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A kind of preparation method of high-performance lithium-ion battery negative electrode material

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of complex equipment, difficult industrial production, and long preparation time, and achieve short charging time, high capacity, and good cycle performance. Effect

Inactive Publication Date: 2017-05-17
HUIZHOU LONGWAYCAP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation of graphene and TiO 2 There are many defects in the prior art of composite materials, such as complex equipment, long preparation time, and difficulty in industrial production, etc.

Method used

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  • A kind of preparation method of high-performance lithium-ion battery negative electrode material
  • A kind of preparation method of high-performance lithium-ion battery negative electrode material
  • A kind of preparation method of high-performance lithium-ion battery negative electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Adopt the Hummers method to prepare the graphite powder raw material into graphite oxide, weigh 3 g of the graphite powder raw material and add it to an appropriate amount of concentrated sulfuric acid solution, then add 1 g of sodium nitrate and 4 g of potassium permanganate, control the reaction temperature to rise to 40 ° C for 15 min, filter, Washing the solution to obtain graphite oxide, dispersing the prepared graphite oxide in an aqueous solution to obtain a suspoemulsion of graphite oxide, ultrasonically dispersing the obtained suspoemulsion, heating, washing, and drying to prepare a graphene oxide material, and weighing the graphite oxide Mix 2 g of ethylene material with 200 g of tetrabutyl titanate to form a mixture, the mixture is dispersed in an appropriate amount of ethylene glycol solution and stirred to form a mixture solution, and the mixture solution is stirred evenly and then placed in a vacuum drying oven at 50°C. Evaporate the solvent to obtain the p...

Embodiment 2

[0027] Adopt the Hummers method to prepare the graphite powder raw material into graphite oxide, weigh 3 g of the graphite powder raw material and add it to an appropriate amount of concentrated sulfuric acid solution, then add 1 g of sodium nitrate and 4 g of potassium permanganate, control the reaction temperature to rise to 40 ° C for 15 min, filter, Washing the solution to obtain graphite oxide, dispersing the prepared graphite oxide in an aqueous solution to obtain a suspoemulsion of graphite oxide, ultrasonically dispersing the obtained suspoemulsion, heating, washing, and drying to prepare a graphene oxide material, and weighing the graphite oxide Mix 2 g of ethylene material with 200 g of tetrabutyl titanate to form a mixture, the mixture is dispersed in an appropriate amount of ethylene glycol solution and stirred to form a mixture solution, and the mixture solution is stirred evenly and then placed in a vacuum drying oven at 50°C. Evaporate the solvent to obtain the p...

Embodiment 3

[0030]Adopt the Hummers method to prepare the graphite powder raw material into graphite oxide, weigh 3 g of the graphite powder raw material and add it to an appropriate amount of concentrated sulfuric acid solution, then add 1 g of sodium nitrate and 4 g of potassium permanganate, control the reaction temperature to rise to 40 ° C for 15 min, filter, Washing the solution to obtain graphite oxide, dispersing the prepared graphite oxide in an aqueous solution to obtain a suspoemulsion of graphite oxide, ultrasonically dispersing the obtained suspoemulsion, heating, washing, and drying to prepare a graphene oxide material, and weighing the graphite oxide Mix 2 g of ethylene material with 200 g of tetrabutyl titanate to form a mixture, the mixture is dispersed in an appropriate amount of ethylene glycol solution and stirred to form a mixture solution, and the mixture solution is stirred evenly and then placed in a vacuum drying oven at 50°C. Evaporate the solvent to obtain the pr...

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Abstract

The invention provides a preparation method of a high-performance lithium ion battery negative electrode material. The preparation method comprises the following steps: by using graphite powder as a raw material, the graphite powder is prepared into graphite oxide by adopting a Hummers method; the prepared graphite oxide is prepared into a graphene oxide material; the graphene oxide material and a titanium source are mixed according to different mass ratios to form a mixture; the mixture is prepared into precursor powder; the precursor powder is fed into a stainless steel mold and is pressed into a cylindrical raw blank by a cold pressing machine; and the cylindrical raw blank is put into a vacuum cavity of thermal isostatic pressing equipment to prepare a graphene-TiO2 nano-tube-structured composite material. Compared with a traditional technological process, the method has the characteristics of high efficiency, rapid speed and energy conservation; and the lithium ion battery negative electrode material synthesized by the synthesizing method has the advantages of high capacity, good circulating performance, short charging time and the like.

Description

technical field [0001] The invention relates to a preparation method of a lithium battery negative electrode material, in particular to a preparation method of a high-performance lithium ion battery negative electrode material. Background technique [0002] Graphene is made of sp 2 The periodic honeycomb two-dimensional carbonaceous new material formed by hybridized carbon atoms arranged in hexagons, due to its ultra-thin thickness and large specific surface area (theoretical specific surface area is as high as 2630m 2 / g), good thermal conductivity (3000W / (m K)), extremely high electrical conductivity (high-speed electron mobility at room temperature is about 15000cm2 / (V s)) and other special properties make it widely used in electronic technology, Energy storage and other fields have been widely used. [0003] At the same time, TiO 2 As another new type of inorganic functional material, it has also been widely used in many fields such as photocatalytic degradation of po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/139H01M4/1391H01M4/1393
CPCH01M4/139H01M4/1391H01M4/1393H01M4/485Y02E60/10
Inventor 徐茂龙黄红如
Owner HUIZHOU LONGWAYCAP TECH