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Aligned carbon nano tube/molybdenum disulfide composite fiber and preparation method and application thereof

A technology of oriented carbon nanotubes and molybdenum disulfide, applied in the field of energy storage devices, can solve the problems of easy agglomeration, small binding force of active materials, poor electrical conductivity, etc.

Inactive Publication Date: 2015-11-11
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain problems in the above method: first, the active material deposited by chemical deposition is easy to be adsorbed on the surface of the CNT fiber, and there is little inside; Incomplete utilization of active material
However, its high capacity is difficult to be effectively utilized due to its poor electrical conductivity
Single-layer or few-layer MoS 2 Nanosheets can provide a large specific surface area, which is very beneficial for energy storage applications, but it is difficult to synthesize

Method used

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  • Aligned carbon nano tube/molybdenum disulfide composite fiber and preparation method and application thereof
  • Aligned carbon nano tube/molybdenum disulfide composite fiber and preparation method and application thereof
  • Aligned carbon nano tube/molybdenum disulfide composite fiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] CNT / MoS 2 Preparation of nanocomposite fibers. Weigh 25 mg of polyvinylpyrrolidone (molecular weight: 40,000), dissolve it in 50 mL of N-dimethylformamide, and stir at high speed for 1 hour. Then 100 mg of ammonium thiomolybdate was added, ultrasonicated for 1 hour and then stirred for 5 hours to obtain a uniform precursor solution. Transfer the precursor solution to a hydrothermal kettle, immerse the aligned carbon nanotube film drawn on a polytetrafluoroethylene plate in the precursor solution, and conduct a hydrothermal reaction at 220°C in a muffle furnace for 5 hours. After cooling to room temperature, the reaction Oriented CNT / MoS after 2 The composite film is rolled into a fiber and dried at 80°C for 12 hours.

[0040] Fabrication of fibrous supercapacitors and lithium-ion batteries. Two aligned CNT / MoS 2 The composite fibers are coated with an electrolyte solution and rolled into a wire-like supercapacitor. The preparation process of the gel electrolyte us...

Embodiment 2

[0042] CNT / MoS 2 Preparation of nanocomposite fibers. Weigh 34.2 mg of polyvinylpyrrolidone (molecular weight: 50,000), dissolve it in 70 mL of N-dimethylformamide, and stir at high speed for 1 hour. Then 137 mg of ammonium thiomolybdate was added, ultrasonically treated for 2 hours and then stirred for 10 hours to obtain a uniform precursor solution. Transfer the precursor solution to a hydrothermal kettle, immerse the aligned carbon nanotube film drawn on a polytetrafluoroethylene plate in the precursor solution, and conduct a hydrothermal reaction at 220°C in a muffle furnace for 6 hours. After cooling to room temperature, the reaction Oriented CNT / MoS after 2 The composite film is rolled into a fiber and dried at 85°C for 12 hours.

[0043] Fabrication of fibrous supercapacitors and lithium-ion batteries. Two aligned CNT / MoS 2 The composite fibers are coated with an electrolyte solution and rolled into a wire-like supercapacitor. The preparation process of the gel el...

Embodiment 3

[0045] CNT / MoS 2 Preparation of nanocomposite fibers. Weigh 50 mg of polyvinylpyrrolidone (molecular weight: 80,000), dissolve it in 100 mL of N-dimethylformamide, and stir at high speed for 1 hour. Then 150 mg of ammonium thiomolybdate was added, ultrasonically treated for 5 hours and then stirred for 12 hours to obtain a uniform precursor solution. Transfer the precursor solution to a hydrothermal kettle, immerse the aligned carbon nanotube film drawn on a polytetrafluoroethylene plate in the precursor solution, and conduct a hydrothermal reaction at 220°C in a muffle furnace for 8 hours. After cooling to room temperature, the reaction Oriented CNT / MoS after 2 The composite film is rolled into a fiber and dried at 90°C for 12 hours.

[0046] Fabrication of fibrous supercapacitors and lithium-ion batteries. Two aligned CNT / MoS 2 The composite fibers are coated with an electrolyte solution and rolled into a wire-like supercapacitor. The preparation process of the gel ele...

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Abstract

The invention belongs to the technical field of an energy storage device, in particular relates to an aligned carbon nano tube / molybdenum disulfide composite fiber and a preparation method and application thereof. The preparation method comprises the following steps of: firstly, obtaining an aligned carbon nano tube thin film from a spinnable carbon nano tube (CNT) array by dry spinning; and secondly, immersing the CNT thin film in a precursor liquid in which (NH4)2MoS4 is taken as a precursor and polyvinyl pyrrolidone is taken as a surfactant for hydrothermal reaction to obtain a CNT / MoS2 composite thin film, and winding the thin film into the composite fiber. The aligned CNT / molybdenum disulfide composite fiber has excellent mechanical performance and electrochemical performance; a flexible fibrous supercapacitor and a lithium ion battery which are prepared from the composite fiber both show higher specific capacity than those of the traditional planar / fibrous device; and meanwhile, the two fibrous energy storage devices have favorable flexibility and stitchability, can be easily woven into fabrics, and show good application prospects in next-generation wearable and portable devices.

Description

technical field [0001] The invention belongs to the technical field of energy storage devices, and in particular relates to a composite fiber based on oriented carbon nanotubes / molybdenum disulfide and its preparation method and application, especially the application in the preparation of supercapacitors and lithium ion batteries. Background technique [0002] The field of wearable electronics is developing rapidly, but its development is limited due to the absence of suitable wearable energy supply systems. Traditional planar and bulk energy storage devices, such as lithium-ion batteries and supercapacitors, cannot effectively meet the requirements of flexibility, integration and wearability [1-10]. Therefore, a series of fibrous supercapacitors [10-14] and Li-ion batteries [15-17] have been developed to solve the above problems. However, the electrochemical performance of fiber-shaped energy storage devices is lower than that of planar ones due to the absence of flexible...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/58H01M10/0525H01G11/36H01G11/30H01G11/86
CPCH01M4/5815H01M4/583Y02E60/10
Inventor 彭慧胜张晔赵阳唐志航
Owner FUDAN UNIV
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