Three-dimensional porous quasi-graphene loaded molybdenum disulfide composite and preparation method thereof

A three-dimensional porous, molybdenum disulfide technology, applied in electrical components, battery electrodes, circuits, etc., can solve the serious agglomeration of molybdenum disulfide and redox graphene, poor electrical and thermal conductivity and mechanical properties, and many graphene structural defects, etc. problem, to achieve the effect of excellent morphology, low cost and good dispersion

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 common problems of the existing methods for preparing molybdenum disulfide / graphene composites are: on the one hand, the graphene used is redox graphene, which has many structural defects, poor electrical and thermal conductivity and mechanical properties; The poor interfacial bonding between graphene and molybdenum disulfide, serious agglomeration of molybdenum disulfide and redox graphene, and thick molybdenum disulfide sheets lead to long cycle life and rate performance of molybdenum disulfide / graphene composites. Further improve

Method used

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  • Three-dimensional porous quasi-graphene loaded molybdenum disulfide composite and preparation method thereof
  • Three-dimensional porous quasi-graphene loaded molybdenum disulfide composite and preparation method thereof
  • Three-dimensional porous quasi-graphene loaded molybdenum disulfide composite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Take by weighing 1.401g citric acid, 0.3532g ammonium molybdate, 0.3654g thiourea and 17.55g sodium chloride, be dissolved in the deionized water of 75ml after mixing it, with the magnetic stirrer of stirring speed 300r / min, stir and dissolve into a solution, and then ultrasonicated with a power of 400W for 15 minutes, and mixed evenly. 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 200ml / min of Ar inert gas to remove the air, then pass into 200ml / min of Ar inert gas, and Raise the temperature to 750°C at a heating rate of 10°C / min, keep it warm for 2 hours for carbonization reaction, and cool to room temperature under the protection of Ar atmosphere after the reaction to obtain the calcined product A, collect it, grind it finely...

Embodiment 2

[0028] Take by weighing 1.401g citric acid, 0.1766g ammonium molybdate, 0.4804g sodium sulfide and 17.55g sodium chloride, mix it and be dissolved in 75ml of deionized water, with a magnetic stirrer at a stirring speed of 300r / min, stirring and dissolving into a solution, and then ultrasonicated with a power of 400W for 15 minutes, and mixed evenly. 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 carbonization reaction is carried out for 2 hours. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain the calcined product A, wh...

Embodiment 3

[0030] Take by weighing 2.648g citric acid, 0.3531g ammonium molybdate, 0.3349g thiourea and 35.1g sodium chloride, be dissolved in the deionized water of 150ml after mixing it, with the magnetic stirrer of stirring speed 300r / min, stirring and dissolving into a solution, and then ultrasonicated with a power of 400W for 15 minutes, and mixed evenly. 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 carbonization reaction is carried out for 3 hours. After the reaction is completed, it is cooled to room temperature under the protection of Ar atmosphere to obtain the calcined product A, whic...

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Abstract

The invention discloses a three-dimensional porous quasi-graphene loaded molybdenum disulfide composite and a preparation method thereof. The composite is prepared by uniformly loading large-area ultrathin molybdenum disulfide nanosheets onto the surface of three-dimensional porous quasi-graphene network. 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 three-dimensional porous quasi-graphene loaded molybdenum disulfide composite. The invention has the following advantages: preparation process is safe and harmless, operation is simple, and yield is high; and the prepared three-dimensional porous quasi-graphene loaded molybdenum disulfide composite has good reversible capacity, cycle stability and rate capability as a cathode material of a lithium ion battery.

Description

Technical field [0001] The present invention involves a three -dimensional multi -hole graphene load load mo -molybdenum composite material and preparation method, which belongs to the field of lithium ion secondary battery electrode materials. Background technique [0002] Today, the world economy has developed rapidly, and the traditional "rough" development has led to serious lack of resources and environmental pollution in the earth. Traditional unable to renewable energy such as coal, petroleum, natural gas, etc.The concentration of pollutants is seriously exceeded. People urgently need to develop a clean and efficient energy source to replace existing unable renewable resources. As a new chemical energy source, lithium -ion batteries are low in cost, high working voltage, higher energy than energy, and higher than energy.The advantages of low self -discharge rate, high conversion efficiency, long circular life, and environmental friendliness have been widely studied by peop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/136H01M4/1393H01M4/1397
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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