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Cobalt silicate hydroxide/carbon nanotube flexible composite thin-film material and preparation method and application thereof

A technology of carbon nanotube film and hydroxide, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of slow electron transfer kinetics, low performance and low conductivity of lithium-ion batteries and other problems, to achieve the effect of testing high efficiency, excellent rate performance, and large specific surface area

Inactive Publication Date: 2019-12-24
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to their low conductivity and sluggish electron transfer kinetics, the performance of Li-ion batteries is poor

Method used

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  • Cobalt silicate hydroxide/carbon nanotube flexible composite thin-film material and preparation method and application thereof
  • Cobalt silicate hydroxide/carbon nanotube flexible composite thin-film material and preparation method and application thereof
  • Cobalt silicate hydroxide/carbon nanotube flexible composite thin-film material and preparation method and application thereof

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Embodiment 1

[0043] (1) Gas phase pyrolysis method prepares silicon oxide / carbon nanotube composite film material: 1) weigh 24.03g ethanol, 0.432g ferrocene, 0.22g thiophene, wherein, ethanol is as the carbon source of this reaction, ferrocene As a catalyst, thiophene is used as a promoter, and the above-mentioned tetraethyl orthosilicate (TEOS) with a total mass fraction of 4% (~1.028g) is weighed as a silicon source for the reaction, and the above solution is continuously ultrasonically dispersed at 50°C for 60 minutes. After obtaining a relatively uniform dispersion, transfer it to a syringe as a precursor solution; 2) Completely seal the vertical CVD furnace, continuously feed 100 sccm of Ar, completely remove the residual air in the furnace, and raise the temperature of the vertical CVD furnace to 1150°C , keep warm for 5h; 3) After steps 1) and 2) are completed, turn off the Ar, and continuously inject 800 sccm of H2 into the furnace. Inject into the furnace; about 20 minutes after t...

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Abstract

The invention discloses a cobalt silicate hydroxide (Co3Si2O5(OH)4) / carbon nanotube composite thin-film material. In the cobalt silicate hydroxide / carbon nanotube flexible composite thin-film material, sheet-structured cobalt silicate hydroxides are combined into clusters, carbon nanotubes pass through the sheets of the cobalt silicate hydroxides and are interwoven to a network structure. The preparation method comprises the steps that urea and cobalt nitrate are added into an aqueous solution of ethanol and uniformly dispersed; a silicon oxide / carbon nanotube thin film is added, soaked at room temperature for 3 to 24 hours, taken out, and placed in an oven at 95 DEG C to 115 DEG C for reaction for 1 to 24 hours; natural cooling at room temperature 18 to 25 DEG C is carried out; and washing with deionized water and drying are carried out to acquire the cobalt silicate hydroxide / carbon nanotube flexible composite thin-film material. The composite thin-film material can be used as an excellent lithium ion battery electrode material and a working electrode material for a super capacitor.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a cobalt silicate hydroxide / carbon nanotube flexible composite thin film material and its preparation method and application. Background technique [0002] As one of the most ideal energy storage systems, rechargeable lithium-ion batteries (LIBs) have received increasing attention due to their high energy density, high efficiency, and environmental friendliness. Although lithium-ion batteries have been commercialized for decades, new electrode materials with lower cost and higher capacity still need to be explored. Metal oxides, including ternary oxides, have been widely proven to be ideal materials for energy storage applications such as lithium-ion batteries, fuel cells, and electrochemical capacitors. However, due to their low conductivity and sluggish electron transfer kinetics, the performance of Li-ion batteries is poor. Therefore, the fabrication of novel elec...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36H01G11/46B82Y30/00
CPCB82Y30/00H01G11/30H01G11/36H01G11/46Y02E60/13
Inventor 侯峰卢竼漪
Owner TIANJIN UNIV
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