Silicon-based nickel-cobalt-manganese lithium battery electrode material and preparation method thereof

A silicon-based nickel-cobalt-manganese-lithium, ternary lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of poor stability of nickel-cobalt-lithium-manganese oxide ternary materials, affecting battery safety, and poor structural stability. and other problems, to achieve the effect of low price, uniform size and clean production process

Active Publication Date: 2017-05-31
湖南国润宏泰智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a silicon-based nickel-cobalt-manganese-lithium ternary lithium battery electrode material, which is used to solve the problem of uneven doping in the existing doping technology. In practical applications, the ternary lithium battery electrode material is due to its nickel High content, poor structural stability, and then affect the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add cobalt sulfate and manganese sulfate into deionized water, stir evenly to form a solution, add sodium hydroxide solution with a concentration of 1.0mol / L, and ultrasonically oscillate for 1 hour to obtain Co y mn 1-x-y (OH) 2 Dispersion liquid, wherein the molar ratio of cobalt sulfate, manganese sulfate, deionized water and sodium hydroxide is 0.6:0.2:5:1;

[0036] (2) Reconfigure 0.2 mole fraction of nickel sulfate solution, the ratio of nickel sulfate to deionized water is 0.2:8, nickel sulfate solution and Co 0.6 mn 0.2 (OH) 2 Dispersion mixed to generate uniform Ni 0.2 co 0.6 mn 0.2 (OH) 2 Precursor;

[0037] (3) Take graphene and methyltrichlorosilane with a molar ratio of 1:5, heat the mixture of graphene and methyltrichlorosilane to 80°C, and 0.2 co 0.6 mn 0.2 (OH) 2 The precursor is added to the mixed solution, the power of the ultrasonic wave is set to 120W, the speed of the stirring is 100rpm, the time is 2h, and the ultrasonic stirring is...

Embodiment 2

[0042] (1) Add cobalt chloride and manganese chloride to deionized water, stir evenly to form a solution, add sodium hydroxide solution with a concentration of 1.0mol / L, and ultrasonically oscillate for 1 hour to obtain Co y mn 1-x-y (OH) 2 Dispersion liquid, wherein the molar ratio of cobalt chloride, manganese chloride, deionized water and sodium hydroxide is 0.6:0.3:7:1;

[0043] (2) Reconfigure 0.1 mole fraction of nickel chloride solution, the ratio of nickel chloride to deionized water is 0.1:8, nickel chloride solution and Co 0.6 mn 0.2 (OH) 2 Dispersion mixed to generate uniform Ni 0.1 co 0.6 mn 0.3 (OH) 2 Precursor;

[0044] (3) Take graphene and dimethyldichlorosilane with a molar ratio of 1:5, heat the mixture of graphene and dimethyldichlorosilane to 80°C, and 0.1 co 0.6 mn 0.2 (OH) 2 The precursor is added to the mixed liquid, the power of the ultrasonic wave is set to 150W, the speed of the stirring is 60rpm, the time is 1.2h, and the ultrasonic stirr...

Embodiment 3

[0048] (1) Add cobalt nitrate and manganese nitrate into deionized water, stir evenly to form a solution, add sodium hydroxide solution with a concentration of 1.0mol / L, and ultrasonically oscillate for 1 hour to obtain Co 0.7 mn 0.1 (OH) 2 Dispersion liquid, wherein the molar ratio of cobalt nitrate, manganese nitrate, deionized water and sodium hydroxide is 0.7:0.1:9:1;

[0049] (2) Reconfigure x mole fraction of nickel nitrate solution, the ratio of nickel nitrate to deionized water is 0.2:10, mix nickel nitrate solution and Co 0.7 mn 0.1 (OH) 2 Dispersion mixed to generate uniform Ni 0.2 co 0.7 mn 0.1 (OH) 2 Precursor;

[0050] (3) Take graphene and phenyltrichlorosilane with a molar ratio of 1:5, heat the mixture of graphene and phenyltrichlorosilane to 80°C, and place the Ni 0.2 co 0.7 mn 0.1 (OH) 2 Add the precursor to the mixed solution, set the ultrasonic power to 280W, the stirring speed to 170rpm, and the time to 1.5h, and stir evenly with the ultrasonic...

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Abstract

The invention provides a silicon-based nickel-cobalt-manganese lithium battery electrode material and a preparation method thereof. According to the preparation method, a precursor is prepared from nickel, cobalt and manganese, organic silicon is introduced to form gel in the preparation process, spray drying is carried out to the gel by using a jet type spray drier, at the same time graphene slurry is introduced, in the rapid drying process, graphene functions as a spatial barrier of granules, then the sizes of the granules can be limited, excessive growth of the granules can be inhibited, and the silicon-based nickel-cobalt-manganese lithium battery electrode material which is uniform in granularity and good in conductivity can be prepared. By adopting the preparation method provided by the invention, the technical problems that the security of a battery can be affected as a ternary lithium battery electrode material is high in nickel content and poor in structural stability in practical application can be effectively solved, the stability of the ternary lithium battery electrode material can be effectively improved, and furthermore the use security of a ternary lithium battery can be improved.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a silicon-based nickel-cobalt-manganese-lithium ternary lithium battery electrode material and a preparation method thereof. Background technique [0002] In recent years, with the popularity of portable electronic devices and the development of electric vehicles, lithium-ion batteries as a new generation of high-energy power sources have received great attention. The main constituent materials of lithium-ion batteries include electrolyte, separator materials, positive and negative electrode materials, etc. The positive electrode material occupies a large proportion (the mass ratio of positive and negative electrode materials is 3: 1~4:1), because the performance of the positive electrode material directly affects the performance of the lithium-ion battery, and its cost also directly determines the cost of the battery. At present, the positive electrode active materials of lithi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/505H01M4/525H01M10/0525
CPCH01M4/362H01M4/386H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 陈庆王镭迪曾军堂
Owner 湖南国润宏泰智能装备有限公司
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