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Preparation method of molybdenum disulfide/titanium carbide composite material

A composite material, molybdenum disulfide technology, applied in the field of materials, can solve the problems of insignificant improvement in electrochemical performance, high reaction temperature, and few active sites, and achieve excellent electrochemical performance, mild reaction conditions, and repeatability. high effect

Inactive Publication Date: 2018-11-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a high reaction temperature, requires a tube furnace or CVD equipment, and the prepared molybdenum disulfide has a granular shape and fewer active sites, which does not significantly improve the electrochemical performance.

Method used

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  • Preparation method of molybdenum disulfide/titanium carbide composite material
  • Preparation method of molybdenum disulfide/titanium carbide composite material
  • Preparation method of molybdenum disulfide/titanium carbide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 0.6 grams of sodium molybdate, 1 gram of thiourea, 0.33 grams of titanium carbide, and 45 mL of deionized water into a stainless steel reactor with a volume of 75 ml, stir for 30 minutes, seal it, and fill it with 60%; Put it in a crucible boiler, heat it at 200°C for 24 hours, then wait for the reaction kettle to cool down to room temperature naturally, and take out the mixture. The above mixture was successively washed 6 times with absolute ethanol, dilute hydrochloric acid and distilled water, filtered, and then vacuum-dried at 60°C for 12 hours to obtain a molybdenum disulfide / titanium carbide composite material with excellent electrochemical properties.

[0024] Such as figure 1 As shown, it can be clearly seen that the petal-shaped molybdenum disulfide and titanium carbide are composited together.

[0025] Such as figure 2 As shown, it can be seen that the composite of molybdenum disulfide and titanium carbide is relatively uniform.

[0026] Such as imag...

Embodiment 2

[0028] Add 0.6 gram of sodium molybdate, 1 gram of thioacetamide, 0.33 gram of titanium carbide, and 45 mL of deionized water into a stainless steel reactor with a volume of 75 ml, stir for 30 minutes, seal it, and fill it with 60%; Place it in a crucible boiler, heat it at 200°C for 16 hours, then wait for the reaction kettle to cool down to room temperature naturally, and take out the mixture. The above mixture was washed three times successively with absolute ethanol, dilute hydrochloric acid and distilled water, filtered, and then vacuum-dried at 60°C for 12 hours to obtain a molybdenum disulfide / titanium carbide composite material with excellent electrochemical properties.

[0029] Such as Figure 4 As shown, it can be seen that the rate performance of the molybdenum disulfide / titanium carbide composite is relatively excellent.

Embodiment 3

[0031] Add 0.6 gram of ammonium molybdate, 1 gram of thiourea, 0.33 gram of titanium carbide, and 45 mL of deionized water into a stainless steel reaction kettle with a volume of 75 ml, stir for 10 minutes, seal, and the filling volume is 60%; In a crucible boiler, heat at 180° C. for 20 hours, then allow the reaction kettle to cool down to room temperature naturally, and take out the mixture. The above mixture was washed 5 times with absolute ethanol, dilute hydrochloric acid and distilled water successively, filtered, and then vacuum-dried at 60°C for 12 hours to obtain a molybdenum disulfide / titanium carbide composite material with excellent electrochemical properties.

[0032] Such as Figure 5 As shown, it can be seen that the rate performance of the molybdenum disulfide / titanium carbide composite is relatively excellent.

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Abstract

The invention discloses a preparation method of a molybdenum disulfide / titanium carbide composite material. The preparation method mainly comprises the following steps: adding a molybdenum source, a sulfur source and titanium carbide into a stainless steel reaction kettle in sequence according to a certain mass ratio, then stirring the molybdenum source, the sulfur source and the titanium carbidefor 10 to 30 min according to a filling volume of 60 percent, putting the mixture into the stainless steel reaction kettle, sealing the reaction kettle, placing the reaction kettle into a crucible furnace, heating the crucible furnace at 180 to 220 DEG C for 16 to 24 h, naturally cooling the reaction kettle to room temperature, and taking out the mixture; and washing the mixture with anhydrous ethanol, diluted hydrochloric acid and distilled water in sequence for three to six times, filtering the mixture, putting the obtained powder into a vacuum drying oven for vacuum drying at 60 DEG C for 12 h. According to the preparation method disclosed by the invention, the process is simple, and reaction conditions are mild; no surfactant is added; the repetitiveness is high, and the cost is low; the prepared molybdenum disulfide / titanium carbide composite material is excellent in electrochemical performance and excellent in rate performance and high in cycle stability and has important significance in the field of lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a method for preparing a molybdenum disulfide / titanium carbide composite material. Background technique [0002] With the rapid development of science and technology and the increasingly serious environmental pollution, portable electronic devices and electric vehicles have received more and more attention. Lithium-ion batteries (Lithium-Ion Batteries, LIBs) are widely used in portable vehicles and electronic devices because of their large capacity and high power. Two-dimensional materials (such as graphene, nitrides, transition metal sulfides, etc.) are widely used as electrode materials for lithium-ion batteries because of their unique physical and chemical properties. In recent years, a new class of materials, MXene, has joined the ranks of 2D materials. [0003] MXene is a new type of carbon / nitride two-dimensional nano-layered material, which is generally obtained by sel...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 高发明栾孙锐
Owner YANSHAN UNIV
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