Method for preparing nickel-cobalt-manganese oxide

A technology for nickel-cobalt-manganese oxide and preparation steps is applied in the field of preparation of nickel-cobalt-manganese oxide, which can solve the problems of poor product particle size uniformity, long ammonia in the process, ammonia nitrogen pollutants, etc., and achieves uniform ion and electron migration and overall The effect of large particles and stable crystal structure

Inactive Publication Date: 2019-11-01
余姚市鑫和电池材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the existing process is long, ammonia exists in the system, ammonia nitrogen pollutants are easily produced, and the particle size unif

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add 907.9g of nickel chloride, 130g of cobalt chloride, 134g of manganese chloride, 47.3g of magnesium chloride, and 48g of aluminum chloride into 3200mL of water and mix thoroughly, add 3.8g of citric acid (H 2 C 2 o 4 ) was stirred for 1 hour, then purified in a strong magnetic box-type filter to obtain an intermediate liquid, and 30% sodium hydroxide solution was purified in a strong magnetic box-type filter to obtain an alkaline precipitant, and the intermediate liquid was obtained by At a speed of 1.6 liters / hour, the alkaline precipitant is dispersed at a speed of 0.8 liters / hour and enters the non-magnetic reactor at the same time, and the reaction temperature is controlled at 80°C in a liquid-phase environment with both axial flow and radial flow. The pH value is 10.8-10.2, which makes nickel, cobalt, manganese, aluminum, and magnesium ions undergo affinity co-precipitation through hydroxyl bonds. After affinity co-precipitation, they are reconstructed and modi...

Embodiment 2

[0057] Add 972.7g of nickel chloride, 130g of cobalt sulfate, 134g of manganese chloride, 23.5g of magnesium chloride, and 24.1g of aluminum chloride into 3000mL of water, and then add 3.2g of citric acid with a weight ratio of 2:1 (C 6 h 8 o 7 ), oxalic acid (H 2 C 2 o 4 ) mixture was stirred for 2.5 hours, then purified in a non-magnetic box-type filter to obtain an intermediate liquid, and 40% sodium hydroxide solution was purified in a strong magnetic box-type filter to obtain an alkaline precipitant, and the intermediate liquid At a rate of 1.8 liters / hour, the alkaline precipitant is dispersed at a rate of 0.82 liters / hour and simultaneously enters the strong magnetic reactor, and the reaction temperature is controlled at 75°C in a liquid-phase environment with both axial flow and radial flow. The pH value is 10.6-11.1, so that nickel, cobalt, manganese, aluminum, and magnesium ions are co-precipitated through the affinity co-precipitation of hydroxyl bonds. After th...

Embodiment 3

[0059] Add 1011.6g of nickel chloride, 130g of cobalt chloride, 134g of manganese chloride, 9.2g of magnesium chloride, and 9.8g of aluminum chloride into 3900mL of water, mix well, add 3.2g of citric acid (C 6 h 8 o 7 ) was stirred for 2.5 hours, then purified in a non-magnetic box-type filter to obtain an intermediate liquid, and 40% sodium hydroxide solution was purified in a strong magnetic box-type filter to obtain an alkaline precipitant, and the intermediate liquid was obtained by At a speed of 1.5 liters / hour, the alkaline precipitant is dispersed at a speed of 0.6 liters / hour and enters the strong magnetic reactor at the same time, and the reaction temperature is controlled at 65°C in a liquid phase environment with both axial flow and radial flow. The pH value is 13.5-114, which makes nickel, cobalt, manganese, aluminum, and magnesium ions pass through the affinity co-precipitation of hydroxyl bonds. After the affinity co-precipitation, it is reconstructed and modif...

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Abstract

The invention relates to the field of lithium battery anode materials and in particular to a method for preparing a nickel-cobalt-manganese oxide. The method comprises the following steps: 1) dissolving a soluble metal salt into water so as to obtain a salt solution, wherein the total concentration of the soluble metal salt in the salt solution is 50-120g/L; 2) putting a slow control agent into the salt solution, and stirring the solution for a certain time at a rotation speed of 80-200rpm so as to obtain an intermediate liquid, wherein the mass ratio of the slow control agent to the soluble metal salt is (1-18):1000; 3) putting the intermediate liquid and an alkali precipitant into a reaction container, and performing a heating reaction till slurry is formed after precipitation; and 4) washing the slurry so as to obtain a sphere-like precursor, and performing thermal treatment on the sphere-like precursor in a low pressure environment, so as to obtain the nickel-cobalt-manganese oxideafter thermal treatment. The method is low in energy consumption in the preparation process and has the advantages of being energy-saving and environment-friendly since no ammonia nitrogen-containingenvironment pollutant is generated, the preparation method is concise and efficient, and the unit time yield is large in the industrialization process.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium batteries, in particular to a preparation method of nickel-cobalt-manganese oxide. Background technique [0002] With the continuous deterioration of the earth's atmospheric environment, people pay more and more attention to the development of new technologies and processes for clean energy and energy storage materials. Lithium-ion power batteries have attracted great attention due to their good characteristics such as high specific energy, high safety, and renewability. The development and popularization of the special automobile industry among ordinary people around the world, in order to avoid the impact of the exhaust gas produced by gasoline vehicles on the atmosphere, provide a broad prospect for the development of electric vehicles, so that the special performance power lithium-ion batteries used for them can be used Cathode materials and their precursors will bring ...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01G53/04C01G51/04C01G45/02C01F7/34C01F7/30C01F7/02C01F5/06H01M4/505H01M4/525
CPCC01F5/06C01F7/02C01F7/30C01F7/34C01G45/02C01G51/04C01G53/006C01G53/04C01P2004/61C01P2004/82C01P2006/11H01M4/505H01M4/525Y02E60/10
Inventor 高月春毛信长
Owner 余姚市鑫和电池材料有限公司
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