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Porous carbon nanorod array electrode and preparation method thereof

A nanorod array and array electrode technology, applied in the field of carbon nanorod array electrodes and their preparation, can solve the problems of low conductivity, easy agglomeration, easy winding and the like, and achieve the effects of large specific surface area, high application value and uniform diameter

Active Publication Date: 2015-06-17
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​carbon nanotubes is not large enough (generally 2 / g), and are easily entangled with each other, which hinders the rapid transfer of ions; for graphene with a 2D structure, although it has a very high theoretical specific surface area and conductivity, in the process of preparing electrodes, the 2D of graphene The lamella structure is very easy to agglomerate, which greatly reduces the utilization rate of the specific surface area; while the general 3D carbon materials (activated carbon, carbon obtained by carbonization process or template method) have a high enough specific surface area, but there are a large number of microparticles. Pores and relatively low conductivity, the specific capacitance is not ideal under the condition of high current density

Method used

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  • Porous carbon nanorod array electrode and preparation method thereof
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  • Porous carbon nanorod array electrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Weigh 0.5g of zinc nitrate and dissolve it in 50mL of deionized water. After fully dissolving, add 1.78g of ammonia water dropwise under the action of magnetic stirring, pour the reaction solution into a polytetrafluoroethylene liner, and put a piece of 2cm×4cm Titanium sheet, after being sealed with a stainless steel jacket, keep warm in an oven at 70°C for 1000 minutes;

[0032] 2. Take out the titanium sheet, rinse it with deionized water and absolute ethanol, put the titanium sheet grown with the zinc oxide nanowire array precursor into a horizontal quartz tube to heat, the nitrogen flow rate is 100 sccm, the pressure is atmospheric pressure, use 96 The temperature was raised to 500°C in 1 minute, and then annealed for 0.5 hours while maintaining the temperature of 500°C and the nitrogen flow rate;

[0033] 3. Keep the nitrogen flow rate constant and continue to raise the temperature. The heating rate is 10°C / min. When it rises to 750°C, hydrogen gas is introduce...

Embodiment 2

[0039] 1. Weigh 0.5g of zinc nitrate and dissolve it in 50mL of deionized water. After fully dissolving, add 1.78g of ammonia water dropwise under the action of magnetic stirring, pour the reaction solution into a polytetrafluoroethylene liner, and put a piece of 2cm×4cm Titanium sheet, after being sealed with a stainless steel jacket, keep warm in an oven at 70°C for 800 minutes;

[0040]2. Take out the titanium sheet, rinse it with deionized water and absolute ethanol, put the titanium sheet grown with the zinc oxide nanowire array precursor into a horizontal quartz tube to heat, the nitrogen flow rate is 80 sccm, the pressure is atmospheric pressure, use 96 The temperature was raised to 500°C in 1 minute, and then annealed for 0.5 hours while maintaining the temperature of 500°C and the nitrogen flow rate;

[0041] 3. Keep the nitrogen flow rate constant and continue to raise the temperature at a rate of 10°C / min to 720°C. Introduce hydrogen with a hydrogen flow rate of 40...

Embodiment 3

[0043] 1. Weigh 0.5g of zinc nitrate and dissolve it in 50mL of deionized water. After fully dissolving, drop 2.225g of ammonia water under the action of magnetic stirring, pour the reaction solution into a polytetrafluoroethylene liner, and put a piece of 2cm×4cm Titanium sheet, after being sealed with a stainless steel jacket, keep warm in an oven at 70°C for 1000 minutes;

[0044] 2. Take out the titanium sheet, rinse it with deionized water and absolute ethanol and dry it; put the titanium sheet grown with the zinc oxide nanowire array precursor into a horizontal quartz tube to heat, the nitrogen flow rate is 100 sccm, and the pressure is atmospheric pressure , it takes 86 minutes to raise the temperature to 450°C, and then keep the temperature of 450°C and the nitrogen flow rate constant for annealing for 0.5 hours;

[0045] 3. Keep the nitrogen flow rate constant and continue to raise the temperature. The heating rate is 10°C / min. When it rises to 700°C, hydrogen gas is ...

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Abstract

The invention discloses a porous carbon nanorod array electrode and a preparation method thereof. A zinc oxide nanowire array is used as a template, hydrocarbon gas is used as a carbon source, and an in-situ CVD method is used for manufacturing a carbon nanorod array. The surface of the carbon nanorod array is of a porous structure, the array length is 2.5-4 microns, and the diameter of the array is 50-200 nm. The carbon nanorod array is of a one-dimensional array structure so as to be beneficial to transmitting charges, the surface of the carbon nanorod array is of the porous structure, the large specific surface area is achieved, and the carbon nanorod array electrode can be used as a supercapacitor electrode.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to a carbon nanorod array electrode with a porous surface and a preparation method thereof. Background technique [0002] Supercapacitor is a new type of green energy storage device. Due to its high power density and long cycle life, it plays an important role in transportation, mobile communication, aerospace and other fields. However, the lower energy density compared with Li-ion batteries limits their large-scale use. According to the energy density calculation formula E=0.5CV 2 , the energy density can be improved by increasing the specific capacitance and working voltage of the capacitor. Among them, the specific capacitance is closely related to the electrode material used. Among all kinds of electrode materials, carbon materials are particularly valued due to their good electrical conductivity, wide range of sources, safety and non-toxicity. And activated carbon, carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/36H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13H01G11/26B82Y30/00B82Y40/00H01G11/36H01G11/86
Inventor 肖婷谭新玉向鹏姜礼华
Owner CHINA THREE GORGES UNIV
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