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Thick hopper control system and method for synthesizing ternary precursor by utilizing same

A technology for control systems and precursors, applied in chemical instruments and methods, control/regulation processes, chemical/physical/physical-chemical stationary reactors, etc., can solve the hidden dangers of high-pressure environment safety, high cost of concentrators, and high maintenance costs and other problems, to achieve the effects of excellent physical and chemical indicators, improved crystallinity, and increased number of seeds

Pending Publication Date: 2018-11-13
HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mainstream way of extracting solids is to use concentrator, which has the disadvantages of high cost, high cost of daily operation and maintenance, and large space occupation; at the same time, the concentrator uses high-purity nitrogen as power, and the clear liquid is discharged through the filter rod, causing blockage risk, the internal high-pressure environment also has potential safety hazards

Method used

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  • Thick hopper control system and method for synthesizing ternary precursor by utilizing same
  • Thick hopper control system and method for synthesizing ternary precursor by utilizing same
  • Thick hopper control system and method for synthesizing ternary precursor by utilizing same

Examples

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Embodiment 1

[0028] Such as figure 1 A thickening hopper control system shown includes a thickening hopper 1, a feed pipeline 2, a thick slurry return pipeline 3, a slurry return pipeline 4, and a clearing pipeline 5; one end of the feed pipeline is arranged at the bottom of the reactor, The other end leads to the upper part of the thickening hopper; one end of the slurry return pipeline is set on the upper part of the thickening hopper, and the other end leads to the upper part of the reactor; one end of the thick slurry return pipeline is set at the bottom of the thickening hopper, and the other end leads to the upper part of the reactor and is connected with the slurry The lower end of the material return pipeline is connected; one end of the clearing pipeline is set on the upper part of the thickening bucket; on the thickening slurry return pipeline, a diaphragm valve 6, an expansion joint 7, a vibrator 8, and an expansion joint 2 are arranged in sequence from the place close to the thi...

Embodiment 2

[0030]A method for synthesizing a ternary precursor using a thick bucket control system, comprising the following steps:

[0031] (1) On-site installation of the dense bucket control system as described in embodiment 1, including various pipelines and fittings;

[0032] (2) configuration metal ion concentration is the nickel cobalt manganese salt solution of 2.0mol / L, configuration sodium hydroxide solution concentration 200g / L, configuration ammonia concentration 9.5%; Add sodium hydroxide solution, ammonia liquor in reaction kettle bottom liquid, adjust The ammonia concentration is 3.5-5.5g / L, and the pH value is 10.0-12.0; the nickel-cobalt-manganese salt solution, sodium hydroxide solution, and ammonia water are added to the reactor at the same time, the reaction temperature is 50-70°C, the speed is controlled at 100-300rpm, and Maintain the pH value of 10.0-12.0, ammonia concentration 3.5-5.5g / L; and continuously feed nitrogen or argon gas to protect the slurry in the rea...

Embodiment 3

[0039] A method for synthesizing a ternary precursor using a thick bucket control system, comprising the following steps:

[0040] (1) On-site installation of the dense bucket control system as described in embodiment 1, including various pipelines and fittings;

[0041] (2) configuration metal ion concentration is the nickel cobalt manganese salt solution of 2.0mol / L, configuration sodium hydroxide solution concentration 200g / L, configuration ammonia concentration 9.5%; Add sodium hydroxide solution, ammonia liquor in reaction kettle bottom liquid, adjust The ammonia concentration is 8.5-9.5g / L, and the pH value is 10.0-12.0; the nickel-cobalt-manganese salt solution, sodium hydroxide solution, and ammonia water are added to the reactor at the same time, the reaction temperature is 50-70°C, the speed is controlled at 100-300rpm, and Maintain the pH value of 10.0-12.0, ammonia concentration of 8.5-9.5g / L; and continuously feed nitrogen or argon and other gases to protect the s...

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Abstract

The invention relates to the technical field of preparation of a ternary positive electrode material for lithium ion batteries, in particular to a method for synthesizing a nickel-cobalt-manganese ternary precursor by utilizing a thick hopper control system. According to the invention, slurry at the bottom of a reaction kettle is pumped into a thick hopper through a pump on a material feeding pipeline, and no stirring is carried out in the thick hopper; gravity is utilized to carry out sedimentation and realize solid-liquid separation; then thick slurry is refluxed into the reaction kettle toincrease the solid content; at the same time, clear liquid is discharged to the outside through a clear liquid discharge pipeline; the system can be applied to continuous production and upgrading, canalso be used for intermittent production and upgrading, and can be opened in any process of production. When the system is in operation, the proportion of the clear liquid discharge can be increasedby increasing the material feeding flow rate, and the flow rate of the thick slurry can be changed by the opening degree of a thick slurry reflux pipeline valve. By adopting the method provided by theinvention, the production cost is effectively reduced, the operation difficulty is reduced, and the safety is improved; the precursor produced by the invention has more excellent physical and chemical indexes, and a sintered positive electrode material has more excellent performance.

Description

technical field [0001] The invention relates to the technical field of preparation of ternary positive electrode materials for lithium-ion batteries, in particular to a method for synthesizing a nickel-cobalt-manganese ternary precursor using a dense bucket control system. Background technique [0002] Currently, the rapid development of electric vehicles and hybrid vehicles has promoted the rapid development of lithium-ion battery technology. At present, lithium-ion battery cathode materials, such as lithium cobaltate, lithium iron phosphate, and lithium manganate, all have the defect of low capacity, which cannot meet the requirements of future electric vehicle development. Lithium nickel cobalt manganese oxide has the advantages of high specific capacity, good thermal stability and low price. It is the most promising type of cathode material for lithium ion batteries, and has a good application prospect in the field of electric vehicles. [0003] Nickel-cobalt-manganese ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/18B01J19/00B01J4/00B01J4/02
CPCB01J4/001B01J4/008B01J4/02B01J19/0006B01J19/18Y02E60/10
Inventor 李世辉沈震雷王小敏王孝猛周勤俭王宏刚陈要忠
Owner HUAYOU NEW ENERGY TECH (QUZHOU) CO LTD
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