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Preparation method for titanium dioxide (B)-graphene self-winding nano composite material

A nanocomposite material, titanium dioxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex operation of titanium dioxide nanotube powder, unbearable charge and discharge, and increased production cost, etc. Achieve excellent structural stability and electrical conductivity, good electrochemical performance, and structural stability

Active Publication Date: 2014-04-02
重庆锦添翼新能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages of this method are: 1. the operation of preparing graphene oxide dispersion and graphene-titania nanotube powder is complicated, and it is inconvenient to popularize and apply; 2. because the P25 used is an imported raw material, the price is expensive, thereby increasing the production cost; 3. in this method, The multiple cleaning solutions are directly discharged without being collected and processed, polluting the environment; ④The products prepared by this method have poor conductivity due to the limited contact area between titanium dioxide and graphene, and because titanium dioxide nanotubes are loaded on the surface of graphene , poor structural stability, difficult to withstand charge and discharge under high current density, so this product is only suitable for small lithium-ion batteries, solar batteries and other fields, not suitable for power lithium-ion battery anode materials, and its application range is limited

Method used

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  • Preparation method for titanium dioxide (B)-graphene self-winding nano composite material
  • Preparation method for titanium dioxide (B)-graphene self-winding nano composite material
  • Preparation method for titanium dioxide (B)-graphene self-winding nano composite material

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Embodiment 1

[0025] The specific steps of a preparation method of titanium dioxide (B)-graphene self-winding nanocomposite material are as follows:

[0026] (1) carry out hydrothermal reaction

[0027] Taking commercially available titanium dioxide powder and graphene oxide solution as raw materials, according to the mass (g) of titanium dioxide powder: the volume (mL) of graphene oxide solution: the ratio of the volume (mL) of sodium hydroxide solution is 1: 20: 250 Ratio, the concentration of the graphene oxide solution is 10 mg / mL, and the concentration of the sodium hydroxide solution is 10 mol / L. First, titanium dioxide powder was added into the graphene oxide solution, and stirred for 4 hours to prepare a uniform dispersion of titanium dioxide. Add the sodium hydroxide solution into the dispersion, and stir for another 30 minutes to prepare a uniform mixed solution of titanium dioxide-graphene oxide-sodium hydroxide, and then place the mixed solution in the reaction kettle, A hydro...

Embodiment 2

[0031] The specific steps of a preparation method of titanium dioxide (B)-graphene self-winding nanocomposite material are as follows:

[0032] With embodiment 1, wherein:

[0033] In the (1) step, the mass (g) of titanium dioxide powder: the volume (mL) of graphene oxide solution: the ratio of the volume (mL) of sodium hydroxide solution is 1: 10: 80, and described graphene oxide solution The concentration is 2 mg / mL, and the concentration of the sodium hydroxide solution is 6 mol / L. Add the titanium dioxide powder raw material into the graphene oxide solution, stir for 2 hours to prepare a uniform dispersion of titanium dioxide, then add sodium hydroxide solution to the dispersion, and stir for another 10 minutes to form titanium dioxide-graphite oxide A homogeneous mixture of ene-sodium hydroxide, the hydrothermal reaction temperature is 120°C, and the reaction time is 24 hours;

[0034] In the 2nd step, the thick thing that the 1st step makes: the ratio of the volume (mL) ...

Embodiment 3

[0036] The specific steps of a preparation method of titanium dioxide (B)-graphene self-winding nanocomposite material are as follows:

[0037] With embodiment 1, wherein:

[0038] In the (1) step, the mass (g) of titanium dioxide powder: the volume (mL) of graphene oxide solution: the ratio of the volume (mL) of sodium hydroxide solution is 1: 50: 400, and described graphene oxide solution The concentration is 20 mg / mL, and the concentration of the sodium hydroxide solution is 15 mol / L. Add the titanium dioxide powder raw material into the graphene oxide solution, stir for 6 hours to prepare a uniform dispersion of titanium dioxide, then add sodium hydroxide solution to the dispersion, and stir for another 60 minutes to form titanium dioxide-graphite oxide A homogeneous mixture of ene-sodium hydroxide, the hydrothermal reaction temperature is 180°C, and the reaction time is 96 hours;

[0039] In the (2) step, the thick thing that (1) step makes: the ratio of the volume (mL)...

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Abstract

The invention discloses a preparation method for a titanium dioxide (B)-graphene self-winding nano composite material and belongs to the technical field of carbon nano composite material preparation. The preparation method comprises the step of performing hydrothermal reaction on commercially available titanium dioxide powder and a graphene oxide solution which serve as raw materials to prepare the titanium dioxide (B)-graphene self-winding nano composite material. The preparation method disclosed by the invention has the characteristics of simplicity, easiness in operation, readily available raw material, low price, low production cost, convenience in popularization and application, suitability for industrial production and the like. A product prepared by the method disclosed by the invention is high in conductivity and high in structural stability and can bear charging and discharging under high current density. The preparation method can be widely used for preparation of the titanium dioxide (B)-graphene self-winding nano composite material. The product prepared by the method disclosed by the invention can be widely applied to the fields of photocatalysts, air purification, dye-sensitized solar batteries, lithium ion batteries and the like and is particularly suitable to be used as a cathode material of a powder type lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of carbon nanocomposite material preparation, and in particular relates to a preparation method of titanium dioxide (B)-graphene self-winding nanocomposite material in carbon nanocomposite material. Background technique [0002] Titanium dioxide (B) has the advantages of low price, wide source, non-toxic, non-polluting, and good stability. It is widely used in the fields of photocatalytic pollutant treatment, dye-sensitized solar cells, lithium-ion batteries, etc., and has been favored by material researchers. extensive attention. Titanium dioxide (B) nanotubes have the advantages of large specific surface area, uniform tube diameter, and stable structure. When used as electrode materials, their hollow structure is conducive to the rapid migration of lithium ions, and can effectively alleviate the volume loss caused by micro-stress during charging and discharging. Effect, to avoid the pulverization of elect...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/587
CPCY02E60/122B82Y30/00H01M4/366H01M4/485H01M4/587H01M10/0525Y02E60/10
Inventor 李新禄张勇来李同涛钟奇能黄佳木李鸿乂吴启鹏李俊杰张成荧
Owner 重庆锦添翼新能源科技有限公司
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