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A preparation method of a through-hole type lithium battery negative electrode material

A negative electrode material, lithium battery technology, applied in the direction of battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of structure collapse and pulverization, unstable solid electrolyte interface, product cycle performance decline, etc., to achieve a mild reaction process, The effect of continuous electron diffusion path and excellent electrical conductivity

Inactive Publication Date: 2019-01-11
合肥哈工安循环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: when the traditional lithium battery uses silicon as the negative electrode material, the structure collapses and powders due to the volume expansion of silicon during the cycle process, and unstable solids are easily formed on the surface of the material during use. Electrolyte interface, which leads to the disadvantages of product cycle performance decline, provides a preparation method for through-hole lithium battery negative electrode materials

Method used

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  • A preparation method of a through-hole type lithium battery negative electrode material

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example 1

[0021]In parts by weight, take 30 parts of titanate, 60 parts of silicate, 200 parts of glycerin, and 10 parts of gelatin, first pour the gelatin and glycerin into a beaker, and place the beaker on a digital speed measuring constant temperature magnetic stirrer, At a temperature of 50°C and a rotation speed of 600r / min, heat and stir to dissolve for 60 minutes, then pour the material in the beaker into a three-necked flask, and add titanate and silicate into the three-necked flask, and then heat at 85 ℃, the rotation speed is 600r / min, after heating and stirring for 5 hours, under the pressure of 500mmHg and the temperature of 180℃, the residual glycerin is removed by concentration under reduced pressure, the material is discharged, cooled, and the refined concentrate is obtained; the obtained refined concentrate The sulfuric acid solution with a mass fraction of 50% is mixed and poured into a hydrothermal kettle, and then the hydrothermal kettle is sealed. Under the conditions...

example 2

[0023] In terms of parts by weight, take 60 parts of silicate, 200 parts of glycerin, and 10 parts of gelatin in sequence. First, pour the gelatin and glycerin into a beaker, and place the beaker on a digital speed measuring constant temperature magnetic stirrer at a temperature of 50 ° C. At a rotation speed of 600r / min, heat and stir to dissolve for 60min, then pour the material in the beaker into a three-necked flask, and add silicate into the three-necked flask, then at a temperature of 85°C and a rotation speed of 600r / min, After heating and stirring for 5 hours, at a pressure of 500mmHg and a temperature of 180°C, concentrate under reduced pressure to remove residual glycerin, discharge the material, and cool to obtain a refined concentrate; the obtained refined concentrate and a sulfuric acid solution with a mass fraction of 50% Mix and pour into the hydrothermal kettle, then seal the hydrothermal kettle, under the conditions of temperature 180°C, pressure 1.6MPa, rotati...

example 3

[0025] In parts by weight, take 30 parts of titanate, 60 parts of silicate, 200 parts of glycerin, and 10 parts of gelatin, first pour the gelatin and glycerin into a beaker, and place the beaker on a digital speed measuring constant temperature magnetic stirrer, At a temperature of 50°C and a rotation speed of 600r / min, heat and stir to dissolve for 60 minutes, then pour the material in the beaker into a three-necked flask, and add titanate and silicate into the three-necked flask, and then heat at 85 ℃, the rotation speed is 600r / min, after heating and stirring for 5 hours, under the pressure of 500mmHg and the temperature of 180℃, the residual glycerin is removed by concentration under reduced pressure, the material is discharged, cooled, and the refined concentrate is obtained; the obtained refined concentrate The sulfuric acid solution with a mass fraction of 50% is mixed and poured into a hydrothermal kettle, and then the hydrothermal kettle is sealed. Under the condition...

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Abstract

The invention discloses a preparation method of a through-hole type lithium battery negative electrode material, belonging to the technical field of new energy materials. At first, that gelatin is dissolve in glycerol, then titanate and silicate are added, aft heating and stirring reaction for 3-5h, the gelatin is concentrated unde reduced pressure, the residual glycerol is removed, and the gelatin is cooled to obtain a refined concentrate; 3 to 5 hour after that refine concentrate and the sulfuric acid solution are mixed, the hydrothermal reaction is carried out, the material is discharged, is and dried to obtain a hydrothermal carbonized material. Then the hydrothermal carbonized material is dispersed in water, nanometer magnesium powder, nanometer iron powder and sodium fluoride are added, and after ultrasonic impregnation, the hydrothermal carbonized material is filtered and dried to obtain the impregnated hydrothermal carbonized material. The impregnated hydrothermal carbonized material is transferred into a vacuum furnace, the temperature is programmed to be 1480-1500 DEG C, the reaction temperature is preserved and vacuum reacted, then the material is cooled, discharged, washed with dilute hydrochloric acid, washed with water and dried to obtain a through-hole type lithium battery negative electrode material. The through-hole type lithium battery negative electrode material obtained by the invention has excellent cycle performance.

Description

technical field [0001] The invention discloses a method for preparing a negative electrode material of a through-hole lithium battery, belonging to the technical field of new energy materials. Background technique [0002] With the continuous progress of science and technology, the continuous development of electronic technology, miniaturized and miniaturized equipment is increasing, which puts forward higher requirements for equipment power supply. Lithium-ion batteries are widely used in various fields due to their high capacity, green environmental protection and sustainability, such as tablet computers, power tools, notebook computers, street lamp backup power, electric vehicles, mobile phones, navigation lights, cameras, video cameras Lithium batteries are also known as "the most promising chemical power source" for lithium batteries, small household appliances, and even military equipment and satellites. [0003] Since Exxon's M.S.Whittingham used titanium sulfide as ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/052
CPCH01M4/362H01M4/386H01M4/62H01M4/625H01M4/626H01M4/628H01M10/052Y02E60/10
Inventor 裘友玖马俊杰朱东东
Owner 合肥哈工安循环保科技有限公司
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