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Tellurium-doped MXene composite material and preparation method and application thereof

A composite material and tellurium source technology, which is applied in the preparation of tellurium-doped MXene composite materials and in the application field of potassium ion batteries, can solve the problems of unsatisfactory performance and achieve improved electrochemical performance, rich active sites, The effect of large lattice distortion

Active Publication Date: 2019-06-14
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure MXene materials are used as anode materials for potassium-ion batteries, and their performance is still not satisfactory.

Method used

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  • Tellurium-doped MXene composite material and preparation method and application thereof
  • Tellurium-doped MXene composite material and preparation method and application thereof
  • Tellurium-doped MXene composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of tellurium-doped MXene composite material, comprising the following steps:

[0034] (1) Take 50mg MXene (Ti 3 C 2 T x ) and 0.5 mg of biphenyl ditellurium were added to ethanol, configured into a 1 mg / ml ethanol dispersion, and magnetically stirred for 1 hour;

[0035] (2) Move the dispersion obtained in step (1) to a reactor with a capacity of 100ml, seal it, place it in an oven, keep it warm at 100°C for 10 hours, and cool to room temperature;

[0036] (3) After the product obtained in step (2) was centrifuged for 5 minutes under the condition of 5000r / min with a centrifuge, it was washed with ultrapure water and absolute ethanol for 3 times and then moved to a vacuum drying oven; the drying temperature was 60°C. Drying time 5 hours;

[0037] (4) Place the product obtained in step (3) in a corundum ark, transfer it to a tube furnace, and under the protection of Ar gas, heat it to 300°C at a heating rate of 5°C / min, keep it warm for 3 hours a...

Embodiment 2

[0041]A preparation method of tellurium-doped MXene composite material, comprising the following steps:

[0042] (1) Take 1000mg MXene (Ti 3 C 2 T x ) and 500 mg of biphenyl ditellurium were added to ethanol, configured into a 50 mg / ml ethanol dispersion, and magnetically stirred for 3 hours;

[0043] (2) Move the dispersion obtained in step (1) to a reactor with a capacity of 50ml, seal it, place it in an oven, keep it warm at 150°C for 15 hours, and cool to room temperature;

[0044] (3) After the product obtained in step (2) was centrifuged for 5 minutes under the condition of 5000r / min with a centrifuge, it was washed with ultrapure water and absolute ethanol for 3 times and then moved to a vacuum drying oven; the drying temperature was 60°C. Drying time 15 hours;

[0045] (4) Place the product obtained in step (3) in a corundum ark, transfer it to a tube furnace, and under the protection of Ar gas, heat it to 300°C at a heating rate of 5°C / min, keep it warm for 3 hour...

Embodiment 3

[0049] A preparation method of tellurium-doped MXene composite material, comprising the following steps:

[0050] (1) Take 2000mg MXene (Ti 3 C 2 T x ) and 2000mg of sodium tellurite were added to ethanol, configured into a 100mg / ml ethanol dispersion, and magnetically stirred for 5 hours;

[0051] (2) Move the dispersion obtained in step (1) to a reactor with a capacity of 50ml, seal it, place it in an oven, keep it warm at 220°C for 24 hours, and cool to room temperature;

[0052] (3) After the product obtained in step (2) was centrifuged for 5 minutes under the condition of 5000r / min with a centrifuge, it was washed with ultrapure water and absolute ethanol for 3 times and then moved to a vacuum drying oven; the drying temperature was 60°C. Drying time 20 hours;

[0053] (4) Place the product obtained in step (3) in a corundum ark, transfer it to a tube furnace, and under the protection of Ar gas, heat it to 300°C at a heating rate of 5°C / min, keep it warm for 3 hours a...

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Abstract

The invention discloses a tellurium-doped MXene composite material and a preparation method thereof. The material comprises the following steps: (1) adding MXene and tellurium source into a dispersantaccording to a mass ratio of 1: 0.01 to 1 to prepare a dispersant with a concentration of 1: 100 mg / ml and stirring for 1-5 hours; (2) heating the dispersant to 100-220 DEG C, performing reaction for10-24 h and cooling to room temperature; (3) centrifuging the product obtained in the step (2), washing with a detergent, and vacuum drying; (4) placing the dried product obtained in the step (3) ina corundum ark, transferring the dried product to a tube furnace, and heating the dried product to 300-500 DEG C under the protection of an inert gas, performing heat preservation for 3-5 h, and cooling to the room temperature to obtain the tellurium-doped MXene composite. The composite material prepared by the invention can be used as the negative electrode of the potassium ion battery, the layerspacing is increased, the ion diffusion channel is optimized, and the electrochemical performance of the potassium ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a preparation method of a tellurium-doped MXene composite material and its application in a potassium ion battery. Background technique [0002] With the continuous improvement of the industrial level, the energy problem has become increasingly prominent. On the one hand, the storage capacity of traditional fossil energy is limited and the energy utilization rate is low. People urgently need new green energy to replace traditional energy. Against this historical background, countries have made great efforts to develop new green energy and compete for the high ground in the field of new energy technology. [0003] Due to its good chemical stability and electrochemical performance, lithium-ion batteries have been the core direction of the field of rechargeable batteries since their birth. However, lithium storage is limited, mining is difficult, and it is difficult t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/054
CPCY02E60/10H01M10/054H01M4/587H01M2004/028
Inventor 张业龙孙宏阳徐晓丹凡雨渲汪达张弛宋伟东陈梅温锦秀郭月曾庆光彭章泉
Owner WUYI UNIV
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