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Supercapacitor based on graphene/carbon nanotube composite fabric electrode and its preparation

A carbon nanotube composite and supercapacitor technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of no flexible supercapacitors, achieve excellent stretchability, promote transmission, and good light transmission sexual effect

Active Publication Date: 2019-01-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the reported supercapacitors based on covalently linked graphene / carbon nanotube composites are planar structures, and there are no related reports on flexible supercapacitors based on fabric-like covalently linked graphene / carbon nanotube composites.

Method used

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  • Supercapacitor based on graphene/carbon nanotube composite fabric electrode and its preparation
  • Supercapacitor based on graphene/carbon nanotube composite fabric electrode and its preparation
  • Supercapacitor based on graphene/carbon nanotube composite fabric electrode and its preparation

Examples

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Effect test

Embodiment 1

[0032] A method for preparing a transparent and stretchable supercapacitor based on a covalently connected graphene / carbon nanotube composite fabric electrode, the specific steps are as follows:

[0033] (1): Cut the nickel mesh into a size of 1cm×2.5cm, ultrasonically clean it with acetone for about 20 minutes, then wash it with deionized water and ethanol three times and dry it naturally.

[0034] (2): Put the cleaned nickel mesh into the tube furnace, then pass in argon gas (400sccm), and pass in hydrogen gas (80sccm) when the temperature in the furnace rises to 500°C; when the temperature rises to 1000°C, keep After 10 minutes, methane (60 sccm) was introduced; after ten minutes of growth, the hydrogen and methane valves were closed, and the furnace cover was opened immediately. Take out the sample when the temperature drops below 200°C.

[0035] (3): Catalyst (iron) and buffer layer (aluminum sesquioxide) are respectively plated on both sides of the nickel mesh grown wit...

Embodiment 2

[0042] A method for preparing a transparent and stretchable supercapacitor based on a covalently connected graphene / carbon nanotube composite fabric electrode, the specific steps are as follows:

[0043] (1): Cut the nickel mesh into a size of 1cm×2.5cm, ultrasonically clean it with acetone for about 20 minutes, then wash it with deionized water and ethanol three times and dry it naturally.

[0044] (2): Put the cleaned nickel mesh into the tube furnace, then pass in argon gas (420sccm), and pass in hydrogen gas (90sccm) when the temperature in the furnace rises to 500°C; when the temperature rises to 1000°C, keep After 10 minutes, methane (80 sccm) was introduced; after ten minutes of growth, the hydrogen and methane valves were closed, and the furnace cover was opened immediately. Take out the sample when the temperature drops below 200°C.

[0045] (3): Catalyst (iron) and buffer layer (aluminum sesquioxide) were respectively plated on both sides of the nickel mesh grown wi...

Embodiment 3

[0052] A method for preparing a transparent and stretchable supercapacitor based on a covalently connected graphene / carbon nanotube composite fabric electrode, the specific steps are as follows:

[0053] (1): Cut the nickel mesh into a size of 1cm×2.5cm, ultrasonically clean it with acetone for about 20 minutes, then wash it with deionized water and ethanol three times and dry it naturally.

[0054] (2): Put the cleaned nickel mesh into the tube furnace, then pass in argon gas (380sccm), and pass in hydrogen gas (75sccm) when the temperature in the furnace rises to 500°C; when the temperature rises to 1000°C, keep Methane (50 sccm) was introduced after 10 minutes; the hydrogen and methane valves were closed after ten minutes of growth, and the furnace cover was opened immediately. Take out the sample when the temperature drops below 200°C.

[0055] (3): Catalyst (iron) and buffer layer (aluminum oxide) were respectively plated on both sides of the nickel mesh grown with graph...

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Abstract

The invention relates to a supercapacitor based on graphene / carbon nanotube composite fabric electrode and preparation thereof, The supercapacitor comprises a fabric electrode, a substrate and a gel electrolyte, wherein a graphene layer in the fabric electrode and carbon nanotubes are connected through covalent bonds, and a single fiber in the fabric has a unique tubular structure due to the covalent connection mode of the graphene / carbon nanotubes, and can perform various functions inside and outside the tubes. Compared with the prior art, the invention further grows the conductive polymer polyaniline inside and outside the tube, and is used for preparing the flexible, transparent and stretchable all-solid-state supercapacitor, and the stretchability of the device reaches 200% and the light transmittance is 46%. The covalently connected graphene / carbon nanotube fabric electrode of the invention has wide application value in the field of flexible electronic devices; The flexible, transparent and stretchable supercapacitor has great application prospect in the field of portable wearable devices.

Description

technical field [0001] The invention relates to the technical field of wearable energy storage devices, in particular to a supercapacitor based on a graphene / carbon nanotube composite fabric electrode and its preparation. Background technique [0002] With the vigorous development of wearable electronic devices in the fields of displays, sensors, and health management, flexible wearable energy storage devices based on fabric electrode structures have attracted extensive attention due to their excellent flexibility and weavability. Fabric-like supercapacitors are currently a research hotspot in flexible and wearable energy storage devices due to their ultra-high power density, long cycle life, and ultra-high safety. [0003] Carbon nanotubes and graphene have excellent electrical, thermal and mechanical properties and large specific surface area, and are widely used as electrode materials for flexible and wearable supercapacitors. However, both carbon nanotubes and graphene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/36H01G11/48H01G11/84H01G11/86
CPCH01G11/26H01G11/30H01G11/36H01G11/48H01G11/84H01G11/86Y02E60/13
Inventor 陈涛刘开姚瑶
Owner TONGJI UNIV