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Carbon/tin oxide/graphene composite material, preparation method and application thereof

A composite material and graphene technology, applied in the field of electrochemistry, can solve problems such as high cost and poor electrochemical performance, and achieve the effects of low cost, improved dispersibility, and shortened reaction sites.

Active Publication Date: 2021-01-08
JILIN UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, current tin oxide composites are costly and have poor electrochemical performance

Method used

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  • Carbon/tin oxide/graphene composite material, preparation method and application thereof
  • Carbon/tin oxide/graphene composite material, preparation method and application thereof
  • Carbon/tin oxide/graphene composite material, preparation method and application thereof

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preparation example Construction

[0030] The preparation method of the carbon / tin oxide / graphene composite material of one embodiment, comprises the following preparation steps:

[0031] Step S110: Under the condition of 160° C. to 180° C., the rice husk is subjected to a hydrothermal reaction in an alkaline solution to obtain a first precipitate.

[0032] Wherein, the alkaline solution is selected from one of sodium hydroxide solution and potassium hydroxide solution. Further, the mass volume ratio of the rice husk to the alkali solution is 1g:15mL˜2g:15mL, and the concentration of the alkali solution is 2moL / L˜4moL / L.

[0033] Further, in the step of performing hydrothermal reaction on the rice husk in the alkali solution, the time of hydrothermal reaction is 12h-36h.

[0034] It should be noted that before the step of subjecting the rice husk to the alkali solution for hydrothermal reaction, a step of washing the rice husk and then drying it is also included. Further, the water used is deionized water; th...

Embodiment 1

[0056] The preparation steps of the carbon / tin oxide / graphene composite material of the present embodiment are as follows:

[0057] 1) Wash the rice husk with deionized water and dry it in an oven at a constant temperature of 60°C. Weigh 12 grams of dried rice husk and immerse it in 180mL sodium hydroxide solution with a concentration of 2moL / L at room temperature, and then transfer to the high pressure reaction The kettle was kept at a constant temperature of 180°C for 12 hours for hydrothermal reaction. After the reaction, the autoclave was cooled at room temperature to obtain the first precipitate;

[0058] 2) Wash the first precipitate with 200mL of 2moL / L hydrochloric acid, and then wash with deionized water until neutral, and finally obtain a carbon skeleton;

[0059] 3) Disperse 1.2 grams of carbon skeleton in 120 mL of deionized water, weigh 0.42 grams of stannous chloride dihydrate and dissolve it in a small amount of ethanol, and pour the dissolved stannous chloride ...

Embodiment 2

[0067] The preparation steps of the carbon / tin oxide / graphene composite material of the present embodiment are as follows:

[0068] 1) Wash the rice husk with deionized water and dry it in an oven at a constant temperature of 60°C. Weigh 12 grams of dried rice husk and immerse it in 180mL potassium hydroxide solution with a concentration of 3moL / L at room temperature, and then transfer to the high pressure reaction The kettle was kept at a constant temperature of 170°C for 24 hours for hydrothermal reaction. After the reaction, the autoclave was cooled at room temperature to obtain the first precipitate;

[0069] 2) Wash the first precipitate with 200mL of 2moL / L hydrochloric acid, and then wash with deionized water until neutral, and finally obtain a carbon skeleton;

[0070] 3) Disperse 1.2 grams of carbon skeleton in 120 mL of deionized water, weigh 0.42 grams of stannous chloride dihydrate and dissolve it in a small amount of ethanol, and pour the dissolved stannous chlori...

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Abstract

The invention relates to a carbon / tin oxide / graphene composite material and a preparation method and application thereof. A preparation method of carbon / tin oxide / graphene composite material comprisesthe following steps of: hydrothermally reacting rice husk in alkaline solution at 160 DEG C to 180 DEG C to obtain a first precipitate; Carrying out acid washing on the first precipitate, and then washing the first precipitate with water to neutrality to obtain a carbon skeleton; hydrothermally reacting the carbon skeleton with tin source and graphene to obtain a second precipitate at 180 DEG C to 200 DEG C; calcining the second precipitate at 500 to 550 degree centigrade in a protective gas atmosphere to obtain carbon / tin oxide / graphene composite. The carbon / tin oxide / graphene composite prepared by the preparation method of the carbon / tin oxide / graphene composite material has the advantages of low cost and good electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a carbon / tin oxide / graphene composite material and a preparation method and application thereof. Background technique [0002] Since the 21st century, the continuous deterioration of the global climate environment and the increasing shortage of oil resources have restricted the development of human society. Therefore, for the sustainable development of human society, we must develop a clean and safe green energy system to replace the traditional energy system that has gradually hindered the development of human society. As a new generation of high-specific-capacity clean chemical power sources, lithium-ion batteries have been widely used due to their advantages such as large capacity, small size, light weight, high operating voltage, long cycle life, small memory effect, and small self-discharge. However, the performance of current lithium-ion batteries has been unable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/362H01M4/483H01M4/62H01M4/628H01M10/0525Y02E60/10
Inventor 张志强薛金申于开锋曹兴刚邹康迪王中书
Owner JILIN UNIV
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