One-dimensional porous carbon fiber containing sulfide nano particles as well as preparation method and application of one-dimensional porous carbon fiber

A technology of porous carbon fibers and nanoparticles, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problem of low capacity of carbon materials, achieve good conductivity, short ion transmission distance, and facilitate infiltration

Inactive Publication Date: 2019-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the capacity of carbon materials is still low, which meets the requirements of high capacity, large rate and long life. Therefore, it is of great significance to find a scientific and effective strategy to develop high-performance carbon-based potassium-ion batteries.

Method used

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  • One-dimensional porous carbon fiber containing sulfide nano particles as well as preparation method and application of one-dimensional porous carbon fiber
  • One-dimensional porous carbon fiber containing sulfide nano particles as well as preparation method and application of one-dimensional porous carbon fiber
  • One-dimensional porous carbon fiber containing sulfide nano particles as well as preparation method and application of one-dimensional porous carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Add 0.9 g of polyacrylonitrile, 0.1 g of polymethyl methacrylate, and 0.2 g of tin tetrachloride into 9 ml of chloroform, and ultrasonically stir in a water bath for 10 hours to obtain a fully dispersed spinning precursor slurry.

[0033] (2) After removing air bubbles from the slurry, electrospinning is performed at 15KV and a feed rate of 0.05ml / min to obtain a polymer nanofiber film.

[0034] (3) Pre-oxidize the polymer nanofilm at 250°C in an air atmosphere, heat up at a rate of 3°C / min, keep it warm for 2 hours, and then carbonize and vulcanize it under a 1wt.% hydrogen sulfide atmosphere (argon carrier). The temperature is 600°C, the heating rate is 4°C / min, and the holding time is 2 hours. One-dimensional porous carbon fibers containing sulfide nanoparticles were obtained after cooling.

[0035] (4) Get 0.2g of the one-dimensional porous carbon fiber containing sulfide nanoparticles prepared in this embodiment, 0.025g polyvinylidene fluoride (PVDF), 0.025 co...

Embodiment 2

[0037] (1) Add 0.9 g of polyvinyl alcohol, 0.1 g of polymethyl methacrylate, and 0.3 g of stannous chloride to 8 ml of chloroform, and ultrasonically stir in a water bath for 10 hours to obtain a fully dispersed spinning precursor slurry.

[0038] (2) After removing air bubbles from the slurry, electrospinning is performed at 15KV and a feed rate of 0.05ml / min to obtain a polymer nanofiber film.

[0039] (3) Pre-oxidize the polymer nanofilm at 250°C in air atmosphere, heat up at a rate of 3°C / min, keep it warm for 2 hours, and then carbonize and vulcanize it under a 10wt.% hydrogen sulfide atmosphere (argon carrier). The temperature is 600°C, the heating rate is 4°C / min, and the holding time is 2 hours. One-dimensional porous carbon fibers containing sulfide nanoparticles were obtained after cooling.

[0040] (4) Get 0.2g of the one-dimensional porous carbon fiber containing sulfide nanoparticles prepared in this embodiment, 0.025g polyvinylidene fluoride (PVDF), 0.025 conduc...

Embodiment 3

[0042] (1) Add 0.9g polylactic acid, 0.2g polymethyl methacrylate, and 0.4g antimony trichloride to 8 ml of N,N-dimethylformamide, and ultrasonically stir in a water bath for 10 hours to obtain fully dispersed Spin precursor slurry.

[0043] (2) After removing air bubbles from the slurry, electrospinning is performed at 15KV and a feed rate of 0.05ml / min to obtain a polymer nanofiber film.

[0044] (3) Pre-oxidize the polymer nanofilm at 250°C in an air atmosphere, heat up at a rate of 3°C / min, keep it warm for 2 hours, and then carbonize and vulcanize it under a 15wt.% hydrogen sulfide atmosphere (argon carrier). The temperature is 600°C, the heating rate is 4°C / min, and the holding time is 2 hours. One-dimensional porous carbon fibers containing sulfide nanoparticles were obtained after cooling.

[0045] (4) Get 0.2g of the one-dimensional porous carbon fiber containing sulfide nanoparticles prepared in this embodiment, 0.025g polyvinylidene fluoride (PVDF), 0.025 conductive...

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Abstract

The invention belongs to the field of potassium ion battery materials, and discloses a one-dimensional porous carbon fiber containing sulfide nano particles as well as a preparation method and an application of the one-dimensional porous carbon fiber. A high-molecular polymer and an energetic substance-containing precursor are added into an organic solvent or deionized water, and ultrasonic stirring and dissolving or uniform dispersing are carried out to obtain a spinning precursor slurry, then a high-molecular nano-fiber thin film is obtained through electrostatic spinning, and next, pre-oxidation and carbonization and vulcanization treatment are sequentially carried out to obtain the one-dimensional porous carbon fiber containing sulfide nano particles. The one-dimensional porous carbonfiber containing the sulfide nano-particles has a porous structure, and meanwhile, the active sites are more, the ion transmission distance is short, the conductivity is high, the infiltration of an electrolyte is highly facilitated, and the one-dimensional porous carbon fiber, used as the negative electrode material of a potassium ion battery, has excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the field of potassium ion battery materials, and in particular relates to a one-dimensional porous carbon fiber containing sulfide nanoparticles and its preparation and application. Background technique [0002] With the large-scale application of lithium-ion batteries, the limitation and cost of lithium resources have aroused more and more concerns. In recent years, many new alternative energy storage batteries have emerged, mainly including secondary batteries such as sodium ions, potassium ions, and aluminum ions. Compared with lithium-ion batteries, potassium-ion batteries have many advantages, such as potassium is abundant in the earth's crust, widely distributed, and low in cost; the standard reduction potential of potassium-ion batteries is the closest to that of lithium-ion batteries, resulting in high energy density; in addition In addition, the wettability of electrolytes in potassium-ion batteries in carbon materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M10/054
CPCH01M4/364H01M4/5815H01M4/583H01M10/054Y02E60/10
Inventor 吴松平张申魁严玉蓉夏琪续安鼎陈焯文
Owner SOUTH CHINA UNIV OF TECH
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