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Flower-shaped MoS<2>@graphene nanocomposite and preparation method therefor

A nanocomposite material and composite material technology, applied in the field of flower-like MoS2@graphene nanocomposite materials and their preparation, can solve the problems of limited material application, poor electrical conductivity, structural changes, etc., and achieve wide application prospects, material load High uniformity and uniform load

Inactive Publication Date: 2016-08-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the combination of high surface energy and van der Waals force between layers, the two-dimensional MoS 2 It is easy to re-accumulate during use, resulting in structural changes, which greatly limits the application of materials; at the same time, the poor conductivity also directly affects its performance.

Method used

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  • Flower-shaped MoS&lt;2&gt;@graphene nanocomposite and preparation method therefor
  • Flower-shaped MoS&lt;2&gt;@graphene nanocomposite and preparation method therefor
  • Flower-shaped MoS&lt;2&gt;@graphene nanocomposite and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0021] a. Weigh 30 mg of prepared graphene oxide with an electronic balance, dissolve it in 60 ml of deionized water, and ultrasonicate for 3 h to make it uniformly dispersed;

[0022] b. Add 30 mg of glucose to the above mixed solution, stir for 2 h, and fully dissolve;

[0023] c. Add 0.3 g of sodium molybdate to the above solution, and continue to stir for 1 h; then add 0.4 g of thiourea, and stir for 1 h;

[0024] d. Pour the reacted mixed solution into a polytetrafluoroethylene-lined autoclave and react at 200 °C for 24 h;

[0025] e. After the reaction is completed, the product is taken out from the reactor, centrifuged, washed repeatedly with deionized water and ethanol, and then dried at 60°C overnight to obtain the flower-like MoS prepared by the present invention 2 @graphene composite nanomaterials.

[0026] The physical properties of the obtained samples were characterized, and some of the results are shown in the accompanying drawings. From the results, it can b...

Embodiment 2

[0028] The preparation process and steps of this embodiment are basically the same as in Example 1, except that the b step:

[0029] Add 90 mg of glucosamine hydrochloride to the above mixed solution, and stir well;

[0030] Obtained result is similar to embodiment 1 result. All three-dimensional flower-like MoS 2 uniformly supported on graphene oxide.

Embodiment 3

[0032] The preparation process and steps of this embodiment are basically the same as in Example 1, except that the b step:

[0033] Add 60 mg of glucose to the above mixed solution, stir for 2 h, and fully dissolve;

[0034] The obtained result is different from Example 1, the difference is that MoS 2 load has been reduced.

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Abstract

The invention relates to a flower-shaped MoS<2>@graphene nanocomposite and a preparation method therefor. The nanocomposite is prepared by adopting a one-step hydrothermal synthesis method; graphene oxide, sodium molybdate and sulfourea are taken as the raw materials, and purified water is taken as the solvent; and then the flower-shaped and uniformly-loaded MoS<2>@graphene nanocomposite is obtained under the auxiliary effect of glucose or glucosamine hydrochloride. A TEM / SEM result proves that the ultra-thin MoS<2> nanosheets form the special flower shape, and are loaded to the high-quality graphene in a mono-dispersion manner; and an XRD spectrogram can prove that the MoS<2> is good in crystallization, and belongs to a hexagonal crystal system 2H-MoS<2> crystal phase. The graphene nanocomposite is simple in process, controllable in conditions, and high in load uniformity of the materials; and the prepared MoS<2>@graphene nanocomposite has a wide application prospect in the fields of new energies, such as the negative electrode material of lithium ion batteries, and the like.

Description

technical field [0001] The invention relates to a flower-like MoS 2 @Graphene nanocomposite materials and their preparation methods belong to the field of new energy materials such as lithium-ion batteries. Background technique [0002] Due to the shortage of energy and the consideration of environmental protection, the development of new energy is extremely important. Lithium-ion batteries, with their advantages of high energy density, long service life and relative environmental friendliness, have attracted more and more attention. At present, graphite, the commercial anode material, has limited its further application due to its low theoretical capacity (372 mAh / g) and poor rate performance. Therefore, the development of new negative electrode materials with high charge and discharge capacity, safety and economy is one of the research priorities in the field of battery materials. [0003] As a major branch in the field of materials, two-dimensional layered transition m...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/5815H01M10/0525H01M2004/021Y02E60/10
Inventor 张海娇徐来强李立昂
Owner SHANGHAI UNIV
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