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Active-carbon-microball coated metal composition negative polar material and preparing method

A technology of metal composites and negative electrode materials, applied in battery electrodes, electrical components, circuits, etc., can solve problems such as limited stability, complicated preparation process, and high raw material prices, and achieve good industrial application value, high charging specific capacity, and preparation The effect of simple method

Inactive Publication Date: 2006-10-25
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main problems of graphite negative electrode materials are: (1) Artificial graphite needs to be prepared by high-temperature graphitization at 1900°C to 2800°C, and the temperature is too high; (2) The theoretical specific capacity is 372mAh / g, which is relatively low; (3) Fragile structure leads to very limited stability and is also highly sensitive to electrolyte
However, the price of raw materials is relatively high for practical use of this method, the preparation process is more complicated and difficult to control, and the Cl in the product - , OH - It is difficult to remove impurities such as

Method used

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  • Active-carbon-microball coated metal composition negative polar material and preparing method

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example 1

[0030] Dissolve 5.5g of resorcinol in 5mL of formaldehyde solution (37%), then add deionized water to make a 20mL clear solution, add 0.0275g of anhydrous NaOH as a catalyst, and then add 1g of ball-milled SnO 2 powder, stir well. This solution was then dispersed in 200 mL of kerosene dissolved with 12 g of SPAN80 to form a reverse micellar emulsion. At 20° C., the rotation speed was 200 rpm to carry out the phenolic polymerization reaction for 24 hours, and then the phenolic gel balls were obtained. The obtained solid microspheres were freed of surface-adhered kerosene in vacuum at 200 °C. Then, in the tubular reactor, under the protection of nitrogen atmosphere, the temperature was raised to 800°C, and the temperature was kept constant for 2 hours. After the resin carbonization and carbothermal reduction process, and finally cooled naturally in the furnace, the activated carbon microsphere-coated metal tin spherical composite was obtained. material. The measured average p...

example 2

[0032] Dissolve 5.5g resorcinol in 10mL formaldehyde solution (37%), then add deionized water to make a 20mL clear solution, add 0.05g anhydrous Na 2 CO 3 As a catalyst, 2 g of ball-milled SnO 2powder, stir well. The solution was then dispersed in 400 mL of kerosene dissolved in 15 g of SPAN80 to form a reverse micellar emulsion. At 30° C., stirring at 600 rpm to carry out phenolic polymerization reaction for 24 hours, to obtain phenolic gel balls. The obtained solid microspheres were freed of surface-adhered kerosene in vacuum at 200 °C. Then, in the tubular reactor, under the protection of nitrogen atmosphere, the temperature was raised to 900°C, and the temperature was kept constant for 2 hours. After resin carbonization and carbothermal reduction process, and finally cooled naturally in the furnace, the spherical composite of activated carbon microspheres coated with metal tin was obtained. material. It is measured that the average particle diameter of the product is ...

example 3

[0034] Dissolve 5.5g resorcinol in 15mL formaldehyde solution (37%), then add deionized water to make a 20mL clear solution, add 0.165g anhydrous NaCO 3 As a catalyst, 5 g of ball-milled SnO 2 powder, stir well. This solution was then dispersed in 1000 mL of cyclohexylamine dissolved in 10 g of SPAN80 to form a reverse micellar emulsion. At 80° C., with stirring at 1200 rpm, the phenolic gel was polymerized for 3 hours to obtain phenolic gel balls. The obtained solid microspheres were freed of surface-adhered cyclohexylamine in vacuum at 200°C. Then, in the tubular reactor, under the protection of nitrogen atmosphere, the temperature was raised to 1200°C, and the temperature was kept constant for 2 hours. After resin carbonization and carbothermal reduction process, and finally cooled naturally in the furnace, the spherical composite of activated carbon microspheres coated with metal tin was obtained. material. It is measured that the average particle size of the product i...

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Abstract

This invention relates to a compound negative material with micro-balls of active carbon covering metals and its preparation method characterizing in putting metal particles in hollow carbon micro-balls to make up of the structure of the material, in which, said metal is a Li-stored active metal, the mass percentage is 30-80% taking resorcin, methanal, a metal or its metal oxide as the raw material to be prepared by a method of reverse micelle latex polymerization and high temperature carbonization recovery.

Description

technical field [0001] The active carbon microsphere-coated metal composite negative electrode material and its preparation method belong to the technical field of chemical engineering and energy materials, and particularly relate to the technical field of preparation of lithium secondary battery negative electrode materials. Background technique [0002] Lithium-ion battery is a new type of high-energy secondary battery that began to be put into practical use in the 1990s. It has outstanding advantages such as high voltage, high energy density, good cycle performance, small self-discharge, and no memory effect. It has been widely used in mobile phones and notebooks. Computers, digital products, electric tools and other portable equipment fields. As the power source of electric vehicles and hybrid vehicles, lithium-ion batteries have shown good application prospects and great application potential in many fields such as military equipment and aerospace. [0003] Since the a...

Claims

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Application Information

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IPC IPC(8): H01M4/36B22F1/02B22F9/00H01M4/38H01M4/58
CPCY02E60/10
Inventor 王科何向明任建国王莉李建军蒲薇华姜长印万春荣
Owner TSINGHUA UNIV
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