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A kind of nano particle sandwich composite material and preparation method thereof

A technology of composite materials and nanoparticles, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems that limit the application of supercapacitors, achieve improved conductivity and storage performance, consistent storage performance, and uniform dispersion Effect

Active Publication Date: 2021-12-17
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional carbon electrode materials in the prior art have been gradually replaced by metal oxide materials, and transition metal oxides in metal oxide materials are the most important electrode materials for pseudocapacitor supercapacitors, because the metal atoms in transition metal oxides It has a variety of valence states, so it has a high theoretical specific capacity, and some cheap metal oxides, such as ZnO, CuO, Co 3 o 4 , NiO, MnO 2 Transition metal oxides such as transition metal oxides have high specific capacity and are non-polluting to the environment. Therefore, transition metal oxides as electrode materials have gradually become a research hotspot. agent and conductive agent, resulting in a cycle performance of only 60%-70%, and a specific capacity of 400F / g-500F / g, which limits its application in the field of supercapacitors

Method used

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  • A kind of nano particle sandwich composite material and preparation method thereof

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Embodiment 1

[0027] A method for preparing a nanoparticle sandwich composite material, comprising the steps of:

[0028] (1) Weighing: weigh according to the following raw material composition: tetramethylene diisocyanate 4g; glycidol 12mL; single-walled carbon nanotubes 0.5g; ZnO 1.5g, set aside;

[0029] (2) Preparation of surface oxidized single-walled carbon nanotubes: Place the single-walled carbon nanotubes weighed in step (1) in an ethanol / acetone solution with a volume ratio of 1:1, reflux for 48 hours, take them out, and place them at 70°C Dry in an oven, weigh at regular intervals, stop drying until the last two weights no longer change, and then combine the single-walled carbon nanotubes with a mass fraction of 68% The concentrated nitric acid solution is mixed, and the volume of the concentrated nitric acid solution is 40mL, and the temperature is 50°C, the ultrasonic power is 200W, and the ultrasonic frequency is 50kHz. The weight of the nanotube no longer changes, and the su...

Embodiment 2

[0034] A method for preparing a nanoparticle sandwich composite material, comprising the steps of:

[0035] (1) Weighing: Weigh according to the following raw material composition: 4.5g of hexamethylene diisocyanate; 16mL of glycidyl alcohol; 0.8g of single-walled carbon nanotubes; 3 o 4 2.5g, spare;

[0036] (2) Preparation of surface-oxidized single-walled carbon nanotubes: Place the single-walled carbon nanotubes weighed in step (1) in an ethanol / acetone solution with a volume ratio of 1:1, reflux for 48 hours, take them out, and place them at 80°C Dry in an oven, weigh at regular intervals, stop drying until the last two weights no longer change, and then combine the single-walled carbon nanotubes with a mass fraction of 68% The concentrated nitric acid solution is mixed, and the volume of the concentrated nitric acid solution is 48mL, and the temperature is 80°C, the ultrasonic power is 200W, and the ultrasonic frequency is 50kHz. The weight of the single-walled carbo...

Embodiment 3

[0041] A method for preparing a nanoparticle sandwich composite material, comprising the steps of:

[0042] (1) Weighing: Weigh according to the following raw material composition: isophorone diisocyanate 5g; glycidol 18mL; single-walled carbon nanotubes 1g; NiO 3.5g, spare;

[0043] (2) Preparation of surface oxidized single-walled carbon nanotubes: Place the single-walled carbon nanotubes weighed in step (1) in an ethanol / acetone solution with a volume ratio of 1:1, take them out after reflux for 48 hours, and place them at 90 Dry in an oven at ℃, weigh at regular intervals, stop drying until the weight of the last two times no longer changes, and then combine the single-walled carbon nanotubes with a mass fraction of 68% after surface purification. The concentrated nitric acid solution is mixed, and the volume of the concentrated nitric acid solution is 50mL, and the temperature is 100°C, the ultrasonic power is 200W, and the ultrasonic frequency is 50kHz. Ultrasonic treatm...

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Abstract

The invention relates to the technical field of nanocomposite materials, in particular to a nanoparticle sandwich composite material and a preparation method thereof, which consists of the following raw materials in parts by weight: 40-50 parts of diisocyanate; alcohol containing epoxy groups 120‑180 parts; 5‑10 parts of single-walled single-walled carbon nanotubes; 15‑35 parts of electrode materials. The present invention oxidizes single-wall carbon nanotubes to obtain oxidized single-wall carbon nanotubes with a large amount of carboxyl groups on the surface. The present invention also prepares polyurethane prepolymers containing epoxy groups, and then combines the polyurethane prepolymers with After the oxidized single-walled carbon nanotubes undergo amidation reaction, the polyurethane prepolymer surrounds the single-walled carbon nanotubes, and then the electrode material is adhered on the polyurethane prepolymer. The present invention uses the polyurethane prepolymer and the single-walled carbon nanotube Carbon nanotubes work together to increase the rate of charge and discharge, and efficient energy storage is achieved through single-walled carbon nanotubes and transition metal oxides.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to a nanoparticle sandwich composite material and a preparation method thereof. Background technique [0002] Supercapacitors are the most promising class of devices for energy storage systems, mainly due to their good performance, such as high energy density, fast charge and discharge speed, and long cycle life. Traditional carbon electrode materials in the prior art have been gradually replaced by metal oxide materials, and transition metal oxides in metal oxide materials are the most important electrode materials for pseudocapacitor supercapacitors, because the metal atoms in transition metal oxides It has a variety of valence states, so it has a high theoretical specific capacity, and some cheap metal oxides, such as ZnO, CuO, Co 3 o 4 , NiO, MnO 2 Transition metal oxides such as transition metal oxides have high specific capacity and are non-polluting to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/46H01G11/36H01G11/26H01G11/86
CPCH01G11/46H01G11/36H01G11/26H01G11/86
Inventor 郭丹吴佳妮
Owner XIAN TECH UNIV
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