Preparation method, product and application of ferroferric oxide/nitrogen doped graphene composite material

A nitrogen-doped graphene, ferric oxide technology, applied in nanotechnology, electrochemical generators, active material electrodes for materials and surface science, etc., can solve the problem that ferric tetroxide particles are difficult to anchor, It does not have the problems of 3D structure configuration and complex synthesis method, and achieves the effects of good three-dimensional pore structure channel, cheap raw materials and simple preparation process.

Active Publication Date: 2018-03-16
上海禾澜纳米科技有限公司
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  • Application Information

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Problems solved by technology

The above-mentioned synthesis method is relatively complicated, the process is cumbersome, and the yield is low. It is difficult for the ferroferric oxide particles to be completely anchored in the graphene material, and the obtained composite material does not have a certain 3D structural configuration.

Method used

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  • Preparation method, product and application of ferroferric oxide/nitrogen doped graphene composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Preparation of nitrogen-doped graphene oxide dispersion: Take 50 mL of graphene oxide dispersion prepared by the Hummers method in a beaker, take 10 mg of cyanamide as nitrogen source and slowly add to the dispersion and keep stirring, then add Distilled water, adjust the pH of the solution to 10; add the graphene oxide dispersion of nitrogen source at 140 o Heating and stirring at C temperature for 5 h, the stirring speed was controlled at 8000 rpm, then the solution was transferred to a polytetrafluoroethylene reactor, at 140 o Airtight and heat preservation at C temperature for 4 h;

[0023] b. Preparation of FeOOH / GO material: Weigh 1.0 g of iron acetate and add it to 50 mL of the nitrogen-doped graphene oxide dispersion, and stir continuously for 1 hour to obtain a stable brown suspension; Sealed in a polytetrafluoroethylene reactor, at 180 o Under the temperature of C for 12 hours of hydrothermal reaction, during this process, iron acetate is further hydrolyz...

Embodiment 2

[0026] a. Preparation of nitrogen-doped graphene oxide dispersion: Take 50 mL of graphene oxide dispersion prepared by the Hummers method in a beaker, take 10 mg of urea as a nitrogen source and slowly add it to the dispersion and keep stirring, then add distilled water, Adjust the pH of the solution to 12; add the graphene oxide dispersion of nitrogen source at 140 o Heating and stirring at C temperature for 5 h, the stirring speed was controlled at 8000 rpm, then the solution was transferred to a polytetrafluoroethylene reactor, at 140 o Airtight and heat preservation at C temperature for 4 h;

[0027] b. Preparation of FeOOH / GO material: Weigh 1.0 g of ferric nitrate and add it to 50 mL of the nitrogen-doped graphene oxide dispersion, and stir continuously for 1 hour to obtain a stable brown suspension; Sealed in a polytetrafluoroethylene reactor, at 180 o After hydrothermal reaction at C temperature for 12 hours, ferric nitrate is hydrolyzed into FeOOH and dispersed on t...

Embodiment 3

[0030] a. Preparation of nitrogen-doped graphene oxide dispersion: Take 50 mL of graphene oxide dispersion prepared by the Hummers method in a beaker, take 10 mg of dicyandiamide as nitrogen source and slowly add to the dispersion and keep stirring, then add Distilled water, adjust the pH of the solution to 12; add the graphene oxide dispersion of nitrogen source at 140 o Heating and stirring at C temperature for 5 h, the stirring speed was controlled at 8000 rpm, then the solution was transferred to a polytetrafluoroethylene reactor, at 140 o Airtight heat preservation at C temperature for 4 h;

[0031] b. Preparation of FeOOH / GO material: Weigh 1.0 g of iron acetate and add it to 50 mL of the nitrogen-doped graphene oxide dispersion, and stir continuously for 1 hour to obtain a stable brown suspension; Sealed in a polytetrafluoroethylene reactor, at 190 o Under the temperature of C for 12 hours of hydrothermal reaction, during this process, iron acetate is hydrolyzed into ...

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Abstract

The invention discloses a preparation method, a product and application of a ferroferric oxide / nitrogen doped graphene composite material. The preparation method includes: preparing nitrogen doped graphene oxide dispersion liquid, preparing a FeOOH / GO intermediate-state composite material, and preparing ferroferric oxide / nitrogen doped graphene. Soluble iron salt is used as a raw material, and hydrolysis and calcining of the iron salt are utilized for self-assembly to form the ferroferric oxide / nitrogen doped graphene composite material. The composite material has certain 3D structural configuration and has high specific surface area and good three-dimensional pore structure passages, and unique structure can optimize wetting condition of electrolyte to enable the composite material to present high operation stability.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic nanometer materials, and in particular relates to a preparation method of ferric oxide / nitrogen-doped graphene composite material and its product and application. Background technique [0002] In the current society, in the new energy storage technology with chemical energy storage as the application background, lithium-ion batteries have the advantages of high open circuit voltage, long cycle life, high energy density, no memory effect, and environmental friendliness, compared with other secondary batteries ( Ni-MH batteries, lead-acid batteries, nickel-cadmium batteries) have rapidly occupied many market fields due to their incomparable superior electrical properties and variable appearance, and have become the first choice for various portable electronic products, and are being applied to electric vehicles and other large and medium-sized Expansion of new energy fields such as energy sto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/52H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 何丹农王敬锋金彩虹
Owner 上海禾澜纳米科技有限公司
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