown in the scanning electron microscope Figure 7 As shown, the final secondary particle high nickel ternary Ni 0.8 co 0.1 mn 0.1 (OH) 2 Precursor. Wherein, there are 2 sulfate feeding pipes in the reaction kettle, and a flat fan-sh...

Embodiment 2

[0046] Using 2mol / L nickel sulfate hexahydrate, cobalt sulfate heptahydrate, and manganese sulfate monohydrate mixed sulfate solution, using 10mol / L NaOH as precipitant, using 13mol / L ammonia water as complexing agent, three raw materials are pumped at the same time into the reactor for reaction, control the pH at 11.0, M ions and NH 4 + The mol ratio is 0.5, in the reactor (structural schematic diagram as Figure 1~5 Shown), the reaction is carried out in the reaction process, under the above conditions, the primary particles are first precipitated, and then the primary particles are agglomerated into spherical secondary particles, and finally the secondary particle high-nickel ternary precursor Ni is obtained. 0.6 co 0.2 mn 0.2 (OH) 2 Precursor. Wherein, there are 2 sulfate feeding pipes in the reaction kettle, and a flat fan-shaped atomizing nozzle is installed at the outlet of the feeding pipe, and the axial distance between the atomizing nozzle 50 and the stirring bl...

Embodiment 3

[0049] Using 2mol / L mixed sulfate solution of nickel sulfate hexahydrate, cobalt sulfate heptahydrate and aluminum sulfate octadecahydrate, using 10mol / L NaOH as precipitant, using 13mol / L ammonia water as complexing agent, the three raw materials are simultaneously Pump into the reactor for reaction, control the pH at 11.5, M and NH 4 + The mol ratio is 0.5, in the reactor (structural schematic diagram as Figure 1~5Shown), the reaction is carried out in the reaction process, under the above conditions, the primary particles are first precipitated, and then the primary particles are agglomerated into spherical secondary particles, and finally the secondary particle high-nickel ternary precursor Ni is obtained. 0.8 co 0.15 Al 0..05 (OH) 2 Precursor. Wherein, there are 2 sulfate feeding pipes in the reaction kettle, and a flat fan-shaped atomizing nozzle is installed at the outlet of the feeding pipe, and the axial distance between the atomizing nozzle 50 and the stirring ...

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Abstract

The invention provides a reaction kettle for preparing a ternary precursor. The reaction kettle includes: a kettle body; a stirring mechanism, the stirring mechanism includes a stirring rod and stirring blades evenly distributed along the stirring rod, the stirring blade is located inside the kettle body, a part of the stirring rod is located inside the kettle body, and the other part is distributed in the kettle body The exterior; multiple baffles, multiple baffles are evenly distributed on the inner wall of the kettle body; multiple feed pipes, multiple feed pipes have feed inlets and outlets, and the feed inlets are located on the inner wall of the kettle body Externally, the discharge port is located inside the kettle body, and the discharge port is located below the stirring blade in the axial direction of the kettle body, and the discharge port is installed with an atomizing nozzle. Therefore, the particle sphericity and compressive strength of the ternary precursor prepared by the above reactor are better, and the primary particle stacking method of the ternary precursor can be optimized, the specific surface area of ​​the particles can be increased, and the tap density of the ternary precursor can be improved. Between 1.8 and 2.3.

Description

technical field [0001] The present invention relates to the technical field of reactors, in particular to reactors for preparing ternary precursors. Background technique [0002] Currently used to prepare ternary precursors (ternary precursors are the precursor materials used to prepare lithium-ion battery cathode materials), the feed pipes are all fed by straight pipes with thicker diameters. Smooth and continuous feeding of materials, but this will lead to weak dispersibility of materials, resulting in poor sphericity, abnormal nucleation, poor compressive strength and high tap density of the prepared small particle ternary precursor. Inhomogeneous distribution of elements also exists in the particle [0003] Therefore, the research on the preparation of ternary precursors needs to be further studied. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an objec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J4/00B01J19/18
CPCB01J4/002B01J19/0066B01J19/18
Inventor 胡骐朱佳兵刘俊文陈祥斌胡文理陈璐
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD