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Molybdenum disulfide/graphene/carbon composite material and application thereof

A carbon composite material, molybdenum disulfide technology, applied in the field of molybdenum disulfide/graphene/carbon composite material, can solve the problems of single pore structure, complex preparation process, single pore structure and the like

Active Publication Date: 2019-11-26
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese patent 201510245973.6 provides a three-dimensional macroporous graphene-carbon nanotube-molybdenum disulfide composite material, which is obtained by pretreatment and chemical vapor deposition of metal foam with a pore size of 0.1mm to 5mm to obtain a three-dimensional macroporous graphene / metal foam composite, then place the three-dimensional macroporous graphene / foamed metal composite in an aqueous solution of nickel nitrate and cobalt chloride, dry, and chemical vapor deposition to obtain a three-dimensional macroporous graphene / carbon nanotube / foamed metal composite. The three-dimensional macroporous graphene / carbon nanotube / metal foam composite is immersed in the etching solution to obtain the three-dimensional macroporous graphene / carbon nanotube, and the disulfide is loaded on the three-dimensional macroporous graphene / carbon nanotube by hydrothermal method molybdenum, to obtain three-dimensional macroporous graphene / carbon nanotubes loaded with molybdenum disulfide, and finally anneal the three-dimensional macroporous graphene / carbon nanotubes loaded with molybdenum disulfide to obtain three-dimensional macroporous graphene-carbon nanotube-disulfide Molybdenum composite material; as a negative electrode active material for lithium-ion batteries, it has the advantages of high capacity and good stability, but its pore structure is single and the preparation process is complicated
[0007] The existing graphene / molybdenum disulfide-like carbon composites have a single pore structure, and most of them simply use the pore structure characteristics of graphene. The internal pore structure is lacking, and the pore structure of the composite material cannot be adjusted, which severely limits the development of porous carbon materials. The application surface and application effect

Method used

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  • Molybdenum disulfide/graphene/carbon composite material and application thereof
  • Molybdenum disulfide/graphene/carbon composite material and application thereof
  • Molybdenum disulfide/graphene/carbon composite material and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Weigh 0.6g of polyacrylonitrile, 0.5g of polyvinylpyrrolidone, 0.3g of ammonium tetrathiomolybdate and 0.05g of graphene, stir and dissolve in 12g of DMF, use 400-mesh stainless steel mesh to filter and set aside; take an appropriate amount of solution for electrospinning , the electrospinning parameters are spinning voltage of 20kV, propulsion rate of 0.015mL / min, spinning receiving distance of 18cm, syringe needle of 8#, spinning at room temperature for 4h to obtain a composite fiber membrane; the above composite fiber membrane into a tube furnace at N 2 / H 2 (Volume ratio: 9 / 1) In a mixed atmosphere, raise the temperature to 400°C at a heating rate of 2°C / min, maintain it for 4h, then cool down to room temperature, take it out; prepare KOH saturated solution, and process the composite fiber membrane / KOH as above The mass ratio is 1:5 for impregnation treatment, put the composite fiber membrane after the above treatment into KOH saturated solution in proportion, ultr...

Embodiment 2

[0038] Weigh 1.5g of polyacrylonitrile, 1.0g of polyvinylpyrrolidone, 0.8g of ammonium tetrathiomolybdate and 0.2g of graphene, stir and dissolve in 16g of DMF, use 400 mesh stainless steel mesh to filter and set aside; take an appropriate amount of solution for electrospinning , the electrospinning parameters are spinning voltage of 20kV, propulsion rate of 0.015mL / min, spinning receiving distance of 18cm, syringe needle of 8#, spinning at room temperature for 2h to obtain a composite fiber membrane; the above composite fiber membrane into a tube furnace at N 2 / H 2 (Volume ratio: 9 / 1) In a mixed atmosphere, raise the temperature to 450°C at a heating rate of 6°C / min, maintain it for 1h, then cool down to room temperature, take it out; prepare KOH saturated solution, and process the composite fiber membrane / KOH as above The mass ratio is 1:0.5 for impregnation treatment, put the composite fiber membrane after the above treatment into KOH saturated solution in proportion, ult...

Embodiment 3

[0041] Weigh 1.0g of polyacrylonitrile, 1.2g of polyvinylpyrrolidone, 1.0g of ammonium tetrathiomolybdate and 0.1g of graphene, stir and dissolve in 10g of DMF, use 400 mesh stainless steel mesh to filter and set aside; take an appropriate amount of solution for electrospinning , the electrospinning parameters are spinning voltage of 20kV, propulsion rate of 0.015mL / min, spinning receiving distance of 18cm, syringe needle of 8#, spinning at room temperature for 10h to obtain a composite fiber membrane; the above composite fiber membrane into a tube furnace at N 2 / H 2 (Volume ratio: 9 / 1) In a mixed atmosphere, raise the temperature to 380°C at a heating rate of 4°C / min, maintain it for 6h, then cool down to room temperature, take it out; prepare KOH saturated solution, and process the composite fiber membrane / KOH as above The mass ratio is 1:10 for impregnation treatment, the composite fiber membrane after the above treatment is put into the KOH saturated solution in proporti...

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Abstract

The invention belongs to the technical field of carbon composite materials, and discloses a molybdenum disulfide / graphene / carbon composite material with hierarchical pore structures. The molybdenum disulfide / graphene / carbon composite material is formed by composite nanofibers with the diameter of 60-500 nm, and the composite nanofibers comprise 3%-35% of molybdenum disulfide, 0.2%-10% of grapheneand 60%-95% of carbon in percentage by mass; the composite nanofibers are provided with the hierarchical pore structures axially, the pore sizes are continuously distributed between 0.1 nm to 5 microns, the average pore size ranges from 1.5 nm to 25 nm, and the hierarchical pore structures comprise 25%-60% of microporous structures and 40%-75% of microporous structures by pore volume, and the microporous structures are distributed on the surface of the nanofibers and the pore walls of the mesoporous structures; and the composite material has the advantages of being high in specific surface area, developed in pore structure, controllable in pore size and structure, wide in application and the like.

Description

technical field [0001] The invention belongs to the field of carbon composite materials, in particular to a molybdenum disulfide / graphene / carbon composite material with a hierarchical pore structure and an application thereof. Background technique [0002] Porous carbon materials have been widely used in catalyst supports, supercapacitors, catalysts, adsorbents, and gas storage due to their high specific surface area, high porosity, good electrical and thermal conductivity, and tunable pore size and surface properties. Since the discovery of single-layer graphene in 2004, all kinds of two-dimensional materials represented by it have rich and diverse physical and chemical properties, and have shown broad potential in the fields of electronic devices, optoelectronic devices, catalysis, energy and the environment. The application prospect has attracted extensive attention of researchers. Monolayer molybdenum disulfide is a transition metal layered compound with a structure sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M10/0525C25B1/04H01G11/24H01G11/30H01G11/32H01G11/36
CPCH01M4/364H01M4/5815H01M4/587H01M10/0525C25B1/04H01G11/30H01G11/32H01G11/36H01G11/24H01M2004/027Y02E60/36D01F6/54D01F6/56D01F1/10D01D1/02D01D5/0038D01D5/247D01D10/02D01F9/21D01D5/0007D01F9/22D10B2101/12Y10T428/2918Y10T428/298
Inventor 段雅静杜辉付慧陈照军付金喆
Owner QINGDAO UNIV