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A MoO3/rGO-N nano composite material and a preparation method and application thereof

A composite material and mixed solution technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as unfavorable chemical bonds, failure to reach composite materials, etc., achieve good electrical conductivity, improve electrical conductivity Performance, effect of short electron transmission distance

Active Publication Date: 2018-12-21
SHENZHEN TRUSDA INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

But graphene is a carbon atom with sp 2 Two-dimensional carbon nanomaterials with hexagonal honeycomb lattice composed of hybrid orbitals have a relatively stable surface, which is not conducive to forming stable chemical bonds with transition metal oxides, sulfides, phosphides, etc. , can only form a mixed material, which cannot meet the requirements of ideal composite materials

Method used

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  • A MoO3/rGO-N nano composite material and a preparation method and application thereof
  • A MoO3/rGO-N nano composite material and a preparation method and application thereof
  • A MoO3/rGO-N nano composite material and a preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a kind of MoO 3 / rGO-N composite material, and this kind of MoO 3 / rGO-N composites preparation method.

[0034] MoO described in this example 3 / rGO-N composites including nitrogen-doped redox graphene and flake-like MoO grown on the surface of nitrogen-doped redox graphene 3 , the composite material has a three-dimensional porous structure, and the specific preparation steps are as follows:

[0035] (1) Preparation of graphene oxide (GO): 5 g of natural graphite powder was added to 150 mL of concentrated sulfuric acid (w=98%), and 3.75 g of sodium nitrate was added under stirring at room temperature. Under vigorous stirring, slowly add 20g of potassium permanganate, keeping the temperature of the suspension below 20°C, then transfer the reaction system to room temperature, and stir for about 20h to form a thick slurry. Under the condition of constant stirring, slowly add 640mL of deionized water, then slowly add 30mL of hydrogen peroxide (...

Embodiment 2

[0042] This embodiment provides a kind of MoO 3 / rGO-N composite material, and this kind of MoO 3 / rGO-N composites preparation method.

[0043] MoO described in this example 3 / rGO-N composites including nitrogen-doped redox graphene and flake-like MoO grown on the surface of nitrogen-doped redox graphene 3 , the composite material has a three-dimensional porous structure, and the specific preparation steps are as follows:

[0044] (1) The preparation of graphene oxide (GO) is the same as in Example 1.

[0045] (2) Add 125mg GO to 50ml deionized water, stir magnetically for 30min and sonicate for 6h (control the water temperature below 40°C) to completely disperse graphene oxide in the aqueous solution. Subsequently, 0.75 g of sodium molybdate and 3.75 g of ammonium chloride were added thereto, and heated and stirred in an oil bath at 120° C. for 4 h. The resulting mixed solution was transferred to a reaction kettle and reacted at 180°C for 20 hours. After the reaction k...

Embodiment 3

[0048] This embodiment provides a kind of MoO 3 / rGO-N composite material, and this kind of MoO 3 / rGO-N composites preparation method.

[0049] MoO described in this example 3 / rGO-N composites including nitrogen-doped redox graphene and flake-like MoO grown on the surface of nitrogen-doped redox graphene 3 , the composite material has a three-dimensional porous structure, and the specific preparation steps are as follows:

[0050] (1) The preparation of graphene oxide (GO) is the same as in Example 1.

[0051] (2) Add 125mg GO to 50ml deionized water, stir magnetically for 30min and sonicate for 6h (control the water temperature below 40°C) to completely disperse graphene oxide in the aqueous solution. Subsequently, 0.75 g of potassium molybdate and 3.75 g of ammonium chloride were added thereto, and heated and stirred in an oil bath at 120° C. for 4 h. The resulting mixed solution was transferred to a reaction kettle and reacted at 180°C for 20 hours. After the reactio...

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Abstract

The invention relates to the technical field of nanometer materials, in particular to a MoO3 / rGO-N nanocomposite material, a preparation method thereof and application thereof in lithium ion battery.In the MoO3 / rGO-N nanocomposites, three-dimensional nitrogen doped reduced graphene oxide (NDRGO) lamellae provides the substrate for the growth of molybdenum trioxide (MoO3), which can disperse uniformly and grow on the surface of NDRGO. The structure of MoO3 / rGO-N nano-composite combines the advantages of short electron transport distance the good conductivity of three-dimensional nitrogen dopedreduced graphene oxide and MoO3 nano-sheet ions, can not only improve the conductivity of the whole material, but also effectively alleviate the volume change and aggregation of molybdenum trioxide nanoparticles in the charge / discharge process, maintain good structural integrity, have good electrochemical properties, and can be used as the negative electrode material of lithium batteries. The preparation method of the invention is simple in process, high in yield and easy to expand production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a kind of MoO 3 / rGO-N nanocomposite material and its preparation method and its application in lithium-ion batteries. Background technique [0002] At present, the negative electrode materials of lithium-ion batteries are mainly graphite materials, but the energy density of graphite materials is low, which seriously restricts the rapid development of the lithium battery industry. Transition metal oxides are considered to be promising anode materials for lithium-ion batteries because of their high theoretical capacity, ease of large-scale preparation, and environmental friendliness. So far, a large number of transition metal oxides with different shapes, sizes and structures have been successfully prepared, including molybdenum oxide, cobalt oxide, iron oxide, nickel oxide, manganese oxide, zinc oxide, etc., which are used as Lithium-ion battery anode materials all exhibi...

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
CPCB82Y30/00H01M4/366H01M4/48H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 李志刚武秀斌周汉鹏周朝强周佳鑫
Owner SHENZHEN TRUSDA INDUSTRIAL CO LTD
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