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A kind of preparation method of large particle size doped tricobalt tetroxide

A technology of cobalt tetroxide and large particle size, applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of cumbersome process, unfavorable industrial production, etc., and achieve the effects of environmental friendliness, avoiding excessive impurity content, and simple requirements for calcining equipment.

Active Publication Date: 2020-04-07
南通金通储能动力新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent requires multiple cycles of crystallization in the cobalt carbonate synthesis stage, the process is cumbersome, and it is not conducive to industrial production

Method used

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  • A kind of preparation method of large particle size doped tricobalt tetroxide
  • A kind of preparation method of large particle size doped tricobalt tetroxide
  • A kind of preparation method of large particle size doped tricobalt tetroxide

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Experimental program
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Effect test

Embodiment 1

[0042] The production steps are the same as above, and will not be repeated here. The specific parameters in each step are as follows:

[0043] The configured A solution is 1mol / L cobalt chloride solution.

[0044] The prepared B solution is 1mol / L sodium carbonate solution.

[0045] The configured C solution is 5mol / L ammonia solution, and 5mL of hydrazine hydrate solution with a mass content of 30% is added to each liter of ammonia solution.

[0046] The configured D solution is 5mol / L hydrogen peroxide solution.

[0047] The configured E solution is 2mol / L sodium hydroxide solution.

[0048] The configured F solution is 8.1g / L cerium nitrate solution.

[0049]Synthesis reaction: at the beginning of the synthesis reaction, A solution, B solution, C solution, and F solution are simultaneously added to the reaction kettle, and the cobalt carbonate synthesis reaction is carried out under strong stirring. During the reaction, the ammonia concentration of the reaction solutio...

Embodiment 2

[0057] The production steps are the same as above, and will not be repeated here. The specific parameters in each step are as follows:

[0058] The configured A solution is a 1.5mol / L cobalt sulfate solution.

[0059] The prepared B solution is 1.5mol / L sodium carbonate solution.

[0060] The configured C solution is 8mol / L ammonia solution, and 15mL of hydrazine hydrate solution with a mass content of 30% is added to each liter of ammonia solution.

[0061] The configured D solution is a 6mol / L hydrogen peroxide solution.

[0062] The configured E solution is 4mol / L sodium hydroxide solution.

[0063] The F solution of configuration is the magnesium chloride solution of 16.2g / L.

[0064] Synthesis reaction: At the beginning of the synthesis reaction, add A solution, B solution, and C solution into the reaction kettle concurrently. After 50 hours of synthesis reaction, add F solution into the reaction kettle at 0.2 times the flow rate of the cobalt sulfate solution, and ca...

Embodiment 3

[0072] The production steps are the same as above, and will not be repeated here. The specific parameters in each step are as follows:

[0073] The configured A solution is a 2mol / L cobalt nitrate solution.

[0074] The prepared B solution is 2mol / L sodium carbonate solution.

[0075] The configured solution C is a 10mol / L ammonia solution, and 20mL of a 30% hydrazine hydrate solution is added to each liter of the ammonia solution.

[0076] The configured D solution is 8mol / L hydrogen peroxide solution.

[0077] The configured E solution is a 6mol / L sodium hydroxide solution.

[0078] The configured F solution is a 48.6g / L aluminum trichloride solution.

[0079] Synthesis reaction: At the beginning of the synthesis reaction, A solution, B solution, and C solution are added to the reaction kettle in parallel, and the cobalt carbonate synthesis reaction is carried out under strong stirring. After the synthesis is completed, the F solution is added to the reaction kettle at t...

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Abstract

The invention provides a method for preparing large particle size doped tricobalt tetroxide. The method takes a cobalt solution with a certain concentration as a cobalt source, a sodium carbonate solution is taken as a precipitant, an ammonia solution is taken as a complexing agent, a hydrazine hydrate solution is taken as a reducing agent, a mixed solution of a doping element solution and the complexing agent is taken as a dopant, and cobalt carbonate having a particle size of 20-30 [mu]m is synthesized in the shortest time through modes such as the reduction of the amount of crystal nucleusformed in the initial stage of synthesis. In the reaction process, the appropriate time is selected to add the doped solution into a reaction kettle to participate in the reaction; after the synthesiscomes to an end, under a certain pH value condition, a hydrogen peroxide solution with a certain solubility is utilized to oxidize the synthetic product into the hydroxyl cobaltous oxide, and the mixture is washed, dried and calcined to obtain the large particle size doped tricobalt tetroxide. The synthesis time of the process is short and is only 10-15 h, the product physicochemical index is good, the laser particle size is 15-25 [mu]m, the tap density is more than 2.0 g / cm3, the specific surface area is 1.0-3.0 m<2> / g, and the doping elements include Ni, Mn, Al, Cu, Ce, Y, Nb and Mg.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a method for preparing large-grained doped tricobalt tetroxide used for preparing lithium cobalt oxide, a cathode material of lithium ion batteries. Background technique [0002] Lithium-ion batteries made of lithium cobalt oxide as the positive electrode material have the characteristics of light weight, large capacity, high specific energy, high working voltage, stable discharge, suitable for high-current discharge, good cycle performance, and long life. They are mainly used in 3C digital fields . [0003] Lithium cobalt oxide is developing in the direction of high voltage, high compaction, and high cycle performance, and the requirements for the raw material cobalt trioxide are getting higher and higher. co 3 o 4 It is a functional material with special structure and properties, Co 3 o 4 The market is already facing the status quo of gradual shri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04
CPCC01G51/04C01P2004/03C01P2004/61C01P2006/10C01P2006/12
Inventor 常全忠陈晓闯王红忠刘世红吴来红吴天红岳心圆
Owner 南通金通储能动力新材料有限公司
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