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Lamellar MXene material and preparation method thereof and energy storage material

A technology of lamellar and carbon materials, applied in nanotechnology, chemical instruments and methods, inorganic chemistry, etc. for materials and surface science, can solve the problems of high cost, complex preparation process and equipment, high synthesis temperature, etc., to achieve The effect of low raw material cost, simple process flow and low process cost

Pending Publication Date: 2019-10-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, one of the objects of the present invention is to solve at least one of the existing MXene material synthesis temperature high, complex preparation process and equipment, and high cost

Method used

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  • Lamellar MXene material and preparation method thereof and energy storage material
  • Lamellar MXene material and preparation method thereof and energy storage material
  • Lamellar MXene material and preparation method thereof and energy storage material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0051]Weigh the NaCl-KCl eutectic salt of 20 unit weight (for example, kilogram), and mix with 1.2 unit weight of Ti powder, 0.23 unit weight of Al powder, 0.2 unit weight of nano C powder (average particle diameter 50nm), the mixture placed in a corundum crucible. The above crucible was placed in a stainless steel reactor, sealed and protected by Ar gas. Use a temperature controller to raise the temperature to 900°C at a rate of 5°C / min, keep it at this temperature for 2 hours, then turn off the power and cool down to room temperature with the furnace. The obtained product is taken out, soaked and rinsed with deionized water to remove residual molten salt, and then dried at low temperature to obtain an intermediate product. The obtained intermediate product was etched with hydrofluoric acid to obtain a lamellar MXene material.

[0052] The obtained intermediate product is tested, and its XRD collection of patterns, SEM and TEM photographs are respectively as follows image...

example 2

[0054] Weigh 20 units of LiCl-KCl eutectic salt and mix it with 1.2 units of Ti powder, 0.25 units of Al powder, and 0.2 units of nanoscale acetylene black powder (average particle size 40nm), and place the mixture in a corundum crucible . The above crucible was placed in a stainless steel reactor, sealed and protected by Ar gas. Use a temperature controller to raise the temperature to 850°C at a rate of 8°C / min, and keep it at this temperature for 5 hours to generate Ti with a layered structure. 2 AlC nanopowder. Then, 0.54 unit weight of fluoride was added to the molten salt to 2 The Al atoms in the AlC nanopowder are corroded. Subsequently, the power was turned off and the furnace was cooled to room temperature to obtain a product mixture of solid molten salt and sheet-like MXene nanomaterials. The obtained product was taken out, soaked and rinsed with deionized water to remove residual molten salt, and then dried at low temperature to obtain a sheet-like MXene nanomate...

example 3

[0056] Weigh 40 units of CaCl 2 -NaCl eutectic salt, mixed with 0.8 unit weight of Ti powder, 0.293 unit weight of Al powder, and 0.09 unit weight of nano-scale acetylene black powder (average particle size 40nm), and the mixture is placed in a corundum crucible. The above crucible was placed in a stainless steel reactor, sealed and protected by Ar gas. Use a temperature controller to raise the temperature to 950°C at a rate of 10°C / min, keep it at this temperature for 3 hours, and then turn off the power and cool down to room temperature with the furnace. The obtained product is taken out, soaked and rinsed with deionized water to remove residual molten salt, and then dried at low temperature to obtain an intermediate product. The obtained intermediate product was etched with hydrofluoric acid to obtain sheet-like MXene nanomaterials.

[0057] The obtained intermediate product is tested, and its XRD collection of patterns, SEM and TEM photographs are respectively as follows...

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Abstract

The invention provides a lamellar MXene material preparation method and a battery material thereof. The method includes: directly forming a raw material mixture according to a stoichiometric ratio, wherein a structural formula of a multi-element conductive ceramic material is (M1-xYx)n+1ACn, n is equal to 1, 2 or 3, x is greater than or equal to 0 and less than or equal to 1, M and Y are transition metal elements, A refers to an IIIA or IVA element with an atomic number greater than 13, and C refers to carbon; in an inert atmosphere, subjecting the raw material mixture to reaction in molten salt, and cooling after reaction is finished; removing the molten salt from a product mixture to obtain the multi-element conductive ceramic material; subjecting A atoms in the conductive ceramic material to corrosion to obtain a lamellar MXene material. At least one of problems including high synthesis temperature, complexity in preparation process and equipment, high cost and the like of an existing MXene material can be solved, and the method has advantages of quickness, high efficiency, energy saving, environmental friendliness, low cost, easiness in implementation of large-scale productionand the like.

Description

technical field [0001] The invention relates to the technical field of preparation of conductive ceramic materials, in particular to a method for preparing a sheet-like MXene material with low energy consumption and low cost, and an energy storage material containing the sheet-like MXene material. Background technique [0002] Usually, materials involve a wide range of fields. For example, the industrial and agricultural construction of a country, the construction of national defense, and the improvement of people's living standards are all closely related to materials. Therefore, people regard materials as one of the three pillars of modern civilization. [0003] In recent years, a class of ternary ceramics with a layered structure has attracted the attention of material science researchers at home and abroad due to the excellent properties of both ceramics and metals. This machinable conductive ceramic is a hexagonal close-packed carbide or nitride with obvious anisotropy....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/921C01B32/907C01B32/914C04B35/56C04B35/626C04B35/622H01M4/36H01M4/583H01M4/62B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C04B35/56C04B35/5607C04B35/5618C04B35/5622C04B35/622C04B35/6265C04B35/6267C04B35/6268C04B2235/402C04B2235/404C04B2235/422C04B2235/424C04B2235/425C04B2235/5454C01B32/907C01B32/914C01B32/921H01M4/366H01M4/583H01M4/624Y02E60/10
Inventor 刘会军杨凌旭曾潮流
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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