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Carbon composite material and preparation method therefor

A technology of carbon composite materials and compounds, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve unsatisfactory problems and achieve the effect of complete coating, high product quality and uniform coating

Inactive Publication Date: 2015-08-19
廖楚宏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to overcome the unsatisfactory technical problems of the existing methods for preparing carbon composite materials, the present invention provides a carbon composite material capable of preparing uniform coating layer, smooth surface, complete coating, perfect shape and improving the cycle performance of batteries simple and easy-to-implement method

Method used

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  • Carbon composite material and preparation method therefor
  • Carbon composite material and preparation method therefor
  • Carbon composite material and preparation method therefor

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preparation example Construction

[0025] The invention provides a method for preparing a carbon composite material. The steps include: A. oxidizing graphite to obtain surface oxide graphite; B. mixing sugar compounds, surface oxide graphite and a solvent to obtain a mixture; C. mixing the mixture Treat at 100°C-250°C for 1-10 hours to obtain the precursor; D. Calcinate the precursor under air at 300-1600°C for 1-10 hours to obtain the carbon composite material. The prepared carbon composite material has uniform coating layer, smooth surface, complete coating, perfect shape, especially excellent electrochemical performance of the material, and the method is simple to operate and easy to realize.

[0026] Wherein, the graphite in step A can be pretreated graphite, and the pretreatment is various pretreatments known to those skilled in the art, for example, graphite can be dried, for example, graphite powder is placed in an oven at 80 ° C Bake for 8-72 hours to remove excess moisture in the graphite powder. Wher...

Embodiment 1

[0046] Dry 20g of graphite powder at 90°C for 24 hours to obtain dry graphite powder, take 10g of dry graphite powder and place it in a muffle furnace, keep the temperature at 350°C for 5 hours, take it out for later use after cooling to normal temperature, and obtain a gas phase Graphite oxide surface. The atomic percentage of oxygen is 6.97%, and the weight percentage of oxygen is 9.08% (obtained by the S-3400N scanning electron microscope test of Hitachi, Japan, such as figure 2 shown).

[0047] Stir 20g of glucose with 100mL of water at room temperature for 12 hours to form a uniform glucose solution, then add 7.5g of the surface graphite oxide powder prepared above, and use a planetary ball mill to grind the sample with a ball-to-material ratio of 15:1 and a speed of 400rad / min , ball milled for 10 h, and after discharge, treated in an oven at 220°C for 3 h to obtain a thermally oxidized precursor. The thermally oxidized precursor was placed in a porcelain boat, calcin...

Embodiment 2

[0052] Dry 20g of graphite powder at 90°C for 24 hours to obtain dry graphite powder, put 10g of graphite powder in a beaker, add 50mL of 30% hydrogen peroxide, stir at 80°C until completely dry, take it out Place in a vacuum oven and dry at 80° C. for 6 hours to obtain graphite oxide on the surface of the liquid phase.

[0053] Stir 20g of glucose with 100mL of water at room temperature for 12 hours to form a uniform glucose solution, then add 7.5g of the surface graphite oxide powder prepared above, and use a planetary ball mill to grind the sample with a ball-to-material ratio of 15:1 and a speed of 400rad / min , ball milled for 10 h, and after discharge, treated in an oven at 220°C for 3 h to obtain a thermally oxidized precursor. The thermally oxidized precursor was placed in a porcelain boat, calcined in an air atmosphere at a gas flow rate of 250ml / min, selected at a temperature of 350°C, and held for 6 h, and then cooled to room temperature to obtain a carbon composite ...

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Abstract

The invention provides a carbon composite material and a preparation method therefor. The preparation method comprises a first step of performing oxidation treatment on graphite so as to obtain surface oxidized graphite; a second step of mixing carbohydrate, the surface oxidized graphite and a solvent so as to obtain a mixture; a third step of treating the mixture for 1-10 hours at 100-250DEG C so as to obtain a precursor; and a fourth step of calcining the precursor for 1-10 hours at 300-1600DEG C in the air so as to obtain the carbon composite material. The prepared carbon composite material has a uniform wrapping layer and a smooth surface, is wrapped completely, has a perfect appearance, and particularly has excellent electrochemical performance. The method is simple to operate and is easy to realize.

Description

technical field [0001] The invention relates to a method for preparing a carbon composite material and the prepared carbon composite material. Background technique [0002] The development of human beings is always accompanied by the innovation of various new technologies and the application of new energy sources. For example, the first industrial revolution was accompanied by the popularization of steam engines; the second industrial revolution was the application of electricity. In today's society, fossil fuels such as oil, natural gas, and coal have been widely used for more than two hundred years, followed by rising prices of fossil fuels and energy crises. In addition, various fossil fuels are non-renewable energy sources, and their reserves are extremely limited. And while burning fossil energy, it also emits various toxic gases and dust into the atmosphere, causing acid rain, smog, greenhouse effect, etc., which have seriously affected people's life and health. In a...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/587H01M10/0525
CPCH01M4/366H01M4/587H01M10/0525Y02E60/10
Inventor 廖楚宏胡超
Owner 廖楚宏
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