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Method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite

A nanocomposite material and in-situ synthesis technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of negative electrode materials restricting practical applications, and achieve good cycle stability and excellent storage Sodium performance, effect of high specific capacity

Inactive Publication Date: 2016-07-27
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the practical application of sodium-ion batteries is restricted due to the lack of suitable anode materials, and the development of anode materials with excellent performance is currently a research hotspot and focus in this field.

Method used

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  • Method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite
  • Method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite
  • Method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite

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Experimental program
Comparison scheme
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Embodiment 1

[0027] An in-situ synthesized TiO 2 The method for the mesogen-carbon-graphene nanocomposite material specifically comprises the following steps:

[0028] (1) Disperse and dissolve 0.2g of polyvinylpyrrolidone in 35mL of 1.5mol / L nitric acid solution, and stir for 5 minutes;

[0029] (2) Add 20 mg of graphene oxide to the solution prepared in step (1), and stir for 30 minutes while ultrasonicating;

[0030] (3) Add 1.5 g of sodium cetyl sulfate to the solution prepared in step (2), stir to disperse and dissolve;

[0031] (4) Add 0.7mL isopropyl titanate dropwise to the solution prepared in step (3), and react at 60°C for 30h;

[0032] (5) The reaction system in step (4) was centrifuged and washed to obtain an off-white solid, and the solid was annealed and carbonized at 500°C to obtain the TiO 2 Mesogen-carbon-graphene nanocomposites.

[0033] An in-situ synthesized TiO 2 TiO prepared by mesogenic-carbon-graphene nanocomposite method 2 Mesogen-carbon-graphene nanocomposi...

Embodiment 2

[0043] An in-situ synthesized TiO 2 The method for the mesogen-carbon-graphene nanocomposite material specifically comprises the following steps:

[0044] (1) Disperse and dissolve 0.6g of polyvinylpyrrolidone in 40mL of 2.0mol / L nitric acid solution, and stir for 8 minutes;

[0045] (2) Add 30 mg of graphene oxide to the solution prepared in step (1), and stir for 40 minutes while ultrasonicating;

[0046] (3) Add 1.8g of sodium cetyl sulfate to the solution prepared in step (2), stir to disperse and dissolve;

[0047] (4) Add 1.1 mL of isopropyl titanate dropwise to the solution prepared in step (3), and react at 70°C for 40 hours;

[0048] (5) The reaction system in step (4) was centrifuged and washed to obtain an off-white solid, and the solid was annealed and carbonized at 600°C to obtain the TiO 2 Mesogen-carbon-graphene nanocomposites.

[0049] An in-situ synthesized TiO 2 TiO prepared by mesogenic-carbon-graphene nanocomposite method 2 Mesogen-carbon-graphene nan...

Embodiment 3

[0054] An in-situ synthesized TiO 2 The method for the mesogen-carbon-graphene nanocomposite material specifically comprises the following steps:

[0055] (1) Disperse and dissolve 0.8g of polyvinylpyrrolidone in 60mL of 2.5mol / L nitric acid solution, and stir for 10 minutes;

[0056] (2) Add 40 mg of graphene oxide to the solution prepared in step (1), and stir for 50 minutes while ultrasonicating;

[0057] (3) Add 2.5g of sodium cetyl sulfate to the solution prepared in step (2), stir to disperse and dissolve;

[0058] (4) Add 1.5mL of isopropyl titanate dropwise to the solution prepared in step (3), and react at 90°C for 60h;

[0059] (5) The reaction system in step (4) was centrifuged and washed to obtain an off-white solid, and the solid was annealed and carbonized at 700°C to obtain the TiO 2 Mesogen-carbon-graphene nanocomposites.

[0060] An in-situ synthesized TiO 2 TiO prepared by mesogenic-carbon-graphene nanocomposite method 2 Mesogen-carbon-graphene nanocomp...

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Abstract

The invention relates to a method and application of in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite. The method includes the steps of dispersing and dissolving polyvinylpyrrolidone, adding graphene oxide, cetyl sodium sulfate and titanium isopropoxide respectively, centrifuging, washing, annealing and carbonizing to obtain the nanocomposite. In the composite electrode material, the TiO2 mesomorphase is anatase TiO2, micro nanocrystallines are uniformly dispersed and embedded in the graphene, and then the graphene is uniformly coated with a layer of amorphous carbon, and the mixro nanocrystallines are in alignment along the direction of (101). The in-situ synthesized TiO2 mesomorphase-carbon-graphene nanocomposite has a very large surface area up to 280-290m<2>g<-1>. The nanocomposite has great electrical conductivity and good tenacity, is easy to operate, low in cost, high in purity, excellence in property and capable of large-scale synthesis, which can be popularized and applied to other fields of energies and catalysis.

Description

technical field [0001] The invention relates to nanocomposite materials, in particular to an in-situ synthesis of TiO 2 Methods and applications of mesogen-carbon-graphene nanocomposites. Background technique [0002] Lithium-ion batteries (LIBs) have been widely used in mobile electronic devices, defense industry, and electric vehicles due to their remarkable advantages such as high capacity, high voltage, and long cycle life. However, with the continuous popularization of lithium-ion batteries, the price of lithium (lithium carbonate) continues to rise, and the reserves of lithium resources in the earth are also small, unevenly distributed, and difficult to mine. Compared with lithium, sodium element has more abundant reserves, low price and wide sources. Therefore, sodium-ion batteries have received extensive attention in recent years, and they have better application prospects than LIBs in large-scale applications in the field of energy storage in the future. At presen...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/48H01M4/625H01M10/054H01M2004/021Y02E60/10
Inventor 洪振生张俊文周凯强黄志高
Owner FUJIAN NORMAL UNIV
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