Titanium/graphene nanoribbon composite anode material and preparation method thereof

A technology of graphene nanobelts and nanocomposites, which is applied in the direction of negative electrodes, nanotechnology, nanotechnology, etc., can solve the problems of complex process and difficult large-scale preparation, and achieve simple process, excellent electrochemical performance, and good charging. Effect of Discharge Characteristics

Active Publication Date: 2017-12-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses hydrothermal reaction and sol-gel method, the process is complicated, and it is difficult to prepare on a large scale.

Method used

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  • Titanium/graphene nanoribbon composite anode material and preparation method thereof
  • Titanium/graphene nanoribbon composite anode material and preparation method thereof
  • Titanium/graphene nanoribbon composite anode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] A titanium dioxide / graphene nanoribbon composite negative electrode material

[0040] A quasi-one-dimensional nanocomposite material formed by titanium dioxide confined in graphene nanoribbons in the form of nanoparticles; the mass fraction of graphene nanoribbons in the titanium dioxide / graphene nanoribbon composite negative electrode material is 53% (wherein, graphene nanoribbons ribbon 12.4mg, titanium dioxide 11.0mg), the width of the graphene nanoribbon is 40nm, the average thickness is 3nm, and the particle diameter of the titanium dioxide is 8nm.

[0041] Depend on figure 1 It can be seen that the titanium dioxide / graphene nanobelt composite negative electrode material in the embodiment of the present invention is anatase titanium dioxide.

[0042] Depend on figure 2 It can be seen that on the graphene nanobelt of the quasi-one-dimensional nanostructure of the titanium dioxide / graphene nanoribbon composite negative electrode material in the embodiment of the p...

Embodiment 2

[0052] A titanium dioxide / graphene nanoribbon composite negative electrode material

[0053] A quasi-one-dimensional nanocomposite material formed by titanium dioxide confined in graphene nanoribbons in the form of nanoparticles; the mass fraction of graphene nanoribbons in the titanium dioxide / graphene nanoribbon composite negative electrode material is 42.2% (wherein, graphene nanoribbons ribbon 24.8mg, titanium dioxide 34.0mg), the width of the graphene nanoribbon is 50 nm, the average thickness is 4nm, and the particle size of the titanium dioxide is 15nm.

[0054] A preparation method of titanium dioxide / graphene nanobelt composite negative electrode material

[0055] (1) Add 40 mg of graphene oxide nanoribbons into 90 mL of propanol, and ultrasonically disperse at 30 kHz, 20°C for 3 hours to obtain a suspension of graphene oxide nanoribbons;

[0056] (2) Add 150 μL tetrabutyl titanate and 150 μL deionized water to the graphene oxide nanoribbon suspension obtained in ste...

Embodiment 3

[0063] A titanium dioxide / graphene nanoribbon composite negative electrode material

[0064] It is a quasi-one-dimensional nanocomposite material formed by titanium dioxide confined in graphene nanobelts in the form of nanoparticles; in the titanium dioxide / graphene nanobelt composite negative electrode material, the mass content of graphene nanobelts is 39.3% (wherein graphite 18.6 mg of graphene nanobelts, 28.7 mg of titanium dioxide), the width of the graphene nanobelts is 90 nm, the average thickness is 5 nm, and the particle size of the titanium dioxide is 25 nm.

[0065] A preparation method of titanium dioxide / graphene nanobelt composite negative electrode material

[0066] (1) Add 30 mg of graphene oxide nanobelts into 80 mL of ethanol, and ultrasonically disperse at 40kHz, 45°C for 2 hours to obtain a suspension of graphene oxide nanobelts;

[0067] (2) Add 200 μL tetrabutyl titanate and 200 μL deionized water to the graphene oxide nanoribbon suspension obtained in s...

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Abstract

The invention discloses a titanium / graphene nanoribbon composite anode material and a preparation method thereof. The anode material is a quasi-one-dimensional nano composite material formed through titanium in a nano-particle shape limited in a graphene nanoribbon. The preparation method comprises the steps that 1, the oxidized graphene nanoribbon is added into an organic solvent, and ultrasonic dispersion is conducted; 2, a titanium source and water are added, centrifugal separation is conducted after heating reflux is conducted, and washing, filtering and drying are conducted on segment; 3, in protective atmosphere, heating treatment and cooling are conducted to obtain the titanium / graphene nanoribbon composite anode material. According to the composite anode material, under 0.01-3.0 V and 500 mA.g-1, the first reversible specific capacity is 375.7 mAh.g-1, after 100 times of circulation, the reversible specific capacity is 320.8 mA.g-1, and under 8000 mA.g-1, the reversible specific capacity can reach 206.7 mAh.g-1, so that the electrohemical performance is good; the method is simple and suitable for industrial production.

Description

technical field [0001] The invention relates to a lithium ion battery negative electrode material and a preparation method thereof, in particular to a titanium dioxide / graphene nanobelt composite negative electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in mobile electronic devices and are considered as the most important power source for hybrid electric vehicles, plug-in hybrid electric vehicles and pure electric vehicles. However, the low specific capacity and rate performance of traditional graphite anodes severely limit the development of current lithium-ion batteries, and it is difficult to meet the requirements of continuously developing electrical equipment. [0003] Titanium dioxide is used as a negative electrode material for lithium-ion batteries because of its high theoretical specific capacity, abundant raw materials, low cost, no pollution, stable battery cycle performance and good saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/48H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 喻万景何文洁张宝易旭安长胜童汇郑俊超张佳峰
Owner CENT SOUTH UNIV
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