Tin oxide/alumina doped carbon composite material and preparation method thereof

A carbon composite material, tin dioxide technology, applied in the field of electrochemistry, can solve the problems of poor cycle performance and battery capacity depletion, achieve good stability, excellent rate performance, and prevent damage.

Active Publication Date: 2019-10-15
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a tin dioxide/alumina doped carbon composite material and a preparation method thereof, which solves the serious volume expansion effect existing...

Method used

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  • Tin oxide/alumina doped carbon composite material and preparation method thereof
  • Tin oxide/alumina doped carbon composite material and preparation method thereof
  • Tin oxide/alumina doped carbon composite material and preparation method thereof

Examples

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Embodiment 1

[0034] Add 180ml of absolute ethanol to 220ml of deionized water to make a mixed solution, add 2.4g of urea and 0.95g of potassium stannate trihydrate and stir until completely dissolved. Pour the dissolved solution into a 100ml polytetrafluoroethylene liner, put it into an autoclave for hydrothermal reaction, and keep it at 150°C for 24h. After cooling down to room temperature, the obtained precipitate was centrifuged and washed with deionized water, and dried at 80° C. to obtain a white powder of tin dioxide nanoparticles. Put 0.5g of tin dioxide nanoparticles and 0.03g of alumina into a ball mill jar for intermittent ball milling for 30 minutes, add 0.09g of carbon after 30 hours and continue ball milling for 5 hours to obtain a tin dioxide / alumina doped carbon composite material.

[0035] Example 1 is configured according to the ratio of 8:1:1 and the prepared tin dioxide / alumina doped carbon composite material, acetylene black and binding agent (PVDF) are mixed, and are u...

Embodiment 2

[0040] Add 180ml of absolute ethanol to 220ml of deionized water to make a mixed solution, add 2.4g of urea and 0.95g of potassium stannate trihydrate and stir until completely dissolved. Pour the dissolved solution into a 100ml polytetrafluoroethylene liner, put it into an autoclave for hydrothermal reaction, and keep it at 150°C for 24h. After cooling down to room temperature, the obtained precipitate was centrifuged and washed with deionized water, and dried at 80° C. to obtain a white powder of tin dioxide nanoparticles. Put 0.5g of tin dioxide nanoparticles and 0.028g of alumina into a ball mill jar for intermittent ball milling for 30 minutes, add 0.028g of carbon after 30 hours and continue ball milling for 5 hours to obtain a tin dioxide / alumina doped carbon composite material.

[0041] Example 2 is configured according to the ratio of 7:1.5:1.5 and the prepared tin dioxide / alumina doped carbon composite material, acetylene black and binding agent (PVDF) are mixed, and...

Embodiment 3

[0043] Add 180ml of absolute ethanol to 220ml of deionized water to make a mixed solution, add 2.4g of urea and 0.95g of potassium stannate trihydrate and stir until completely dissolved. Pour the dissolved solution into a 100ml polytetrafluoroethylene liner, put it into an autoclave for hydrothermal reaction, and keep it at 150°C for 24h. After cooling down to room temperature, the obtained precipitate was centrifuged and washed with deionized water, and dried at 80° C. to obtain a white powder of tin dioxide nanoparticles. Put 0.5g of tin dioxide nanoparticles and 0.07g of alumina into a ball mill jar for intermittent ball milling for 30 minutes, add 0.14g of carbon after 30 hours and continue ball milling for 5 hours to obtain a tin dioxide / alumina doped carbon composite material.

[0044] Example 3 is configured according to the ratio of 7:1.5:1.5 and the prepared tin dioxide / alumina doped carbon composite material, acetylene black and binding agent (PVDF) are mixed, and a...

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Abstract

The invention belongs to the technical field of electrochemistry, in particular to a tin oxide/alumina doped carbon composite material and a preparation method thereof. The invention provides a preparation method of a tin dioxide/alumina doped carbon composite material, which comprises the following steps: S1, mixing urea and a tin-containing precursor to complete dissolution to obtain mixed solution; and S2, carrying out hydrothermal reaction on the mixed solution and drying the product to obtain tin dioxide nanoparticles, carrying out dry grinding, and adding carbon for ball milling to obtain a tin dioxide/alumina doped carbon composite material. The invention also provides a tin dioxide/alumina doped carbon composite material prepared by the method. The invention provides the tin dioxide/alumina doped carbon composite material and the preparation method thereof, which solve the problem that the existing lithium-ion battery anode material causes quick capacity depletion and poor cycle performance of batteries due to serious volume expansion effect.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a tin dioxide / alumina doped carbon composite material and a preparation method thereof. Background technique [0002] With the rapid development of society today, energy crisis and environmental issues have become the focus of many researchers, and people are paying more and more attention to finding a new type of environmentally friendly energy storage device. As a typical representative of a new type of energy, lithium-ion batteries have very obvious advantages. Lithium-ion batteries have become the mainstream development direction of secondary batteries due to their excellent performance. Anode materials play a vital role in improving the performance of lithium-ion batteries. Due to its high energy density, fast charging and discharging performance, good cycle life, reliable safety and other characteristics, lithium-ion batteries have shown good applicati...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/48H01M10/0525
CPCH01M4/483H01M4/625H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 黄细平何苗冯叶锋黄仕华熊德平
Owner GUANGDONG UNIV OF TECH
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