What is graphene? Tell me about it.

The selection of graphene needs to consider many factors such as the implementation of quality standards, such as the implementation of quality standards, national standards, industry standards, etc. The ** of graphene is about one or two hundred yuan per square meter, the cheap ones are dozens of yuan, and the expensive ones are one or two thousand yuan. Before you choose, it is recommended that you fully understand and compare graphene, and you can consult Chengdu Atech Special Graphite****.

Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms with sp2 hybrid orbitals, hexagonal and honeycomb lattice.

Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery, and is considered to be a revolutionary material in the future. Andrei Geim and Konstantin Novoselov, physicists from the University of Manchester in the United Kingdom, were jointly awarded the 2010 Nobel Prize in Physics for successfully separating graphene from graphite using micromechanical exfoliation. The common powder production methods of graphene are mechanical exfoliation, redox and SIC epitaxial growth, and the thin film production method is chemical vapor deposition (CVD).

As the leader of the new material industry, graphene plays an increasingly significant role in driving the transformation and upgrading of traditional manufacturing industries, cultivating the growth points of emerging industries, and promoting mass entrepreneurship and innovation. Under the guidance of national policies, graphene has been deployed in various places. At present, the whole graphene industry chain in China has begun to take shape, covering the whole link from raw materials, preparation, product development to downstream applications, and has basically formed a graphene industry pattern with the Yangtze River Delta, the Pearl River Delta and the Beijing-Tianjin-Hebei-Shandong region as the collection area and distributed development in many places.

In 2016, the overall scale of China's graphene market exceeded 4 billion yuan, and six major market segments have been formed: new energy applications, health applications, composite materials applications, energy conservation and environmental protection applications, graphene raw materials, and graphene equipment.

Since graphene materials were successfully manufactured for the first time in 2004, they have been generally optimistic about the scientific and technological community, believing that graphene is a subversive new material, because of its excellent thermal and electrical conductivity, it will likely lead the revolution of black technology, and the 21st century will also become the "graphene era".

Because graphene materials have very excellent thermal and electrical conductivity, so from some of the products listed above, we can see that its characteristics are fully utilized, as far as graphene batteries are concerned, their conductivity and conversion rate will be higher than traditional lithium batteries and polymer batteries, so related products will become more extreme and excellent.

Summary. Hello, graphene is a two-dimensional carbon nanomaterial composed of carbon atoms with sp hybrid orbitals, hexagonal and honeycomb lattices.

What is graphene? \

Hello, graphene is a two-dimensional carbon nanomaterial composed of carbon atoms with sp hybrid orbitals, hexagonal and honeycomb lattices.

Hello classmates, related knowledge expansion: Graphene is a material extracted from graphite, originally separated from it, it is an extremely conductive form of elemental carbon, composed of a single flat sheet of carbon atoms arranged in a repeating hexagonal lattice. Graphene has distinctive features:

It is 200 times heavier than steel, highly transparent, flexible, has an incredible natural barrier (no graphene penetration except for hot protons) and the most conductive substance at room temperature. In addition, at one atomic thickness, it is classified as a 2D material with only two dimensions. Graphene is a million times thinner than paper.

Made of carbon, it's one of the planet's supermaterials. The flat honeycomb pattern of graphene gives it a number of unusual features, including the status of "the strongest material in the world". Graphene was isolated from the lead of a pencil and was identified by two scientists at the University of Manchester in 2004.

Geim and Novoselov. Their discovery, along with their research into the eventual material breakthrough, earned them the Nobel Prize in 2010. Since then, more than 15,000 products and applications involving graphene have been patented worldwide.

Graphene - the Nobel Prize "torn" by scientists!

Andrei Geim and Konstantin Novoselov, physicists at the University of Manchester in the United Kingdom, successfully separated graphene from graphite by micromechanical stripping, they first peeled the graphite sheet from the highly directional pyrolytic graphite, then glued it to the tape, and then tore the tape, and then the stone black sheet was split in two, and kept repeating this operation, the graphite sheet became thinner and thinner, and finally they finally got a graphite sheet composed of only one layer of carbon atoms, which is graphene. As a result, they were jointly awarded the 2010 Nobel Prize in Physics.

Since graphene won the Nobel Prize, the world has set off a graphene boom, graphene is known as "black gold", "king of new materials", and is known as the "magic material" that changes the 21st century. The shadow of graphene can be seen everywhere in life, such as graphene**, graphene electric heaters, graphene batteries, graphene thermal underwear, graphene physiotherapy supplies and so on.

Graphite - an important national strategic resource!

Natural graphite can be divided into two industrial types: crystalline graphite (flake graphite) and cryptocrystalline graphite (earthy graphite) according to its crystalline form. From the outside, natural graphite is very similar to the coal we see in our daily life!

The main uses of natural graphite are anode materials for lithium-ion batteries, refractory materials such as magnesia carbon bricks and graphite crucibles, and flexible sealing and heat dissipation materials, such as the graphite sealing materials developed by the Long March-2F Yao-12 launch vehicle, which has become a key material for liquid rocket engine sealing with high wear resistance and high reliability. The common use of ordinary people is also a pencil lead made of graphite. The rise of new energy vehicles has made the United States, European Union countries, and Australia compete for natural graphite resources to a national strategic height, and natural graphite is listed as a strategic mineral resource, including China!

The chemical composition of graphene and graphite is carbon (C), so is there a relationship between them? This discussion has been going on in the industry for years!

Some experts and scholars who do graphene research and development believe that graphene is self-contained and has a higher level than the traditional graphite industry! The reason is that graphene can be prepared from other carbon-containing raw materials, such as methane and corn stover. Shenzhen Enewang Technology is to use methane to prepare graphene, and Shandong Shengquan Group uses crop straw to prepare biomass graphene, without using natural graphite.

Another part of the people believe that graphene is prepared from natural graphite, and graphene is just a branch of the traditional graphite industry system!

The author believes that there are two sides to the research and development of scientific research and technology, and experts and scholars in the industry should strengthen the basic and applied research of graphene, explore the characteristics of graphene prepared by different methods, and make it play its due value and role!

Today's graphene technology is not mature, I hope that domestic enterprises can be down-to-earth, strengthen the formulation of national standards and industry standards, provide consumers with real products, let high technology into people's lives, and let ordinary people feel the improvement of the quality of life brought by graphene products!

What is Graphene Technology? 丨EOS 20 Questions Episode 8.

Its perfect lattice structure is often mistaken for stiffness, but this is not the case. The connections between the individual carbon atoms of graphene are very flexible, and when an external mechanical force is applied, the carbon atom surface is bent and deformed. In this way, the carbon atoms do not need to be rearranged to adapt to external forces, which also ensures the stability of the graphene structure, making the graphene harder than diamond, and at the same time can be stretched like pulling rubber.

This stable lattice structure also gives graphene excellent electrical conductivity. As the electrons in graphene move through orbitals, they are not scattered due to lattice defects or the introduction of foreign atoms. Due to the very strong interatomic forces, the electrons in graphene are disturbed very little at room temperature, even if the surrounding carbon atoms collide.

Graphene is a honeycomb planar film formed by the sp2 hybridization of carbon atoms, and is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called single-atomic layer graphite. Its thickness is about 1 nm in the vertical direction and about 10 nm in the horizontal direction and about 25 nm in the horizontal direction, and it is the basic building block of all carbon crystals (zero-dimensional fullerenes, one-dimensional carbon nanotubes, three-dimensional body-oriented graphite) except diamond.

The above is the relevant answer to this question, I hope it can help you.