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Preparation method for hexagonal manganese dioxide nanosheet material and application of hexagonal manganese dioxide nanosheet material as electrode material of supercapacitor

A supercapacitor, manganese dioxide technology, applied in the field of nanomaterials and electrochemical materials

Inactive Publication Date: 2015-03-11
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to produce electricity more efficiently and cleanly, and how to store and use electricity more conveniently is a challenge to the scientific and technological circles, as well as a challenge to electrochemistry.

Method used

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  • Preparation method for hexagonal manganese dioxide nanosheet material and application of hexagonal manganese dioxide nanosheet material as electrode material of supercapacitor
  • Preparation method for hexagonal manganese dioxide nanosheet material and application of hexagonal manganese dioxide nanosheet material as electrode material of supercapacitor
  • Preparation method for hexagonal manganese dioxide nanosheet material and application of hexagonal manganese dioxide nanosheet material as electrode material of supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Hexagonal manganese dioxide (MnO 2) Preparation of nanosheet material: 1.264g of potassium permanganate was dissolved in 100ml of distilled water to form a potassium permanganate aqueous solution; then 1g of potato starch was dispersed in 100mL of potassium permanganate aqueous solution and magnetically stirred for 5 hours to obtain a mixed solution. Then use KOH solution to adjust the pH value of the mixed solution to 9~10, move it to a high-pressure reactor, and heat it in water at 180°C for 24 hours; after cooling to room temperature, filter it with suction, and wash it repeatedly with absolute ethanol and distilled water until neutral. Vacuum drying at 60°C for 12 hours to obtain flaky hexagonal manganese dioxide;

[0034] (2) Hexagonal manganese dioxide (MnO 2 ) Preparation of nanosheet material electrode: 5.88 mg of mixed solid powder of manganese dioxide nanosheet material and acetylene black (85% and 15% by mass respectively) were uniformly dispersed in 1mL...

Embodiment 2

[0037] (1) Hexagonal manganese dioxide (MnO 2 ) Preparation of nanosheet material: 1.5g of potassium permanganate was dissolved in 100mL of distilled water to form potassium permanganate aqueous solution; then 1g of potato starch was dispersed in 100mL of potassium permanganate aqueous solution, and magnetically stirred for 6 hours to obtain a mixed solution. Then use KOH solution to adjust the pH value of the mixed solution to 9~10, move it to a high-pressure reactor, and heat it in water at 185°C for 24 hours; after cooling to room temperature, filter it with suction, and wash it repeatedly with absolute ethanol and distilled water until neutral. Vacuum drying at 60°C for 12 hours to obtain flaky hexagonal manganese dioxide;

[0038] (2) Hexagonal manganese dioxide (MnO 2 ) Preparation of nanosheet material: 5.9 mg of mixed solid powder of manganese dioxide nanosheet material and acetylene black (85% and 15% by mass, respectively) were uniformly dispersed in 1mL Nafion solu...

Embodiment 3

[0041] (1) Hexagonal manganese dioxide (MnO 2 ) Preparation of nanosheet material: Dissolve 1.6g potassium manganate in 100ml distilled water to form potassium permanganate aqueous solution; then disperse 0.8g potato starch in 100ml potassium permanganate aqueous solution, stir magnetically for 6h to obtain a mixed solution . Then use KOH solution to adjust the pH value of the mixed solution to 9~10, move it to a high-pressure reactor, and heat it in water at 185°C for 12 hours; after cooling to room temperature, filter it with suction, and wash it repeatedly with absolute ethanol and distilled water until neutral. Vacuum drying at 60°C for 12 hours to obtain flaky hexagonal manganese dioxide;

[0042] (2) Hexagonal manganese dioxide (MnO 2 ) Preparation of nanosheet material: 5.8 mg of mixed solid powder of manganese dioxide nanosheet material and acetylene black (85% and 15% by mass respectively) were uniformly dispersed in 1mL Nafion solution, ultrasonicated for 50min, an...

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Abstract

The invention discloses a preparation method for a hexagonal manganese dioxide (MnO2) nanosheet material. The preparation method comprises the following steps of with potato starch and potassium permanganate (KMnO4) as initial raw materials, obtaining a hexagonal MnO2 nanosheet material precursor through hydrothermal reaction; performing washing and vacuum drying on the precursor to obtain a finish product. Showed by an electrochemical performance test, the hexagonal MnO2 nanosheet material prepared by the preparation method disclosed by the invention shows high electrochemical capacitance behavior and excellent double capacity rate, so the hexagonal MnO2 nanosheet material can be used as the electrode material of the supercapacitor. In addition, the preparation method for the hexagonal MnO2 nanosheet material, disclosed by the invention, has the characteristics of simple process, stable technique, good easiness for operation, reliable quality, low cost, renewability, no pollution and the like, and meets basic requirements of commercialization when the hexagonal MnO2 nanosheet material is used as the electrode material of the supercapacitor.

Description

technical field [0001] The present invention relates to a preparation method of manganese dioxide nanomaterials, in particular to a preparation method of hexagonal manganese dioxide nanosheet materials; the present invention also relates to the use of the hexagonal nanosheet materials as electrode materials in the preparation of supercapacitors The application of the invention belongs to the field of nanometer materials and the field of electrochemical materials. Background technique [0002] Under the condition that the world's energy consumption is dominated by oil, oil resources will be exhausted within a generation; although coal resources are more than oil, they are not inexhaustible. Other energy resources that can replace petroleum, except coal, are rarely used on a large scale. Solar energy, while inexhaustible, is too expensive and unlikely to develop rapidly and widely within a generation. As a relatively clean and easy-to-use energy, electric energy is favored b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/46H01G11/86B82Y40/00
CPCY02E60/13H01G11/24B82Y40/00H01G11/46H01G11/86
Inventor 胡中爱强睿斌吴红英杨玉英李志敏安宁
Owner NORTHWEST NORMAL UNIVERSITY
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