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Power type lithium ion battery ternary material and preparation method

A lithium-ion battery, ternary material technology, applied in electrical components, battery electrodes, secondary batteries, etc., to achieve the effects of consistent morphology, increased contact area, and shortened diffusion paths

Inactive Publication Date: 2020-04-24
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still a series of safety problems in the commercial application of ternary materials, and the rate performance and cycle performance need to be further improved.

Method used

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  • Power type lithium ion battery ternary material and preparation method
  • Power type lithium ion battery ternary material and preparation method
  • Power type lithium ion battery ternary material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a power type lithium ion battery ternary material, the steps are as follows:

[0029] (1) Pre-weigh the nickel acetate, cobalt, and manganese salts according to the molar ratio of 1:1:1;

[0030] (2) The solvent is a mixed solution of ethanol and water, the volume ratio is 1:1, and the solvent is deoxidized in advance;

[0031] (3) Dissolve the weighed nickel, cobalt, and manganese salts in the solvent respectively, and then mix them completely to obtain a mixed salt solution;

[0032] (4) Fully dissolve the previously weighed precipitant oxalic acid (10% excess), then add 10% P123 aqueous solution as a soft template agent, the amount of the template agent added is 2g / 100mL, and stir well to obtain Precipitant control solution;

[0033] (5) Under the protection of nitrogen, control the reaction temperature at 35°C, the stirring speed at 800 rpm, and the feed rate at 0.8 ml / min to feed the mixed salt solution and the precipitant control solution...

Embodiment 2

[0047] A preparation method of a power type lithium ion battery ternary material, the steps are as follows:

[0048] (1) Pre-weigh the nickel acetate, cobalt, and manganese salts according to the molar ratio of 5:2:3 for later use;

[0049] (2) The solvent is ethanol solution, and the solvent is deoxidized in advance;

[0050] (3) Dissolve the weighed nickel, cobalt, and manganese salts in the solvent respectively, and then mix them completely to obtain a mixed salt solution;

[0051] (4) Fully dissolve the previously weighed precipitant oxalic acid (over 30%), then add 10% P123 aqueous solution as a soft template agent, the amount of template agent added is 3g / 100mL, stir well, and obtain Precipitant control solution;

[0052] (5) Under the protection of nitrogen, control the reaction temperature to 55°C, the stirring speed to 600 rpm, and the feed rate to 0.6 ml / min to add the mixed salt solution and the precipitant control solution containing soft templates into the reactio...

Embodiment 3

[0061] A preparation method of a power type lithium ion battery ternary material, the steps are as follows:

[0062] (1) Pre-weigh the nickel acetate, cobalt, and manganese salts according to the molar ratio of 8:1:1 for later use;

[0063] (2) The solvent is ethanol aqueous solution, the volume ratio is 2:1, and the solvent is deoxidized in advance;

[0064] (3) Dissolve the weighed nickel, cobalt, and manganese salts in the solvent respectively, and then mix them completely to obtain a mixed salt solution;

[0065] (4) Fully dissolve the previously weighed precipitant oxalic acid (30% excess), then add 10% P123 as a soft template agent, the amount of the template agent added is 4g / 100mL, and stir well to obtain a soft template containing solution of precipitant;

[0066] (5) Under the protection of nitrogen, control the reaction temperature to 50°C, the stirring speed to 700 rpm, and the feed rate to 0.6 ml / min to add the mixed salt solution and the precipitant control sol...

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Abstract

The invention provides a power type lithium ion battery ternary material and a preparation method thereof. According to the method, a macromolecular surfactant is used as a soft template to assist a precipitation reaction, and the nano nickel-cobalt-manganese ternary positive electrode material with uniform morphology and uniform granularity is prepared through sol-gel, so that the electrochemicalproperties such as power performance, discharge capacity and cycle performance of the lithium ion battery are improved. The nano nickel-cobalt-manganese ternary positive electrode material with consistent morphology and uniform particle size prepared by the method has the advantages that the contact area with an electrolyte solution is obviously increased when the nano nickel-cobalt-manganese ternary positive electrode material is used in a lithium ion battery, and meanwhile, the diffusion path of lithium ions is shortened, so that the electrochemical properties such as rate capability, gramcapacity and cycle performance of the lithium ion battery are improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a ternary material for a power-type lithium-ion battery and a preparation method thereof. Background technique [0002] Cathode materials are an important part of lithium-ion batteries. Nickel-cobalt-manganese ternary cathode materials with a layered structure have been used as cathode materials for power lithium-ion batteries due to their cheaper price, high capacity, and good cycle performance. However, there are still a series of safety problems in the commercial application of ternary materials, and the rate performance and cycle performance need to be further improved. The shortage of nickel-cobalt-manganese ternary cathode materials has restricted its further extensive application and development. Many scholars at home and abroad have been actively trying to further improve and enhance the comprehensive electrochemical performance of ternary lithium-ion batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 赵尧敏潘玮卫武涛米立伟李英华周婉婷张丰
Owner ZHONGYUAN ENGINEERING COLLEGE
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