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Carbon nanofiber load titanium dioxide thin film anode material and preparation method thereof

A technology of carbon nanofiber and titanium dioxide, which is applied in the direction of battery electrodes, structural parts, electrical components, etc., to achieve strong controllability, performance improvement, and environmental friendliness

Active Publication Date: 2012-09-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no report on the preparation of carbon nanofiber-loaded one-dimensional nanostructured titanium dioxide film anode materials by electrospinning and hydrothermal reaction methods

Method used

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  • Carbon nanofiber load titanium dioxide thin film anode material and preparation method thereof
  • Carbon nanofiber load titanium dioxide thin film anode material and preparation method thereof
  • Carbon nanofiber load titanium dioxide thin film anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 3ml of tetra-n-butyl titanate and 2ml of anhydrous acetic acid and the mixed solution to 60ml of polyacrylonitrile (concentration is 9wt%) and polymethyl methacrylate (concentration is 3wt%) in the dimethylformamide solution, Forms a homogeneous solution for electrospinning.

[0046] During the electrospinning process, a No. 12 injection needle (inner diameter of 1.1mm) was selected, the applied electrostatic voltage was 18kV, the flow rate of the spinning solution was 0.6ml / h, and the receiving distance between the metal roller and the needle was 20cm. The radial speed is 8m / s, and after 5 hours of spinning, a partially parallel-oriented nanofiber membrane with a certain thickness is obtained.

[0047] The obtained electrospun nanofibrous membrane was subjected to constant strain pre-oxidation at 280 °C for 5 h, and then placed in a carbonization furnace at 600 °C under the protection of high-purity nitrogen for 2 h. The carbon nanofiber-loaded titanium dioxide na...

Embodiment 2

[0052] Add 6ml of tetra-n-butyl titanate and 4ml of anhydrous acetic acid and the mixed solution to 60ml of polyacrylonitrile (concentration is 9wt%) and polymethylmethacrylate (concentration is 3wt%) in the dimethylformamide solution, Forms a homogeneous solution for electrospinning. After electrospinning, pre-oxidation and carbonization, the preparation of carbon nanofiber-supported titanium dioxide nanoparticle composite film refers to Example 1.

[0053] The composite film was immersed in 10mol / L sodium hydroxide aqueous solution, transferred to a polytetrafluoroethylene-lined hydrothermal reactor, and kept in a vacuum oven at 230°C for 12 hours to obtain carbon nanofiber-supported sodium titanate nanotubes .

[0054] The composite film was taken out and washed with deionized water to pH = 7, immersed in an aqueous hydrochloric acid solution with pH = 2, and left at room temperature for 24 hours to obtain titanate nanotubes supported by carbon nanofibers, and the shape an...

Embodiment 3

[0057] Add 6ml of tetra-n-butyl titanate and 4ml of anhydrous acetic acid and the mixed solution to 60ml of polyacrylonitrile (concentration is 9wt%) and polymethylmethacrylate (concentration is 3wt%) in the dimethylformamide solution, Forms a homogeneous solution for electrospinning. After electrospinning, pre-oxidation and carbonization, the preparation of carbon nanofiber-supported titanium dioxide nanoparticle composite film refers to Example 1.

[0058] The composite film was immersed in 10mol / L sodium hydroxide aqueous solution, transferred to a polytetrafluoroethylene-lined hydrothermal reaction kettle, and kept in a vacuum oven at 230°C for 50 hours to obtain carbon nanofiber-supported sodium titanate nanoparticles. Tube and nanowire hybrid.

[0059] Take out the composite film and wash it with deionized water to pH = 7, immerse in an aqueous hydrochloric acid solution with pH = 2, and place it at room temperature for 24 hours to obtain a mixture of nanotubes and nano...

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Abstract

The invention relates to a carbon nanofiber load titanium dioxide thin film anode material and a preparation method thereof, and solves the technical problems that nano-scale titanium dioxide is reunited and inactivated easily during recycling of a lithium ion battery, and the conductivity is low. The carbon nanofiber load titanium dioxide thin film anode material comprises carbon nanofibers and titanium dioxide, wherein the mass of the titanium dioxide is 10 to 30 percent of the total mass of the thin film anode material. The carbon nanofiber load titanium dioxide thin film anode material which is prepared by the method and has a one-dimensional nano structure has relatively high specific capacity, high charging and discharging speed and high recycling stability and can completely use the advantages of the carbon nanofibers and the titanium dioxide.

Description

technical field [0001] The invention relates to a titanium dioxide thin film negative electrode material and a preparation method thereof, in particular to a carbon nanofiber supported titanium dioxide thin film negative electrode material and a preparation method thereof. Background technique [0002] Due to the advantages of small size, high power density, long cycle life, small self-discharge, and high cost performance, lithium-ion batteries occupy a dominant position in the portable electronic product market and are widely used in many mobile electronic devices such as mobile phones, digital cameras, and notebook computers. field. With the rapid development of communications, medical, military, and aerospace industries, high-tech fields such as microelectronics, micro-medical devices, and electric vehicles have put forward higher requirements for the performance and capacity of lithium-ion secondary batteries. Therefore, high-power electrode materials with more stable p...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/48
CPCY02E60/12Y02E60/10
Inventor 于运花李佩文滕东华杨小平
Owner BEIJING UNIV OF CHEM TECH
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