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Preparation method and application of arrayed carbon nanotube foam metal composite substrate

A carbon nanotube and metal foam technology, which is applied in metal material coating process, hybrid capacitor current collector, electrochemical generator, etc. Increases cyclic stability, facilitates release, maintains structural integrity

Active Publication Date: 2019-06-11
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the preparation and use of electrode devices, the array structure of arrayed carbon nanotubes is easily damaged, so that the above advantages cannot be fully utilized, which limits its further application in the energy field.

Method used

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  • Preparation method and application of arrayed carbon nanotube foam metal composite substrate
  • Preparation method and application of arrayed carbon nanotube foam metal composite substrate
  • Preparation method and application of arrayed carbon nanotube foam metal composite substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Select foamed nickel with a porosity of 95% and a pore size of 6mm (thickness 1.4mm). Use 1M HCl to soak the foamed nickel substrate at room temperature for 1 hour to remove surface oxides. The size of the foamed nickel material is 0.5*3 cm 2 , after washing with deionized water, put it into a vacuum drying oven to dry for later use;

[0048] 2. Using Fe, Ni catalyst, CH 4 As the reaction gas, the reaction temperature was 700°C, and the reaction time was 20 minutes. The arrayed carbon nanotubes with a height of 2000 μm and a diameter of 20 nm were grown by chemical vapor deposition, and the arrayed carbon nanotubes were subjected to plasma etching at 18W for 20s in an oxygen atmosphere. Flow 200 mL / min;

[0049] 3. Place the arrayed carbon nanotubes obtained in step 2 vertically above the nickel foam obtained after cleaning in step 1, place the two in the middle of the tablet press, and then perform 40MPa pressure treatment for 1min. Schematic diagram of the compos...

Embodiment 2

[0053] 1. Select foamed nickel with a porosity of 90% and a pore size of 0.2 mm (thickness 0.5 mm), use 1M HCl to soak the foamed nickel substrate at room temperature for 1 hour to remove surface oxides, and the size of the foamed nickel material is 0.5*3 cm 2 , after washing with deionized water, put it into a vacuum drying oven to dry for later use;

[0054] 2. Using Fe, Ni catalyst, CH 4 As the reaction gas, the reaction temperature was 700°C, and the reaction time was 12 minutes. The arrayed carbon nanotubes with a height of 800 μm and a diameter of 2 nm were grown by chemical vapor deposition, and the arrayed carbon nanotubes were etched with plasma at 50W for 20s in an air atmosphere. Gas flow rate 300 mL / min;

[0055] 3. Place the arrayed carbon nanotubes obtained in step 2 vertically above the nickel foam obtained after cleaning in step 1, place the two in the middle of the tablet press, and then perform a 1MPa pressure treatment for 1min to obtain an array composite ...

Embodiment 3

[0061] 1. Choose nickel foam with a porosity of 90% and a pore size of 0.15mm (thickness 0.1mm). Use 1M HCl to soak the nickel foam substrate at room temperature for 1 hour to remove surface oxides. The size of the nickel foam material is 0.5*3 cm 2 , after washing with deionized water, put it into a vacuum drying oven to dry for later use;

[0062] 2. Using Fe, Ni catalyst, CH 4 As the reaction gas, the reaction temperature was 700°C, and the reaction time was 5 minutes. The arrayed carbon nanotubes with a height of 150 μm and a diameter of 20 nm were grown by chemical vapor deposition, and the arrayed carbon nanotubes were plasma-etched for 1W 100s in an air atmosphere. Gas flow rate 100 mL / min;

[0063] 3. Place the arrayed carbon nanotubes obtained in step 2 vertically above the nickel foam obtained after cleaning in step 1, place the two in the middle of the tablet press, and then perform 10MPa pressure treatment for 1min.

[0064] 4. Using the platinum electrode as the...

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Abstract

The invention discloses a preparing method and application of an array carbon nanotube foam metal composite substrate, and belongs to the technical field of functional materials. The preparing methodspecifically comprises the steps that array carbon nanotubes grow, plasma treatment is conducted on the surfaces of the array carbon nanotubes, the foam metal substrate is cleaned up, appropriate positive pressure is exerted by using a tablet press to mechanically composite the array carbon nanotubes and foam metal, and the array carbon nanotube foam metal composite substrate is obtained. Comparedwith a traditional energy storage device electrode materials such as foam metal, the carbon nanotube composite substrate prepared by the method greatly increases the specific surface area of an electrode, solves the problems such as poor contact between an active material and a conductive network and the active material easy to fall off caused by non-firm adhesion, increases the structure stability and flexibility of an electrode system, meanwhile, improves the impact resistance and safety of the electrode. The prepared array carbon nanotube foam metal composite substrate is used in the fieldof supercapacitors, and the prepared electrode has ultra-high cyclic stability.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a method for preparing an arrayed carbon nanotube foam metal composite substrate and the application of the composite substrate in energy devices. Background technique [0002] In the application of energy storage devices, metal foam is often used as an electrode substrate because of its low density, high porosity, and large specific surface area; its network structure can provide good conductivity and support for active materials, and its open pores The three-dimensional structure can serve as electrolyte channel, which is beneficial to ion transport. However, the traditional metal foam has poor hydrophilicity, so that the active material adhering to it cannot fully react with the electrolyte flowing in the gap, resulting in a low electrode capacity. In the process of preparation and use of the electrode device, due to insufficient adhesion strength between the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/26C23C16/56H01M8/0234H01M8/0245H01M4/66H01G11/68
CPCY02E60/10Y02E60/13Y02E60/50
Inventor 徐鸣高翔
Owner HUAZHONG UNIV OF SCI & TECH
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