Graphene and manganous-manganic oxide composite material and preparation method thereof

A trimanganese tetraoxide composite material and graphene technology, which is applied in the manufacture of manganese oxide/manganese hydroxide, hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as unretrieved patents, and achieve convenient operation, The effect of simple process

Active Publication Date: 2016-02-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] No patents identical to a graphene / manganese tetraoxide composite material and its preparation method were found

Method used

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  • Graphene and manganous-manganic oxide composite material and preparation method thereof
  • Graphene and manganous-manganic oxide composite material and preparation method thereof
  • Graphene and manganous-manganic oxide composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of graphene / trimanganese tetraoxide composite material, comprising the following steps:

[0035] 1) Mix 1g graphite powder with 23mL concentrated H 2 SO 4 (mass concentration is 98wt%, the same below) mixed, stirred at room temperature for 24 hours;

[0036]2) Add 100mg of sodium nitrate in a water bath at 40°C and stir for 5 minutes, then slowly add 1.5g of potassium permanganate in a water bath at less than 5°C and stir for 30 minutes;

[0037] 3) Slowly add 3 mL of distilled water twice, wait for 5 minutes, then add 40 mL of distilled water, raise the temperature to 90°C and stir for 15 minutes;

[0038] 4) Stop the water bath, add 140mL distilled water and 10mL hydrogen peroxide, and stir for 5 minutes to terminate the reaction;

[0039] 5) Use a centrifuge at 7500r / min for 3min, wash with a dilute HCl solution with a mass fraction of 5%, repeat twice, then use a centrifuge at 8000r / min for 3min, wash with distilled water three times until ne...

Embodiment 2

[0052] A preparation method of graphene / trimanganese tetraoxide composite material, comprising the following steps:

[0053] 1) Mix 1g graphite powder with 23mL concentrated H 2 SO 4 Mix and stir at room temperature for 24 hours;

[0054] 2) Add 100mg of sodium nitrate in a water bath at 40°C and stir for 5 minutes, then slowly add 1.5g of potassium permanganate in a water bath at less than 5°C and stir for 30 minutes;

[0055] 3) Slowly add 3 mL of distilled water twice, wait for 5 minutes, then add 40 mL of distilled water, raise the temperature to 90°C and stir for 15 minutes;

[0056] 4) Stop the water bath, add 140mL distilled water and 10mL hydrogen peroxide, and stir for 5 minutes to terminate the reaction;

[0057] 5) Use a centrifuge at 7500r / min for 3min, wash with a dilute HCl solution with a mass fraction of 5%, repeat twice, then use a centrifuge at 8000r / min for 3min, wash with distilled water three times until neutral;

[0058] 6) Disperse the precipitate in...

Embodiment 3

[0067] A preparation method of graphene / trimanganese tetraoxide composite material, comprising the following steps:

[0068] 1) Mix 1g graphite powder with 23mL concentrated H 2 SO 4 Mix and stir at room temperature for 24 hours;

[0069] 2) Add 100mg of sodium nitrate in a water bath at 40°C and stir for 5 minutes, then slowly add 1.5g of potassium permanganate in a water bath at less than 5°C and stir for 30 minutes;

[0070] 3) Slowly add 3 mL of distilled water twice, wait for 5 minutes, then add 40 mL of distilled water, raise the temperature to 90°C and stir for 15 minutes;

[0071] 4) Stop the water bath, add 140mL distilled water and 10mL hydrogen peroxide, and stir for 5 minutes to terminate the reaction;

[0072] 5) Use a centrifuge at 7500r / min for 3min, wash with a dilute HCl solution with a mass fraction of 5%, repeat twice, then use a centrifuge at 8000r / min for 3min, wash with distilled water three times until neutral;

[0073] 6) Disperse the precipitate in...

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Abstract

The invention relates to a graphene and manganous-manganic oxide composite material and a preparation method thereof. The graphene and manganous-manganic oxide composite material is characterized in that graphite powder, concentrated sulfuric acid, sodium nitrate, potassium permanganate and manganese acetate tetrahydrate are used as matrix materials, the advanced Hummers' method is adopted for preparing oxidized graphene, and a solvothermal method is adopted for further preparing the graphene and manganous-manganic oxide composite material. The preparation method comprises the steps that 1-2 g of the graphite powder and 20-40 mL of the concentrated sulfuric acid are mixed, 100-200 mg of the sodium nitrate is added into the mixture, stirring is performed, a water bath is performed, 1-3 g of the potassium permanganate is added, the oxidized graphene dispersion liquid of the concentration being 4.00-5.00 mg/mL is dispersed in an ethyl alcohol-water mixed solvent, the mass ratio of the oxidized graphene to the manganese acetate tetrahydrate is 1:1-1:30, and then a reaction is performed for 8-12 h at the temperature of 160-200 DEG C. The method is easy to operate and low in cost, has no special requirement for equipment, and can be applied in the fields of supercapacitors, batteries, automobiles, military facilities and the like.

Description

technical field [0001] The invention relates to the field of graphene composite materials, in particular to a graphene / trimanganese tetraoxide composite material (hydrogel and solid state) and a preparation method thereof. Background technique [0002] In recent years, with the increasing shortage of petroleum resources and the rapid expansion of energy demand, it is imminent to develop a clean device with high energy storage density. Compared with traditional capacitors and batteries, supercapacitors are widely used in automobiles, military facilities, electrical appliances and other fields due to their advantages such as high energy density, high power density, and long cycle life. Electrode materials are the decisive factors affecting the performance of supercapacitors, which can be divided into three categories: carbon materials, metal oxide materials and conductive polymer materials. Although carbon materials have a large specific surface area and good conductivity, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01G45/02H01G11/46H01G11/36H01G11/86
CPCY02E60/13C01G45/02H01G11/36H01G11/46H01G11/86
Inventor 李宏龙羽婷谢君樑
Owner WUHAN UNIV OF TECH
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