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PET graphene reticulated protective film, Aochuan Shun New Materials talks about the application scenarios of graphene materials

by:Skypro     2021-04-20
Graphene is a honeycomb flat film formed by sp2 hybridization of carbon atoms, with a thickness of less than 1 nanometer and a very large specific surface area. Graphene has good tensile strength, light transmittance, electrical conductivity and thermal conductivity, and is known as the 'king of materials' in the new century.

Due to its excellent electrical conductivity, thermal conductivity, high specific surface area, high strength and other characteristics, graphene is currently mainly concentrated in six application areas:

Currently, graphene technology at home and abroad Application research is in full swing, including the following popular applications:

1. Graphene super battery

Graphene can be directly used as a positive electrode and negative electrode material in battery production, and can also be used as an additive to the positive electrode. And conductive additives in negative electrode materials can also be used as coatings to improve battery power characteristics. The problem of charging and cruising range has been plagued by new energy vehicles, because the development of lead-acid batteries and traditional lithium batteries has encountered a 'bottleneckAt the previous Shanghai Auto Show, some automobile companies introduced graphene lithium titanate batteries, which can be quickly charged within 10-15 minutes, can be continuously charged and discharged for more than 40,000 times, and have a comprehensive cruising range of more than 1,000 kilometers.

2. Graphene supercapacitors

Graphene-based supercapacitors show excellent power characteristics and cycle life. When the power density is 1kw/kg, the energy density is as high as 80Wh/kg. When the power density is 20kw/kg, the energy density can still be maintained at 33 Wh/kg. The sheet-shaped graphene electrode material has low interface resistance in the electrolyte, and after 2000 charge and discharge cycles, its specific capacitance can be maintained above 95%. Graphene-based supercapacitors have broad application prospects in high power/high energy density energy storage devices.

3. Graphene integrated circuits

Due to its ultra-high electronic transmission capacity and good thermal conductivity, graphene is considered to replace the widely used silicon and become the basis of the next generation of integrated circuits. In 2010, a research team in the United States developed the first graphene transistor and integrated it into a complete integrated circuit. In 2016, Chinese scientists developed the first low-noise amplifier monolithic integrated circuit.

4. Graphene functional coating

Graphene itself has high specific surface area, high thermal conductivity, high conductivity, high strength and other characteristics, making it an important new generation of coatings, rubber, plastics and other products. Additives can improve the characteristics of traditional products in all directions. Among them, the most prominent effects are heavy-duty anti-corrosion coatings, conductive coatings, heat-dissipating coatings, anti-static coatings and other products. Graphene shows excellent performance, and mass-produced products have appeared on the market.

5. Graphene heating element

Among many applications of graphene, graphene heating element should be the fastest growing and most advanced. There are already many products for electric heating and electric heating modules. The principle of graphene heating is that when the electrodes at both ends of the graphene heating film are energized, the carbon molecules in the electric heating film generate phonons, ions, and electrons in the resistance, and the resulting carbon molecule groups rub and collide with each other (also known as Brownian motion) generates heat. By controlling the far-infrared rays with a wavelength of 6-15 microns, the heat energy is uniformly radiated in a planar manner, and the total conversion rate of effective electrothermal energy reaches more than 99%, and the superconductivity of special graphene materials is added to ensure stable heating performance.

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