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Three-dimensional material, preparation method thereof and electrode for supercapacitor

A three-dimensional, three-dimensional porous technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of easy agglomeration, affecting the increase of specific capacitance value, affecting the contact area of ​​electrolyte, etc.

Active Publication Date: 2018-04-24
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The electrode materials commonly used in the prior art usually have the following characteristics: the active material itself or the supported matrix has a large specific surface area, but such materials are often prone to agglomeration, which greatly affects the contact area with the electrolyte and affects the Further improvement in specific capacitance value

Method used

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  • Three-dimensional material, preparation method thereof and electrode for supercapacitor
  • Three-dimensional material, preparation method thereof and electrode for supercapacitor
  • Three-dimensional material, preparation method thereof and electrode for supercapacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Put 5g of molybdenum disulfide powder in 50ml of nitrogen-methylpyrrolidone (NMP), ball mill for 3h to obtain a 100mg / ml mixed solution, and treat the mixed solution at 20°C for 6h at an ultrasonic frequency of 50Hz to obtain 100mg / ml of molybdenum disulfide Molybdenum in NMP dispersion.

[0082] Centrifuge the above NMP dispersion of molybdenum disulfide at a speed of 2000rpm for 30min, take out 4 / 5 of the supernatant, and centrifuge the taken out supernatant at a speed of 11000rpm for 30min, take the bottom sediment and wash it with ethanol for 3 times , to obtain the ethanol dispersion of molybdenum disulfide nanolayer.

[0083] The ethanol dispersion of the molybdenum disulfide nanolayer was treated in a vacuum oven at 70° C. for 12 hours to obtain a dried molybdenum disulfide nanolayer.

[0084] The above-mentioned molybdenum disulfide nanolayer and carbon nanofiber are dissolved in ultrapure water at a weight ratio of 1:1 to form a mixed solution. The mixed solu...

Embodiment 2

[0092] Put 6g of molybdenum disulfide powder in 120ml of nitrogen-methylpyrrolidone (NMP), ball mill for 4 hours to obtain a 50mg / ml mixed solution, and treat the mixed solution at 25°C for 4 hours under the condition of an ultrasonic frequency of 60Hz to obtain 50mg / ml of molybdenum disulfide Molybdenum in NMP dispersion.

[0093] Centrifuge the above NMP dispersion of molybdenum disulfide at a speed of 3000rpm for 20min, take out 3 / 4 of the supernatant, and centrifuge the taken out supernatant at a speed of 10000rpm for 40min, take the bottom sediment and wash it with ethanol for 4 times , to obtain the ethanol dispersion of molybdenum disulfide nanolayer.

[0094] The ethanol dispersion of the molybdenum disulfide nanolayer was treated in a vacuum oven at 80°C for 15 hours to obtain a dried molybdenum disulfide nanolayer.

[0095] The above-mentioned molybdenum disulfide nanolayer, carbon nanofiber and cobalt tetroxide are dissolved in ultrapure water at a weight ratio of ...

Embodiment 3

[0101] Put 5g of molybdenum disulfide powder in 100ml of nitrogen-methylpyrrolidone (NMP), ball mill for 5h to obtain a 50mg / ml mixed solution, and treat the mixed solution at 20°C for 6h at an ultrasonic frequency of 100Hz to obtain 50mg / ml of molybdenum disulfide Molybdenum in NMP dispersion.

[0102] Centrifuge the above NMP dispersion of molybdenum disulfide at a speed of 4000rpm for 25min, take out 3 / 4 of the supernatant, and centrifuge the taken out supernatant at a speed of 10500rpm for 35min, take the bottom sediment and wash it with ethanol for 5 times , to obtain the ethanol dispersion of molybdenum disulfide nanolayer.

[0103] The ethanol dispersion of the molybdenum disulfide nano-layer was treated in a vacuum oven at 90° C. for 24 hours to obtain a dried molybdenum disulfide nano-layer.

[0104] The above-mentioned molybdenum disulfide nanolayer, carbon nanofiber, manganese dioxide and reduced graphene oxide are dissolved in ultrapure water at a weight ratio of ...

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Abstract

The invention discloses a three-dimensional material, a preparation method thereof, and an electrode utilizing the three-dimensional material and used for a supercapacitor. The three-dimensional material is a porous compound of a three-dimensional spatial structure, wherein the porous compound comprises a framework and a flake-like substance having a thickness of 1-20 nm and attached onto the framework. The preparation method of the three-dimensional material comprises the steps of preparing a few layers (1 to 10 layers) of ultra-thin flake-like substances, and subjecting the ultra-thin flake-like substances with a framework precursor and an optional auxiliary filler to mixing, freeze-drying, thermal treatment and the like. The electrode used for the supercapacitor and prepared by pressingthe three-dimensional material has the advantages of high specific capacitance, excellent energy and power densities, good cycle performance and low price, and has great potential for application infields such as electronic communications and mobile equipment.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and relates to a three-dimensional material, its preparation method and application, in particular to a three-dimensional material, its preparation method and its application in supercapacitor electrodes. Background technique [0002] With the outbreak of the energy crisis and the intensification of environmental pollution worldwide, the society's requirements for energy conservation and environmental protection are also getting higher and higher. Therefore, governments at all levels in various countries are sparing no effort to find a way out in the research and development of new renewable clean energy. Today, human beings have completed the development or are in the research stage of environmental protection energy is rich and diverse. These include solar, wind, nuclear, tidal, hydrogen, and more. In order to make rational and effective use of these new energy sources, energy storage...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/86
CPCH01G11/24H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 于淑会王超罗遂斌符显珠孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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