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Preparation method of active carbon fiber porous tungsten disulfide nano composite material

A technology of nanocomposite materials and activated carbon fibers, which is applied in the direction of nanotechnology, hybrid capacitor electrodes, etc., to achieve the effects of reducing agglomeration, good application prospects, and increasing specific surface area

Inactive Publication Date: 2021-05-25
巫国家
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a preparation method of activated carbon fiber porous tungsten disulfide nanocomposite, which solves the problem of carbon fiber and WS 2 The problem of combining to form a new composite material

Method used

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  • Preparation method of active carbon fiber porous tungsten disulfide nano composite material
  • Preparation method of active carbon fiber porous tungsten disulfide nano composite material
  • Preparation method of active carbon fiber porous tungsten disulfide nano composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] S1, preparation of activated carbon fiber: using polyacrylonitrile (PAN) as a precursor, using DMF (N, N-dimethylformamide) as a solvent, preparing a 10% DMF solution of PAN as a spinning solution, and using electrospinning Technology Under the conditions of high voltage 14kV, low pressure -2kV, and spinning distance of 18cm, PAN fiber precursors are prepared, and then the obtained PAN fiber precursors are placed in a tube furnace with air circulation at 260 ° C for 1 hour to complete pre-oxidation;

[0026] S2, adding 1g of preoxidized fiber and 3gKOH obtained in the S1 step, in the tube furnace, N 2 Under the atmosphere, keep warm at 800°C for 1h, and the heating rate is 5°Cmin -1 , to achieve the purpose of carbonization and activation in one step, and obtain activated carbon fiber (ACF);

[0027] S3. Add ammonium tungstate as the tungsten source, thiourea as the sulfur source, and a certain amount of oxalic acid and F127 pore-forming agent into an appropriate amoun...

Embodiment 2

[0030] S1, preparation of activated carbon fiber: using polyacrylonitrile (PAN) as a precursor, using DMF (N, N-dimethylformamide) as a solvent, preparing a 10% DMF solution of PAN as a spinning solution, and using electrospinning Technology Under the conditions of high voltage 14kV, low pressure -2kV, and spinning distance of 18cm, PAN fiber precursors are prepared, and then the obtained PAN fiber precursors are placed in a tube furnace with air circulation at 260 ° C for 1 hour to complete pre-oxidation;

[0031] S2. Add 2g of pre-oxidized fiber and 6gKOH obtained in the step of S1, in a tube furnace, under a helium atmosphere, keep warm at 800°C for 1h, and the heating rate is 5°Cmin -1 , to achieve the purpose of carbonization and activation in one step, and obtain activated carbon fiber (ACF);

[0032] S3. Add ammonium tungstate as the tungsten source, thiourea as the sulfur source, and a certain amount of oxalic acid and F127 pore-forming agent into an appropriate amount...

Embodiment 3

[0035] S1, preparation of activated carbon fiber: using polyacrylonitrile (PAN) as a precursor, using DMF (N, N-dimethylformamide) as a solvent, preparing a 10% DMF solution of PAN as a spinning solution, and using electrospinning Technology Under the conditions of high voltage 14kV, low pressure -2kV, and spinning distance of 18cm, PAN fiber precursors are prepared, and then the obtained PAN fiber precursors are placed in a tube furnace with air circulation at 260 ° C for 1 hour to complete pre-oxidation;

[0036] S2, add the preoxidized fiber and 9gKOH gained in the 3gS1 step, in tube furnace, N 2 Under the atmosphere, keep warm at 800°C for 1h, and the heating rate is 5°Cmin -1 , to achieve the purpose of carbonization and activation in one step, and obtain activated carbon fiber (ACF);

[0037] S3. Add ammonium tungstate as the tungsten source, thiourea as the sulfur source, and a certain amount of oxalic acid and F127 pore-forming agent into an appropriate amount of deio...

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Abstract

The invention discloses a preparation method of an active carbon fiber porous tungsten disulfide nano composite material, which combines an electrostatic spinning technology and a hydrothermal method, and assembles carbon fibers with light weight and good electrical conductivity with WS2 to prepare an active carbon fiber-tungsten disulfide composite material. On this basis, a pore-forming agent F127 is introduced, the specific surface area of the material is further increased, the effective active sites of the electrode active material are improved, and the active carbon fiber-porous tungsten sulfide composite material is prepared. The composite material prepared by the invention has the following advantages that the composite material has higher specific capacity of an electrode material, the introduction of the graphene with lighter mass can promote electron conduction and avoid excessive energy density loss, and the existence of the active carbon fiber reduces the falling of the WS2 nanosheet in the charging and discharging process, and the electrochemical stability of the material is improved.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a preparation method of activated carbon fiber porous tungsten disulfide nanocomposite material. Background technique [0002] Transition metal sulfides exhibit high specific capacity due to their many redox chemical sites, rich structures and valence states, and are therefore being studied as electrode materials for supercapacitors and batteries. The crystal structure of tungsten disulfide is composed of three planar layers S-W-S. In the unit layer, each tungsten W atom is surrounded by six sulfur S atoms, which is in the shape of a triangular prism, making WS 2 It can provide abundant pseudocapacitive reactive sites, which has attracted the attention of many researchers. [0003] But currently the WS 2 Research in the field of supercapacitors is insufficient, and materials composited with carbon fibers are even rarer. Contents of the invention [000...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36B82Y40/00
CPCH01G11/24H01G11/30H01G11/36B82Y40/00
Inventor 巫国家
Owner 巫国家
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