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Molybdenum disulfide-carbon three-dimensional porous network composite and preparation method thereof

A molybdenum disulfide, three-dimensional porous technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of poor interface bonding between molybdenum disulfide and graphene, insufficient three-dimensional structure stability, complex preparation process, etc., to achieve interface bonding Good, excellent shape, simple reaction process

Inactive Publication Date: 2015-10-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above synthesis methods all have certain problems, such as poor interfacial bonding between molybdenum disulfide and graphene, insufficient three-dimensional structure stability, complex preparation process, and high energy consumption.

Method used

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  • Molybdenum disulfide-carbon three-dimensional porous network composite and preparation method thereof
  • Molybdenum disulfide-carbon three-dimensional porous network composite and preparation method thereof
  • Molybdenum disulfide-carbon three-dimensional porous network composite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] Take by weighing 3.531g ammonium molybdate, 3.045g thiourea and 8.775g sodium chloride, the mixture is dissolved in the deionized water of 50ml, with the magnetic stirrer of stirring speed 300r / min, stirring and dissolving is made into solution, then again with power Sonicate with a 400W sonicator for 15 minutes and mix well. Put the mixture in the refrigerator for 12 hours to freeze, and then place it in a freeze dryer at -50°C for vacuum drying until the mixture is dried. Grind the mixture and pass through a 150-mesh sieve, take 10g of powder and place it in the ark, put the ark in a tube furnace, pass through the Ar inert gas of 200ml / min to remove the air, then use the Ar inert gas of 200ml / min, and use 10 The heating rate of ℃ / min is raised to 750 ℃, and the temperature is kept for 2 hours for chemical vapor deposition. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain the calcined product A, which is ...

Embodiment 2

[0024] Take by weighing 3.531g ammonium molybdate, 2.736g thiourea and 5.85g sodium chloride, the mixture is dissolved in the deionized water of 50ml, with the magnetic stirrer of stirring speed 300r / min, stirring and dissolving is made into solution, then again with power Sonicate with a 400W sonicator for 15 minutes and mix well. Put the mixture in the refrigerator for 12 hours to freeze, and then place it in a freeze dryer at -50°C for vacuum drying until the mixture is dried. Grind the mixture and pass through a 100-mesh sieve, take 10g of powder and place it in the ark, put the ark into the tube furnace, pass through the Ar inert gas of 200ml / min to remove the air, then use the Ar inert gas of 200ml / min, and use 10 The heating rate of ℃ / min is raised to 750 ℃, and the temperature is kept for 2 hours for chemical vapor deposition. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain the calcined product A, which ...

Embodiment 3

[0026] Take by weighing 3.531g ammonium molybdate, 3.806g thiourea and 13.162g sodium chloride, the mixture is dissolved in the deionized water of 75ml, with the magnetic stirrer of stirring speed 300r / min, stirring and dissolving is made into solution, then again with power Sonicate with a 400W sonicator for 15 minutes and mix well. Put the mixture in the refrigerator for 12 hours to freeze, and then place it in a freeze dryer for vacuum drying at -40°C until the mixture is dried. Grind the mixture and pass through a 150-mesh sieve, take 10g of powder and place it in the ark, put the ark in a tube furnace, pass through the Ar inert gas of 200ml / min to remove the air, then use the Ar inert gas of 200ml / min, and use 10 The heating rate of ℃ / min is raised to 500 ℃, and the temperature is kept for 3 hours for chemical vapor deposition. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain the calcined product A, which is...

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Abstract

The invention discloses a molybdenum disulfide-carbon three-dimensional porous network composite and a preparation method thereof. The composite is prepared by compounding molybdenum disulfide nanosheets and carbon. The preparation method comprises the following steps: with NaCl as a dispersant and template, fully dissolving and mixing NaCl, a molybdenum source and a sulfur source and carrying out freeze drying and porphyrization so as to obtain a mixture; putting the mixture in a tubular furnace and carrying out calcining under the protection of argon so as to obtain a calcined product A; and washing the calcined product A and drying the washed calcined product A so as to obtain the molybdenum disulfide-carbon three-dimensional porous network composite. The invention has the following advantages: preparation process is safe and harmless, operation is simple, and yield is high; and the prepared molybdenum disulfide-carbon three-dimensional porous network composite has good reversible capacity and cycle stability as a cathode material of a lithium ion battery.

Description

technical field [0001] The invention relates to a three-dimensional porous network composite material of molybdenum disulfide and carbon and a preparation method thereof, belonging to the field of electrode materials of lithium ion secondary batteries. Background technique [0002] Due to their unique electrical and physical properties, two-dimensional nanomaterials have attracted increasing research interest, such as graphene and other similar inorganic substances; they are widely used in catalysts, sensors, lithium-ion batteries, etc. . The two-dimensional nanosheet material itself has a large surface energy, and the molecular layers are combined by Van der Waals force. In practical applications, such a two-dimensional sheet structure tends to spontaneously compress and agglomerate to reduce the surface energy of the system and make the sheets more tightly bonded, which is very unfavorable for the application of sheet materials in lithium-ion battery anode materials and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587
CPCY02E60/10
Inventor 何春年周静雯赵乃勤师春生刘恩佐李家俊
Owner TIANJIN UNIV
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