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Graphene-carbon nanotube composite film material and preparation method and application thereof

A carbon nanotube composite and carbon nanotube film technology, which is applied in the field of graphene-carbon nanotube composite film materials and its preparation, can solve the problems of increasing furnace energy consumption, high energy consumption, and time-consuming production processes

Inactive Publication Date: 2021-08-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the highest conductivity obtained by conventional heat treatment is only 1000 S / cm
Traditional heat treatment requires long-term, high-energy, high-temperature treatment, which will inevitably increase the demand for furnace body and energy consumption
In addition, lengthy, time-consuming production processes reduce product yield and production efficiency
Therefore, the application of graphene in flexible aqueous Al-ion batteries is limited by low electrical conductivity, high energy consumption, and lack of rapid fabrication methods.

Method used

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  • Graphene-carbon nanotube composite film material and preparation method and application thereof
  • Graphene-carbon nanotube composite film material and preparation method and application thereof

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Embodiment 1

[0036] The preparation of graphene-carbon nanotube composite film material is carried out according to the following steps:

[0037] Step 1, preparation of GO-CNT: add 100mg single-walled carbon nanotubes into 200mL ethanol, after 30s ultrasonic treatment, get 0.5mg / mL carbon nanotube (CNT) ink, add 100mg graphene oxide (GO) Ink (3mg / mL) and carbon nanotube (CNT) ink are mixed and sonicated according to the CNT concentration of 15wt%, to obtain a graphene-carbon nanotube (GO-CNT) mixed solution, and the obtained graphene-carbon nanotube The mixed solution of tube (GO-CNT) was evenly dropped onto the Teflon plate cleaned by ethanol, so that the mixed solution was evenly spread on the entire Teflon plate, and then the above-mentioned Teflon plate was placed at room temperature (20-25°C) ) to dry naturally to obtain graphene oxide-carbon nanotube composite film material (GO-CNT);

[0038] Step 2, Joule heating process: the graphene oxide-carbon nanotube film material (GO-CNT) is...

Embodiment 2

[0041] The preparation of graphene-carbon nanotube composite film material is carried out according to the following steps:

[0042] Step 1, preparation of GO-CNT: add 100mg single-walled carbon nanotubes into 200mL ethanol, after 30s ultrasonic treatment, get 0.5mg / mL carbon nanotube (CNT) ink, add 100mg graphene oxide (GO) Ink (3mg / mL) and carbon nanotube (CNT) ink are mixed and sonicated according to the CNT concentration of 15wt%, to obtain a graphene-carbon nanotube (GO-CNT) mixed solution, and the obtained graphene-carbon nanotube The mixed solution of tube (GO-CNT) was evenly dropped onto the Teflon plate cleaned by ethanol, so that the mixed solution was evenly spread on the entire Teflon plate, and then the above-mentioned Teflon plate was placed at room temperature (20-25°C) ) to dry naturally to obtain graphene oxide-carbon nanotube composite film material (GO-CNT);

[0043] Step 2, Joule heating process: place the graphene oxide-carbon nanotube film material (GO-C...

Embodiment 3

[0045] The preparation of graphene-carbon nanotube composite film material is carried out according to the following steps:

[0046] Step 1, preparation of GO-CNT: add 100mg single-walled carbon nanotubes into 200mL ethanol, after 30s ultrasonic treatment, get 0.5mg / mL carbon nanotube (CNT) ink, add 100mg graphene oxide (GO) Ink (3mg / mL) and carbon nanotube (CNT) ink are mixed and sonicated according to the CNT concentration of 15wt%, to obtain a graphene-carbon nanotube (GO-CNT) mixed solution, and the obtained graphene-carbon nanotube The mixed solution of tube (GO-CNT) was evenly dropped onto the Teflon plate cleaned by ethanol, so that the mixed solution was evenly spread on the entire Teflon plate, and then the above-mentioned Teflon plate was placed at room temperature (20-25°C) ) to dry naturally to obtain graphene oxide-carbon nanotube composite film material (GO-CNT);

[0047] Step 2, Joule heating process: place the graphene oxide-carbon nanotube film material (GO-C...

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Abstract

The invention provides a graphene-carbon nanotube composite film material and a preparation method and application thereof. The method comprises the following steps: mixing graphene oxide ink with prepared carbon nano tube ink, performing ultrasonic treatment to obtain a graphene-carbon nano tube mixed solution, uniformly dripping the mixed solution onto a Teflon plate, and performing natural drying at room temperature (20-25 DEG C) to obtain the graphene oxide-carbon nano tube composite film material; adding the graphene oxide-carbon nano tube composite film material into a reaction kettle, stirring to obtain the graphene oxide-carbon nano tube composite film material, placing the graphene oxide-carbon nano tube composite film material on two graphite rollers which are oppositely arranged, connecting the graphene oxide-carbon nano tube composite film material with the two graphite rollers, and moving the graphene oxide-carbon nano tube composite film material at a speed of 0.1-0.3 m / min to obtain the graphene-carbon nano tube composite film material. After Joule heating, the conductivity of the graphene-carbon nanotube composite film material is sharply increased to 2750 S cm<-1>, and in a flexible aqueous aluminum ion battery, the graphene-carbon nanotube composite film material as a current collector has good cycle stability and higher rate capability.

Description

technical field [0001] The invention relates to the technical field of high-conductivity film materials, and more specifically relates to a graphene-carbon nanotube composite film material and its preparation method and application. Background technique [0002] With the steady development and popularization of wearable and portable devices, flexible batteries have attracted extensive attention. So far, many electrochemical energy storage devices promise to promote portable and flexible devices, such as lithium-ion batteries, aluminum-based batteries, metal-air batteries, supercapacitors, and so on. Although lithium-ion battery technology is quite mature, its high cost and low safety limit its further prosperity in the field of wearable electronics. Therefore, developing a risk-free battery system composed of aqueous electrolytes and abundant elemental materials to replace lithium batteries is an urgent problem. [0003] Due to the abundant reserves and three-electron redo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M10/36
CPCH01M4/663H01M4/667H01M10/36Y02E60/10
Inventor 陈亚楠刘丝靓邓意达胡文彬
Owner TIANJIN UNIV
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