Nanoparticle-filled hollow carbon fiber composite material as well as preparation method and application thereof

A fiber composite material and hollow carbon fiber technology, which is applied in the field of materials, can solve the problems of unreasonable structural design and complicated preparation of porous carbon materials, and achieve the effects of improving electrochemical performance, strong chemical adsorption, and good electrical contact.

Active Publication Date: 2020-05-01
深圳石墨烯创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a hollow carbon fiber composite material filled with nanoparticles and its preparation method and application, so as to solve the problems of unreasonable structural design and complicated preparation of porous carbon materials in the prior art

Method used

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  • Nanoparticle-filled hollow carbon fiber composite material as well as preparation method and application thereof
  • Nanoparticle-filled hollow carbon fiber composite material as well as preparation method and application thereof
  • Nanoparticle-filled hollow carbon fiber composite material as well as preparation method and application thereof

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Embodiment 1

[0026] This embodiment provides a hollow carbon fiber composite material filled with nanoparticles, including hollow carbon fibers and nanoparticles filled in the hollow carbon fibers. The nanoparticles include any one or a combination of two or more of metal oxides, nitrides, and carbon nanoparticles; the diameter of the nanoparticles is less than 200nm.

Embodiment 2

[0028] This embodiment provides a method for preparing a hollow carbon fiber composite material, comprising the following steps:

[0029] Step 1. Two spinning solutions, solution A and solution B, are prepared, the carbonization yield of solution A is greater than that of solution B, and the nanoparticles are dispersed in solution B;

[0030] Step 2, using solution A and solution B dispersed with nanoparticles as shell solution and core solution respectively, and using coaxial electrospinning technology to prepare composite fibers with core-shell structure;

[0031] Step 3: Oxidize and carbonize the composite fiber with a core-shell structure prepared in Step 2 to form a hollow carbon fiber composite material filled with nanoparticles.

[0032] Further, the solvent of solution A and solution B is N,N-dimethylformamide, the mass percentage concentration of solution A is 5%-15%, and the mass percentage concentration of solution B is 8% of the mass percentage concentration of sol...

Embodiment 3

[0038] This embodiment provides an application method of hollow carbon fiber composite material filled with nanoparticles in energy storage, including using the hollow carbon fiber composite material as a sulfur carrier, assembling and testing a lithium-sulfur battery.

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Abstract

The embodiment of the invention discloses a nanoparticle-filled hollow carbon fiber composite material and a preparation method and an application thereof. The nanoparticle-filled hollow carbon fibercomposite material comprises hollow carbon fibers and nanoparticles filled in the hollow carbon fibers. The method is advantaged in that a coaxial electrostatic spinning method is utilized, polyacrylonitrile solution with a high carbon forming rate is used as shell solution, polymer solution with a low carbon yield is used as core solution, and nanoparticles are dispersed in the core solution, a composite fiber with a core-shell structure is formed after coaxial electrostatic spinning, subsequent oxidation carbonization treatment is carried out to obtain the nanoparticle-filled hollow carbon fiber. The method is simple, environment-friendly and high in operability, and the formed hollow carbon fiber composite material can be used as a sulfur positive electrode carrier in a lithium-sulfur battery and shows high capacity and long cycle stability.

Description

technical field [0001] The embodiments of the present invention relate to the field of material technology, and in particular to a hollow carbon fiber composite material filled with nanoparticles, its preparation method and application. Background technique [0002] In the preparation of high-performance lithium-sulfur battery composite cathodes, carbon materials with excellent conductivity play an irreplaceable role in alleviating the intrinsic problems of the system and improving its electrochemical performance. Carbon materials are widely used. Carbon materials of different dimensions, such as carbon spheres, carbon nanotubes, graphene, and graphene foams; carbon materials of different pore structures, such as micropores, mesopores, and mesoporous; , such as amorphous carbon, carbon with different degrees of graphitization; different surface chemical modifications, such as phosphorus doping, nitrogen doping, organic group doping, etc. The hot-melt method is usually used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/62H01M10/052
CPCH01M4/362H01M4/38H01M4/48H01M4/625H01M10/052Y02E60/10
Inventor 秦显营李宝华孙威罗丹
Owner 深圳石墨烯创新中心有限公司
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