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Manganese dioxide/carbon nanocomposite, and preparation method and application thereof

A manganese dioxide, composite material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high temperature, unsuitable for industrial production, high energy consumption, and achieve short time, Wide selection of effects with simple operation

Inactive Publication Date: 2014-08-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the preparation of composite materials by hydrothermal method requires high temperature, high pressure and high energy consumption, which is not suitable for industrial production.

Method used

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  • Manganese dioxide/carbon nanocomposite, and preparation method and application thereof
  • Manganese dioxide/carbon nanocomposite, and preparation method and application thereof
  • Manganese dioxide/carbon nanocomposite, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 15.64mg of hydroxyl-modified multi-walled carbon nanotubes to 50mL of 0.36mmol / L potassium permanganate solution, disperse it by ultrasonication for 30min, then add the mixed solution to 50mL of 0.84mmol / L manganese sulfate solution, Then quickly add 50 mL of 0.01 mol / L sulfuric acid solution, and stir rapidly at room temperature for 1 h. The resulting precipitate was washed with deionized water to neutrality, and vacuum-dried at 65° C. to obtain manganese dioxide flakes grown on carbon nanotubes.

[0039] Such as figure 1 , the XRD spectrum of the product obtained in Example 1 of the present invention and the hydroxyl-modified multi-walled carbon nanotubes, the diffraction peaks at 36.73°, 43.68°, and 65.84° correspond to ε-MnO 2 The (100), (101), (110) crystal planes prove that manganese dioxide has grown on carbon nanotubes.

[0040] Such as figure 2 , Transmission electron micrographs of hydroxyl-modified multi-walled carbon nanotubes, the length of carbon n...

Embodiment 2

[0046] Carbon carrier selection: Add 15.64mg of carbon black (Ketjen black EC-600J) to 50mL of 0.36mmol / L potassium permanganate solution, ultrasonically disperse it for 30min, and then add the mixture to 50mL of 0.84mmol / L To the manganese sulfate solution, quickly add 50mL of 0.01mol / L sulfuric acid solution, and stir rapidly at room temperature for 1h. The resulting precipitate was washed to neutral with deionized water, and vacuum-dried at 65°C to obtain manganese dioxide flakes grown on EC-600J carbon black.

Embodiment 3

[0048] Temperature selection 60°C: Add 10.59g of hydroxyl-modified multi-walled carbon nanotubes to 50mL of 649.35mmol / L potassium permanganate solution, ultrasonically disperse it for 30min, and then add the mixture to 50mL of 1500mmol / L In the manganese sulfate solution, quickly add 50 mL of 0.01 mol / L sulfuric acid solution, reflux at 60 ° C, and stir rapidly for 1 h. The obtained precipitate was washed with deionized water to neutrality, and vacuum-dried at 65° C. to obtain manganese dioxide flakes grown on carbon nanotubes.

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Abstract

The invention provides a manganese dioxide / carbon nanocomposite and a preparation method and application thereof. The preparation method comprises the following concrete steps: mixing an aqueous solution of permanganate, a carbon carrier and an aqueous solution of a divalent manganese salt; carrying out a reaction to produce a precipitate; and carrying out washing and drying so as to obtain the manganese dioxide / carbon nanocomposite. The preparation method has the advantages of easiness, rapidness, environment friendliness and easy realization of scale-up synthesis. The prepared manganese dioxide / carbon nanocomposite is applicable to a super-capacitor, a metal-air battery and a fuel battery.

Description

technical field [0001] The invention belongs to the field of electrocatalysts and electrode materials, and in particular relates to a manganese dioxide / carbon nanocomposite material and its preparation method and application. Background technique [0002] Manganese dioxide is cheap, environmentally friendly, has abundant reserves, and has a high theoretical capacitance value similar to that of ruthenium dioxide. It has been widely used as a catalyst, electrocatalyst and electrode material. However, the poor conductivity of manganese dioxide limits its application in the field of electrochemistry. Since the carbon material has good electrical conductivity and stability, it can be used as a carrier to compound with manganese dioxide. Manganese dioxide / carbon nanocomposites have good electrical conductivity, chemical stability, high active area and high specific capacitance, and are widely used in the field of electrochemistry. A variety of methods for preparing manganese dio...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01G9/042B82Y30/00B82Y40/00
CPCY02E60/50Y02E60/13B82Y30/00B82Y40/00H01G11/30H01G11/46H01M4/9016H01M4/9083
Inventor 宋玉江吕洋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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