A kind of molybdenum disulfide @ graphdiyne composite material, preparation method and application

A composite material, molybdenum disulfide technology, applied in the field of electrochemical energy storage, can solve the problems of low mass energy density, achieve low cost, small size, and increase the effect of contact area

Active Publication Date: 2022-07-29
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Secondly, the relative atomic mass of sodium ions is greater than that of lithium ions, and the electrode potential of sodium ions is about 300mV higher than that of lithium ions. These factors together lead to a lower mass energy density of sodium-ion batteries than lithium-ion batteries

Method used

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  • A kind of molybdenum disulfide @ graphdiyne composite material, preparation method and application
  • A kind of molybdenum disulfide @ graphdiyne composite material, preparation method and application
  • A kind of molybdenum disulfide @ graphdiyne composite material, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of MoS2@graphdiyne composites:

[0032] (1) Under a nitrogen atmosphere, 100 mg of hexa(trimethylsilyl-ethynyl)benzene (HEB-TMS) and 1 mL of tetra-n-butylammonium fluoride were sequentially added to a reaction flask containing 50 mL of dichloromethane (DCM). Trihydrate (TBAF), stirred at 0 °C for 15 min to obtain a mixture, then the above mixture was washed twice with 50 mL of deionized water, and then dried with anhydrous magnesium sulfate to obtain a hexaethynylbenzene solution.

[0033] (2) dropping the hexaethynylbenzene solution obtained in step (1) into a round bottle containing cobalt acetate and pyridine, wherein the addition ratio of the hexaethynylbenzene solution to cobalt acetate and pyridine is 1 mg / mL: 25 mg: 10 mL, The reaction was carried out at 40°C for 12h. After the reaction was completed, it was washed with pyridine, dimethylformamide, 1M HCl and deionized water in sequence, and dried to obtain graphdiyne (GDY) powder.

[0034] (3) addi...

Embodiment 2

[0036] Preparation of molybdenum disulfide@graphdiyne composites:

[0037] (1) Under a nitrogen atmosphere, 80 mg of hexa(trimethylsilyl-ethynyl)benzene (HEB-TMS) and 1 mL of tetra-n-butylammonium fluoride were sequentially added to a reaction flask containing 40 mL of dichloromethane (DCM). Trihydrate (TBAF), stirred at 4° C. for 30 min to obtain a mixture, then the above mixture was washed twice with 50 mL of deionized water, and then dried with anhydrous magnesium sulfate to obtain a hexaethynylbenzene solution.

[0038](2) dropping the hexaethynylbenzene solution obtained in step (1) into a round bottle containing cobalt acetate and pyridine, wherein the addition ratio of the hexaethynylbenzene solution to cobalt acetate and pyridine is 1 mg / mL: 20 mg: 15 mL, The reaction was carried out at 40°C for 10h. After the reaction was completed, it was washed with pyridine, dimethylformamide, 1M HCl and deionized water in sequence, and dried to obtain graphdiyne (GDY) powder.

...

Embodiment 3

[0041] Preparation of molybdenum disulfide@graphdiyne composites:

[0042] (1) Under a nitrogen atmosphere, 90 mg of hexa(trimethylsilyl-ethynyl)benzene (HEB-TMS) and 1 mL of tetra-n-butylammonium fluoride were sequentially added to a reaction flask containing 60 mL of dichloromethane (DCM). Trihydrate (TBAF), stirred at 0 °C for 20 min to obtain a mixture, then the above mixture was washed twice with 50 mL of deionized water, and then dried with anhydrous magnesium sulfate to obtain a hexaethynylbenzene solution.

[0043] (2) dropping the hexaethynylbenzene solution obtained in step (1) into a round bottle containing cobalt acetate and pyridine, wherein the addition ratio of the hexaethynylbenzene solution to cobalt acetate and pyridine is 1 mg / mL: 20 mg: 10 mL, React at 50°C for 15h. After the reaction was completed, it was washed with pyridine, dimethylformamide, 1M HCl and deionized water in sequence, and dried to obtain graphdiyne (GDY) powder.

[0044] (3) adding the g...

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Abstract

The invention discloses a preparation method of a molybdenum disulfide@graphyne composite material. The graphyne is obtained by mixing a hexaethynylbenzene solution with a cobalt salt and pyridine, and then the graphyne is mixed with a molybdenum source and a sulfur source, and then undergoes a one-step process. The molybdenum disulfide@graphdiyne composite was obtained by solvothermal reaction. The preparation process has the characteristics of simple method, low cost and environmental friendliness. The invention also discloses the molybdenum disulfide@graphdiyne composite material prepared by the above method, which has the advantages of good electrical conductivity and large specific surface area. 2 The nucleation and growth provide a template that avoids MoS 2 reunion. The invention also discloses the application of molybdenum disulfide@graphdiyne composite material in sodium ion battery, the larger interlayer spacing is beneficial to the insertion and extraction of sodium ions without causing larger volume expansion, ensuring that sodium The rate performance and cycling stability of ion batteries have improved the specific capacity of Na-ion batteries.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage, and relates to a molybdenum disulfide@graphdiyne composite material, a preparation method and an application. Background technique [0002] With the rapid development of modern society and economy, human beings have an increasing demand for energy. However, the continuous reduction of traditional energy reserves such as coal, oil, and natural gas and the increasingly serious environmental pollution caused by traditional energy supply systems have greatly restricted the development of society and the further improvement of human life quality. Therefore, seeking new energy, especially non-polluting clean energy, has become a research hotspot for modern researchers. [0003] Like lithium-ion batteries, sodium-ion batteries are also a green energy storage method. However, lithium-ion batteries have problems of low lithium abundance and uneven distribution of resources. About 70% are co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/054
CPCH01M4/5815H01M4/364H01M4/625H01M4/583H01M10/054H01M2004/027Y02E60/10
Inventor 许婧黄克靖胡思波张钰王丽娜李继勇谢星辰
Owner XINYANG NORMAL UNIVERSITY
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