Multifunctional composite material based on graphene and polymer fibers and preparation method and application thereof

A technology of polymer fibers and composite materials, which is applied in the field of multifunctional composite materials based on graphene and polymer fibers and its preparation and application, can solve the problem of not having dual functions of high thermal conductivity and electromagnetic shielding and excellent mechanical properties, Poor mechanical properties and other problems, to achieve the effects of accelerating sulfur reaction kinetics, inhibiting shuttle, and high specific surface area

Active Publication Date: 2019-10-11
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing patents are only superior in a single function, or are not good in mechanical properties, and cannot have the dual functions of high thermal conductivity and electromagnetic shielding and excellent mechanical properties at the same time.

Method used

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  • Multifunctional composite material based on graphene and polymer fibers and preparation method and application thereof
  • Multifunctional composite material based on graphene and polymer fibers and preparation method and application thereof
  • Multifunctional composite material based on graphene and polymer fibers and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (1) The obtained commercial natural bamboo fiber cloth was cut into a size of 8 × 4 cm, washed with deionized water and dried at 80 °C for later use. The graphene slurry prepared by electrochemical method was ultrasonicated and the concentration was 4 mg mL -1 Graphene aqueous solution, dissolving urea in deionized water to obtain a 40% solution, taking graphene solution and urea solution at a volume ratio of 1:2 to prepare a homogeneous mixture. The washed bamboo fiber cloth was immersed in the mixture to fully absorb the self-assembly, and then freeze-dried to remove water. A three-dimensional network current collector composed of nitrogen-doped core-shell carbon fibers was prepared by processing at 900 °C under an inert atmosphere. figure 1 The SEM picture in the middle is the topography of the three-dimensional current collector, and it can be seen that it has a core-shell fiber structure. (2) A three-dimensional network current collector composed of nitrogen-dope...

Embodiment 2

[0071] (1) The obtained commercial natural bamboo fiber cloth was cut into a size of 8 × 4 cm, washed with deionized water and dried at 80 °C for later use. The graphene slurry prepared by electrochemical method was ultrasonicated and the concentration was 4 mg mL -1 Graphene aqueous solution, dissolving dopamine hydrochloride in deionized water to obtain a 10% solution, taking graphene solution and urea solution with a volume ratio of 1:2 to prepare a uniform mixed solution. The washed bamboo fiber cloth was immersed in the mixture to fully absorb the self-assembly, and then freeze-dried to remove water. A three-dimensional network current collector composed of nitrogen-doped core-shell carbon fibers was prepared by processing at 900 °C under an inert atmosphere. (2) A three-dimensional network current collector composed of nitrogen-doped core-shell carbon fibers is placed in a carbon disulfide solution of elemental sulfur (S 8 / CS 2 ), after evaporating the solvent and tr...

Embodiment 3

[0073] (1) Cut the obtained bacterial cellulose into a size of 10×5 cm and use 0.1 mol L -1The sodium hydroxide solution was cooked at 80 °C for 1 h to remove bacteria and freeze-dried for later use. Ultrasonic the graphene slurry prepared by the electrochemical method and configure the concentration to be 4 mgmL -1 Graphene aqueous solution, dissolving urea in deionized water to obtain a 10% solution, taking graphene solution and urea solution at a volume ratio of 1:2 to prepare a homogeneous mixture. The washed bamboo fiber cloth was immersed in the mixture to fully absorb the self-assembly, and then freeze-dried to remove water. A three-dimensional network current collector composed of nitrogen-doped core-shell carbon fibers was prepared by processing at 900 °C under an inert atmosphere. (2) A three-dimensional network current collector composed of nitrogen-doped core-shell carbon fibers is placed in a carbon disulfide solution of elemental sulfur (S 8 / CS 2 ), after ev...

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Abstract

The invention discloses a multifunctional composite material based on graphene and polymer fibers and a preparation method and application of the multifunctional composite material. A three-dimensional fiber conductive network product with the polarity-rich surface and the core-shell structure is prepared by taking the non-woven fabric as a framework, thereby inhibiting the shuttle effect in the sulfur positive electrode simultaneously, and alleviating the dendritic crystal growth problem of the lithium negative electrode so as to improve the whole performance of the lithium-sulfur battery. The lithium-sulfur battery can be used in the fields of electrocatalysis, microbial fuel cells, polymer electrode membrane electrolysis and metal-air batteries due to the characteristics of high conductivity and high specific surface area so as to provide the advantages. The composite film product is obtained by reinforcing the graphene sheet with the non-woven fabric fiber yarns, has flexibility and remarkable heat conduction, electric conduction and electromagnetic shielding properties, and can ensure safe and long-acting use of related electronic equipment.

Description

technical field [0001] The invention relates to a multifunctional composite material of graphene and polymer fibers and a preparation method thereof, as well as applications in new energy vehicle power battery electrodes, heat dissipation, and electromagnetic shielding. Background technique [0002] In order to ease the pressure on energy and the environment and promote the transformation and upgrading of the automobile industry, China is actively promoting the development of new energy vehicles. As the world's largest new energy vehicle market, it is estimated that by 2025, the scale of automobile production and sales will reach 35 million, of which new energy vehicles will account for more than 20%. The huge development space has created a strong manufacturing demand, and new materials and new technologies are required to provide strong support for the mileage anxiety and safety performance encountered in the development. [0003] Among key components, power batteries wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/96H01M10/052H01M10/058H05K9/00B01J27/051B01J35/10
CPCH01M4/665H01M4/663H01M10/052H01M10/058H01M4/96H05K9/0083B01J27/0515B01J35/0033B01J35/1004Y02E60/50Y02E60/10Y02P70/50
Inventor 王俊中赵政
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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