Graphene-based FeS2 nano-material and preparation and application thereof

A nanomaterial, graphene-based technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as long reaction time, achieve low cost, good cycle performance, good structural stability sexual effect

Active Publication Date: 2016-09-07
GUANGDONG ORIENT RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrothermal method needs to be carried out under the conditions of high temperature and high pressure, and the reaction time is long, which still has certain disadvantages for industrial production, and there are also major safety hazards

Method used

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  • Graphene-based FeS2 nano-material and preparation and application thereof
  • Graphene-based FeS2 nano-material and preparation and application thereof
  • Graphene-based FeS2 nano-material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Put 0.0408g of graphene oxide in 30ml of water and ultrasonically disperse for 3 hours to obtain a graphene oxide suspension, then add 0.0401g of vitamin C to dissolve it, and then ultrasonically disperse it for 10 minutes to obtain a graphene suspension;

[0034] (2) Na 2 Add 3mmol each of S and sublimated sulfur into water, heat and stir until the sulfur is completely dissolved to obtain yellow-brown Na 2 S 2 solution;

[0035] (3) Add 3mmol FeSO 4Dissolve in 20ml of water and mix with the graphene suspension in step (1), then add the Na obtained in step (2) 2 S 2 solution, heated up to 100°C, refluxed for 2 hours under an inert gas atmosphere, cooled to room temperature after the reaction, centrifuged with water and ethanol, dried the separated product at 60°C, and ground to obtain 10wt% GNs@FeS 2 Powder, graphene coating amount was determined by thermogravimetric analysis (TGA).

Embodiment 2

[0037] (1) Put 0.0910g of graphene oxide in 30ml of water and ultrasonically disperse for 3 hours to obtain a graphene oxide suspension, then add 0.0900g of vitamin C to dissolve and ultrasonically 10min to obtain a graphene suspension;

[0038] (2) Na 2 Add 3mmol each of S and sublimated sulfur into water, heat and stir until the sulfur is completely dissolved to obtain yellow-brown Na 2 S 2 solution;

[0039] (3) Add 3mmol FeSO 4 Dissolve in 20ml of water and mix with the graphene suspension in step (1), then add the Na obtained in step (2) 2 S 2 Solution, heated up to 100°C, reflux reaction for 1h under an inert gas atmosphere, cooled to room temperature after the reaction was completed, centrifuged with water and ethanol, dried the separated product at 60°C, and ground to obtain 20wt% GNs@FeS 2 Powder, graphene coating amount was determined by thermogravimetric analysis (TGA).

[0040] The products prepared in this example use X-ray diffraction (XRD) and Raman spectr...

Embodiment 3

[0042] (1) Put 0.1538g of graphene oxide in 30ml of water and ultrasonically disperse for 3 hours to obtain a graphene oxide suspension, then add 0.1538g of vitamin C to dissolve and ultrasonically 10min to obtain a graphene suspension;

[0043] (2) Na 2 Add 3mmol each of S and sublimated sulfur into water, heat and stir until the sulfur is completely dissolved to obtain yellow-brown Na 2 S 2 solution;

[0044] (3) Add 3mmol FeSO 4 Dissolve in 20ml of water and mix with the graphene suspension in step (1), then add the Na obtained in step (2) 2 S 2 Solution, heated up to 100°C, reflux reaction for 3h under an inert gas atmosphere, cooled to room temperature after the reaction was completed, centrifuged with water and ethanol, dried the separated product at 60°C, and ground to obtain 30wt% GNs@FeS 2 Powder, graphene coating amount was determined by thermogravimetric analysis (TGA).

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Abstract

The invention belongs to the technical field of lithium-ion battery materials, and discloses a graphene-based FeS2 nano-material and a preparation and an application thereof. The preparation method comprises the following steps: ultrasonically dispersing graphene oxide into water to obtain a graphene oxide suspension liquid, adding a reducing agent for ultrasonic treatment and then obtaining a graphene suspension liquid; adding Na2S and S to water, heating, stirring and dissolving the Na2S and the S evenly to obtain an Na2S2 solution; dissolving FeSO4 into water and mixing the solution with the graphene suspension liquid; and adding the Na2S2 solution, heating the Na2S2 solution to 100 DEG C, carrying out reflux reaction in an inert gas atmosphere for 0.5-3 hours, and centrifugally separating, drying and grinding a reaction product to obtain the graphene-based FeS2 nano-material. The obtained material can be applied to a negative electrode of the lithium-ion battery, and is relatively high in specific capacity and relatively good in performance under a high-rate condition.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery materials, in particular to a graphene-based FeS 2 Nanomaterials and their preparation and application. Background technique [0002] At present, energy sources such as oil and natural gas are gradually scarce, people's awareness of environmental protection is gradually increasing, and the development of transportation tools has begun to turn to environmentally friendly electric vehicles and hybrid vehicles. Rechargeable batteries are the core components of electric vehicles, and the development of high energy density batteries is a top priority. Developed countries are investing heavily in research and development of new battery materials and technologies to improve energy storage and charge / discharge performance, improve battery durability and reliability, and reduce costs. Lithium-ion batteries have attracted increasing attention due to their advantages such as high energy density...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00
CPCH01M4/366H01M4/5815H01M4/625H01M10/0525B82Y30/00H01M2004/027H01M2004/021Y02E60/10
Inventor 杜瑶吴松平刘淳田小东
Owner GUANGDONG ORIENT RESIN
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