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Preparation method of anode material of lithium ion battery and preparation method of precursor of anode material

A lithium-ion battery, cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficult to control production conditions, poor uniformity, large particles, etc., to achieve good uniformity, full gram capacity, and operation. simple effect

Inactive Publication Date: 2018-11-27
TIANJIN XINDONGYUAN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a simple and efficient method for processing cathode material precursors and cathode materials, which solves the problems of difficult control of production conditions, large particles and poor uniformity in traditional processes

Method used

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  • Preparation method of anode material of lithium ion battery and preparation method of precursor of anode material
  • Preparation method of anode material of lithium ion battery and preparation method of precursor of anode material
  • Preparation method of anode material of lithium ion battery and preparation method of precursor of anode material

Examples

Experimental program
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Effect test

example example 1

[0021] Example Case 1. According to Li[Ni 0.5 co 0.2 mn 0.3 ]O 2 For the stoichiometric ratio, take 58.69g foam nickel, 23.57g metal cobalt plate, and 32.96g manganese sheet and slowly add them to 200.0g, 80.0g, and 120.0g of concentrated nitric acid with a concentration of 65% to fully dissolve, and add a total of 400.0g , 160.0g, and 240.0g of high-purity water are diluted to prepare the corresponding nitrate aqueous solution.

[0022] The above dark green nickel nitrate solution, red cobalt nitrate solution and pink manganese nitrate solution were mixed and stirred, and 137.9g ​​lithium nitrate and 200.0g high-purity water were added to fully mix and dissolve, and a light brown mixed solution was obtained after stirring evenly.

[0023] Set the pressure of the high-pressure sprayer to 50.0kg, spray the above light brown solution, and the size of the mist particles is 1-15 microns; set the temperature of the high-temperature gas phase reactor to 2000 degrees, so that the ...

example example 2

[0026] Example case 2, according to Li[Ni 0.8 co 0.1 mn 0.1 ]O 2 According to the stoichiometric ratio, 232.6g nickel nitrate hexahydrate, 29.1g cobalt nitrate hexahydrate, and 25.1g manganese nitrate tetrahydrate were dissolved in 400.0g, 50.0g, and 50.0g high-purity water respectively to obtain the corresponding nitrate aqueous solution.

[0027] Mix and stir the above-mentioned dark green nickel nitrate solution, red cobalt nitrate solution and pink manganese nitrate solution, add 68.9g of lithium nitrate and 100.0g of high-purity water to fully mix and dissolve, and obtain a gray-green mixed solution after stirring evenly.

[0028] Set the pressure of the high-pressure sprayer to 60kg, spray the above light brown solution, and the size of the mist particles is 1-15 microns; pass through the plasma combustion furnace (average temperature is about 3000 degrees), so that the mist particles can fully react with oxygen at high temperature , to obtain black powder.

[0029] ...

example example 3

[0031] Example Case 3, according to LiNi 0.5 mn 1.5 o 4 According to the stoichiometric ratio, 145.4g of nickel nitrate hexahydrate and 376.5g of manganese nitrate tetrahydrate were dissolved in 400g and 800g of high-purity water respectively to obtain the corresponding nitrate aqueous solution.

[0032] The above dark green nickel nitrate solution and pink manganese nitrate solution were mixed and stirred, and 68.9 g of lithium nitrate was added to fully mix and dissolve, and a light brown mixed solution was obtained after stirring evenly.

[0033] Set the pressure of the high-pressure sprayer to 40kg, spray the above light brown solution, and the size of the mist particles is 1-15 microns; set the temperature of the high-temperature gas phase reaction furnace to 1500 degrees, so that the mist particles and oxygen can fully react at high temperature, A black powder is obtained.

[0034] Pass the above black powder into a high-temperature sintering furnace with pure oxygen,...

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Abstract

The invention relates to a preparation method of an anode material of a lithium ion battery and a preparation method of a precursor of the anode material. According to a traditional preparation mannerof the lithium ion battery, an anode material is prepared through the steps of coprecipitation, drying, lithium blending, drying and calcining, and coprecipitation conditions are difficult to control. According to the improved technical scheme, a coprecipitation method is not utilized, and a nitrate solution which can be dissolved in water and easily decomposed at a high temperature is directly subjected to hyperbaric spraying and high-temperature combustion in sequence so as to obtain the anode material. Lithium salt is mixed with Mn, Co, Ni and a water-soluble salt solution, so that the mixing uniformity is improved; and the mixture is dispersed through hyperbaric spraying, and sprayed particles react at a high temperature so as to adequately oxide reactants, so that particles with uniform size and relatively small particle size (1.5-2 microns) can be obtained. By virtue of the particles with small particle size and good uniformity, the contact between an active material and electrolyte can be promoted, so that the electrochemical properties such as multiplying power of the battery are improved.

Description

technical field [0001] The invention relates to a manufacturing method of a lithium ion battery, in particular to a positive electrode material of the lithium ion battery and a preparation method of a precursor of the positive electrode material. Background technique [0002] As a new generation of energy storage and power batteries, lithium-ion batteries are developing rapidly in the fields of various consumer electronics products and electric vehicles. In particular, the performance of lithium-ion power batteries, which are the core components in new energy vehicles, is directly related to the smooth promotion of new energy vehicles and determines the future of the new energy vehicle industry. The performance and cost of lithium-ion batteries depend largely on the cathode material. At present, the performance of cathode materials has become a bottleneck restricting the development of lithium-ion batteries, so research on better-performing cathode materials for lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/364H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 杨凡晁流
Owner TIANJIN XINDONGYUAN SCI & TECH
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