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Preparation method of ferric oxide/folded graphene film material

A technology of ferric oxide and graphene film, which is applied in the direction of iron oxide/iron hydroxide, graphene, iron oxide, etc., can solve the problem of graphene sheet structure damage, etc., to achieve the benefit of ion and charge transport, high Conductive network, the effect of reducing the amount of oxidation

Inactive Publication Date: 2019-11-19
YANCHENG TEACHERS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although single-layer and few-layer graphene can be efficiently exfoliated by the graphite oxide method, it is necessary to avoid serious damage to the graphene sheet structure.

Method used

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  • Preparation method of ferric oxide/folded graphene film material
  • Preparation method of ferric oxide/folded graphene film material
  • Preparation method of ferric oxide/folded graphene film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mix 300mg of anhydrous ferric chloride and 60mg of expanded graphite evenly, vacuumize, seal in a 50mL glass bottle, and heat at 400°C for 4h to prepare a pure second-order graphite intercalation compound. Dissolve the graphite intercalation compound in Dilute hydrochloric acid solution, filter and dry.

[0033] (2) The graphite intercalation compound was added into a mixed solution of 20 mL of concentrated sulfuric acid and 10 mL of concentrated nitric acid, stirred in ice water (0° C.) for 0.5 hour, 360 mg of sodium chlorate was put into the solution, and stirred at room temperature for 12 hours, The product was washed by centrifugation.

[0034] (3) Put oxygen-containing group layers and ferric chloride intercalated graphite alternately into 50 mL aqueous solution for ultrasonic treatment for 1 hour to obtain ferric chloride intercalated graphene oxide dispersible in water, which is then suction-filtered to form a film.

[0035] (4) Immerse the film in a hydroge...

Embodiment 2

[0039] (1) Mix 300mg of anhydrous ferric chloride and 60mg of expanded graphite evenly, vacuumize, seal in a 50mL glass bottle, and heat at 400°C for 4h to prepare a pure second-order graphite intercalation compound. Dissolve the graphite intercalation compound in Dilute hydrochloric acid solution, filter and dry.

[0040] (2) Add the graphite intercalation compound into 20 mL of concentrated sulfuric acid solution, stir in ice water (0° C.) for 0.5 hour, put 360 mg of potassium permanganate into the solution, stir at room temperature for 12 hours, and centrifuge the product.

[0041] (3) Put oxygen-containing group layers and ferric chloride intercalated graphite alternately into 50 mL aqueous solution for ultrasonic treatment for 1 hour to obtain ferric chloride intercalated graphene oxide dispersible in water, which is then suction-filtered to form a film.

[0042] (4) Immerse the film in a hydrogen peroxide solution with a mass fraction of 30%. The liquid surface of the hy...

Embodiment 3

[0046] (1) Mix 300mg of anhydrous ferric chloride and 60mg of expanded graphite evenly, vacuumize, seal in a 50mL glass bottle, and heat at 400°C for 4h to prepare a pure second-order graphite intercalation compound. Dissolve the graphite intercalation compound in Dilute hydrochloric acid solution, filter and dry.

[0047] (2) The graphite intercalation compound was added into a mixed solution of 20 mL of concentrated sulfuric acid and 10 mL of concentrated nitric acid, stirred in ice water (0° C.) for 0.5 hour, 360 mg of sodium chlorate was put into the solution, and stirred at room temperature for 12 hours, The product was washed by centrifugation.

[0048] (3) Put oxygen-containing group layers and ferric chloride intercalated graphite alternately into 50 mL aqueous solution for ultrasonic treatment for 1 hour to obtain ferric chloride intercalated graphene oxide dispersible in water, which is then suction-filtered to form a film.

[0049] (4) Immerse the film in a hydroge...

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Abstract

The invention provides a preparation method of a ferric oxide / folded graphene film material. The method comprises the following steps of: preparing a graphene material by alternately intercalating anoxygen-containing group layer and ferric trichloride, stripping off the oxygen-containing group layer, performing suction filtration to form a film, sequentially immersing the film into a hydrogen peroxide solution and an alkaline solution for reaction to obtain a ferric hydroxide / folded graphene oxide film, and performing high-temperature treatment to obtain the ferric oxide / folded graphene film.According to the method, hydrogen peroxide is decomposed to generate a large number of wrinkles in the film, the wrinkles have universality and uniformity, damage to a graphene lamellar structure iseffectively reduced, ferric oxide is uniformly distributed between graphene lamellas, graphene lamellar accumulation and ferric oxide particle aggregation are reduced, the preparation process is simple, the requirement for equipment is low, and the preparation method is suitable for industrial or laboratory operation and has huge application prospects.

Description

technical field [0001] The invention relates to the field of preparation of ferric oxide / wrinkled graphene film material. Background technique [0002] The negative electrode of lithium-ion batteries mostly uses carbon materials as electrode materials for commercial use, which has the disadvantage of low specific capacity. Iron oxide has become a research hotspot due to its high theoretical specific capacity, high charge-discharge voltage platform, wide range of sources, low cost, non-toxicity, and environmental friendliness. Since iron oxide is non-conductive and used as an electrode material for lithium-ion batteries, it will have a more serious volume effect during charge and discharge, resulting in rapid capacity decay. Combining iron oxide and graphene, on the one hand, the good conductivity of graphene is used to make up for the non-conductive shortcomings of iron oxide, and on the other hand, graphene is usually used as a skeleton to alleviate the volume effect of ir...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M4/62H01M10/0525C01B32/19C01G49/06
CPCC01B32/19C01G49/06C01P2004/80H01M4/523H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 苗中正张立云吴帅
Owner YANCHENG TEACHERS UNIV
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