Six major problems in bulk manufacturing in the graphene industry

Graphene seems to be most reliable in the new type of battery, or more precisely in the application of the new Super capacitor research. However, it seems that people either intentionally or unintentionally have avoided a problem, graphene mass manufacturing.

This is very close to the condition of nanomaterials. Many of the special properties of graphene are based on its monolayer structure. But bulk to get an atom-thick graphite monolayer in the next few years I see no hope.

It is likely to end up with the result that, like nanomaterials in the past, our manufacturing of graphene will gradually become a relatively thin graphite sheet structure. As for whether it is a single layer or dozens of layers or more, God knows! (This is the case with the bulk manufacturing of nanomaterials. We quickly reduced the manufacturing technology of nanomaterials to how to achieve a size of 100 nanometers. As for the most basic requirements of nanomaterials, that is, the arrangement of their microscopic structures, who cares? ) Admittedly, we do have a lot of skill in popularizing emerging technologies.

The domestic understanding and development of new technologies is amazing. But sometimes problems can be worrying.

A large number of companies have emerged in Jiangsu under the name graphene. I don't even know what they're selling in graphene without a shadow. However, people have the ability to sell tens of millions or more graphene every year. It is said that it is mainly used for the cooling of LEDs. Their so-called graphene, as you can imagine with their toes, is actually graphite(this thing could have been thermal and conductive even if it had a flaky structure). Is to use a gimmick to increase sales, get state funding support. Whether this approach is good or bad for the future development of graphene is currently unknown. The advantage is that companies use this method to mix graphene with a face in marketing. Real technology breakthroughs will only surprise you. That is, earning enough to call, create enough momentum, reduce the difficulty of future market acceptance. The bad thing is that a group of assholes will spoil a pool of spring water and ruin their reputation. In the future, even with good graphene technology, capital markets and product markets will not be as attractive. That would be a disaster for those struggling to develop graphene.

Producing single-layer graphene in bulk hasn't been a problem since 2009.

Analysis of Six Problems and Situation of Graphene Batch Manufacturing

It is chemical vapor deposition on the base of copper foil. There are now dozens of domestic manufacturers selling chemical vapor deposition as single-layer graphene stoves. And buying graphene for a proper downstream application is bound to be a Raman spectral representation, which is the most basic quality control, and no one is as stupid as you say. The Raman spectrum makes it easy to tell whether graphene is monolayer or multilayer, and the Raman spectrometer has long been given cabbage by domestic manufacturers

How can you mislead an uninformed reader with outdated and erroneous information?

Producing single-layer graphene in bulk is still a problem.

Although CVD and various variants of CVD have made great progress in the preparation of monolayer graphene, monolayer graphene monocrystals have recently been manufactured in centimeters. However, from the perspective of industrial manufacturing or commercial manufacturing, there are still great difficulties in mass manufacturing of graphene.

Difficulties 1:

The scale of preparation of high-quality single-layer graphene is limited by the cavity size of CVD equipment. The existing CVD method can not achieve continuous preparation of monolayer graphene. Although the Japanese have demonstrated the so-called 100-meter-long graphene, the surface of the material has many holes and is completely unusable. The continuous preparation technology of CVD graphene and the problem of product yield have not yet been solved.

Difficulties 2:

High-quality graphene transfer methods, commonly used wet etching transfer, often bring problems such as folds, impurities, and damage, and it is difficult to achieve mass transfer; Many years ago, the Korean roll roll technology, according to the practice of some domestic manufacturers, there are many subtle but difficult to solve problems, but also can not be used.

Difficulties 3:

The combination of difficulty 1 and difficulty 2, that is, the continuous preparation and transfer of CVD graphene, the matching and docking of the two, forms an automated production technology, which has no way out without solving the first two difficulties.

Difficulties 4:

Even if these three difficulties are solved, graphene does not have much advantage over some existing technologies, such as ITO, such as carbon nanotubes, such as nano silver wires. And ... Graphene faces a strong competitor, and it is unclear whether it can win.

Difficulties 5:

Even if graphene difficulty 4 is solved, there is a commercial difficulty: In order to kill ITO, graphene must not be sold at a high price, so the added value of the product is too low and the profit margin is too low.

Difficulties 6:

Some people use graphene's name to fish and sell dog meat. This has damaged the industry's reputation and destroyed the industry's long-term prospects. It is worrying. Graphene-related news and exhibitions have become too much hype, and many have become stories needed for capital operations and stock market operations.

Some netizens understand certain technical achievements. They often regard propaganda, theory, and ideal conditions as actual things. But the fact that we are really engaged in materials science research is really not a human suffering.

Situation analysis:

A montmorillonite intercalated compound has not been truly accepted by the market until now.

How easy is it to think that something as high in surface energy as graphene is to be stable and used?

If people in the industry are not focused on subsequent development, but are keen to hype the concept and break through the development of technological resources, then the consequences are absolutely catastrophic.

How to evaluate a new technology, especially the technology of material science, is not an easy thing in itself. It requires a lot of supporting conditions. In fact, many material science and technology achievements require half of the effort to be spent on pure application testing later. This studio needs a lot of input. Without sufficient capital support and downstream application support, it is basically impossible.

The breakthrough in materials science depends on many matching conditions. In other words, in fact, the promotion of his achievements is a certain degree of difficulty and vulnerability.

Destructive development is followed by a lack of interest in capital. This one's a pain in the ass. At that time, even if there are good things out, lack of matching and matching conditions, it is also easy to die.

Just like now, if one person invented a technology, it can greatly reduce the surface reuniting and growth of nanoparticles. At this point, if he wants to raise funds or apply for funds, he faces a very embarrassing situation and may not be applauded.

You still underestimate the determination and courage of the capital to seek profits. For 100 % profit, they can risk the gallows. As long as things are really good, can you make a profit and worry about no one investing? The capitalists will kill you with money every minute.

The page contains the contents of the machine translation.