The most fiery graphene can't achieve great things

2022-09-19
  • Detail

Graphene can't achieve great things by "flickering" and will have to rely on "killer" applications in the future

Abstract: on March 20, the founding meeting of the "100 people's meeting of emerging industries" and the Beidou industry, which also has a certain self-healing ability development forum, was successfully held in Beijing. Academician Liu stressed that the future graphene industry will be based on the "killer" Application of graphene materials, rather than as a "panacea" additive

on March 20, the inaugural meeting of "100 people in emerging industries" and the Beidou Industrial Development Forum were successfully held in Beijing. Liu Zhongfan, academician of the Chinese Academy of Sciences and professor of Peking University, made a thematic report entitled "opportunities and challenges of graphene industry", which comprehensively introduced the current situation, application achievements, market opportunities, challenges and future development of graphene industry. Academician Liu stressed that the future graphene industry will be based on the "killer" Application of graphene materials, rather than as a "panacea" additive

on March 20, the inaugural meeting of "100 people in emerging industries" and the Beidou Industrial Development Forum were successfully held in Beijing. The "emerging industries 100 people's Association" is an unofficial, non-profit and public welfare industry research and exchange platform jointly launched by a group of well-known experts, scholars and entrepreneurs who are interested in promoting the development of China's emerging industries. It is committed to forward-looking research and judgment of the development trend of global emerging industries, in-depth analysis of new opportunities and challenges faced by domestic emerging industries, and focusing on major issues in the development of China's emerging industries, Gather ideas and contribute wisdom to accelerate the implementation of the strategy of strengthening manufacturing and networking. Liu Zhongfan, an academician of the Chinese Academy of Sciences, made a report on the theme of graphene at the founding meeting

what I am talking about today is the graphene industry. Strictly speaking, it is not an industry, but a burgeoning emerging industry. Graphene is a pure carbon material with only one carbon atom layer. Because of its thinnest, lightest, strongest and hardest characteristics, it is known as the king of new materials. At the same time, its flexibility, transparency, stability and tensile properties are particularly good. It is conceivable that with so many advantages, it is understandable to call it the king of new materials. Therefore, it is generally considered as a strategic emerging industry, which will dominate future competition. In addition, it will have very broad application prospects in many fields, such as electronic information, aerospace, national defense, energy conservation and environmental protection, and biomedicine

however, the graphene industry in the future is still a long way away, and I think it is a road full of thorns. The threshold of graphene research and development is actually very high. My team has been doing graphene research for many years and found that it is more difficult to do it, so it is by no means what a large number of steel sports can do. So, what stage is graphene industry in? Many people have the misconception that this industry has entered the early stage of large-scale application, but in fact it belongs to the peak stage of expectation. In particular, graphene industry is a real industry, not an interconnected or virtual industry. It needs to be done in a down-to-earth manner. Only by promoting technology can it take a share in the big cake of the future industry

thin film graphene

powder graphene

graphene is a polycrystalline film or powder piled up by single crystal fragments. In general, the technological preparation process of graphene is not ideal. Although both powder graphene and thin-film graphene are graphene, the manufacturing methods and uses are completely different. In addition, the difference between graphene and graphite is that if you peel off the graphite layer by layer, graphene can be peeled off layer by layer after various treatments. The two layers are very thin, and the number of layers of products made now is difficult to control. Relatively speaking, such methods are of poor quality. They are not pure carbon, but also contain oxygen, hydrogen and other things. In addition, a kilogram of graphene requires 50 kilograms of concentrated sulfuric acid, which may cause a lot of pollution during mass preparation. At this time, we also need to improve our awareness of environmental protection

at present, the prepared graphene material is far from ideal, and there is still much room for improvement. Therefore, I often say recently that today's graphene material is not the same as the future graphene material, and the uses you can expect are also different. What carbon fibers could do in those days and what carbon fibers can do now were unexpected in those days, so in this sense, we must understand, The current use of graphene may not or may not even become the core of the future industry. For us, we need to make it to the extreme in order to form an industry. Preparation determines the future. The key is whether we can make really good graphene materials

research direction and trend of graphene

the following examples also represent the research and development direction of graphene industrial ecology. The first is to label graphene, which is what we are doing. Like T300, the cornerstone of graphene industry will go this way after all. That is, now the level is still very low, we must seriously move forward to improve the level, and finally we can get closer to the ideal state, and finally we can become the future graphene industry

next is our second-generation equipment. The so-called capacity is 2000 square meters per year, and the quality is quite good. Nowadays, when discussing graphene materials or graphene industry, we often have a misunderstanding, that is, we can develop graphene with graphite ore resources, and confuse the concept of graphite ore and graphene. Although graphite ore can be developed into graphene, this path may not be cost-effective or reasonable. So here I think there are graphite ore resources, we should also be careful not to simply confuse graphite ore with graphene

is there any other possible or even better way to develop graphene? For example, our team is also studying powdered graphene. Through diatomite, a material with conductivity at least ten times higher than the existing graphene powder can be obtained, and the dispersion is particularly high. Although conductivity and dispersion ability are indeed very important indicators of powdered graphene, there are still other technical options to make powdered graphene

as for the future graphene industry, I believe it will be based on the killer application of graphene materials, rather than as a panacea additive. For example, some products on the market now, including clothing, coatings, composites, adsorption and lubrication products, graphene lithium batteries, smart bracelets, graphene touch screens, etc., should be said to represent the main products of graphene research and development in our country, and should be said to be in the first team in the world

but compared with foreign countries, our focus is a little different. I'll show you the graphene exhibits at the latest world mobile communication conference. There is a graphene experience area, which can well represent the direction of international attention. International attention is focused on graphene supercars, as well as IOT sensors, wearable devices and health management, data communications, energy technology, composites and so on

you will notice that the international attention is at least a little different from our propaganda. They are concerned about the future. What I want to say is that the future graphene industry will definitely be a big cake, but how much we can cut depends on what we care about now and what we care about. I think we really should not only focus on today's products, but also on the core technologies that will lead the future, which is very important

next, let me give you a few things my team is concerned about. One is super graphene glass, which is our unique technology. Graphene as a layer cannot be taken out alone. For the first time, we have implemented the strain gauge extensometer [strain gauge] on glass. As you know, glass is used everywhere. Our strategy is to put glass on graphene and let it enter the market through this, Walk into thousands of households. The combination of graphene glass and glass is completely complementary. Both of them are transparent, so we can maintain the nature of glass, but one is a good conductor of electricity and the other is an insulator of electricity; One is the electric heater of water, and the other is the insulator of water. You must understand that we don't paint graphene powder on it. We make things with high temperature. This product actually has broad application prospects, such as electrochromic windows, functional trams, glass radiators, high-efficiency cell culture dishes, etc

another field is super graphene optical fiber. Why do you combine optical fiber and graphene? The main principle of optical fiber is quartz. Graphene was first successfully grown in quartz, so combining graphene with optical fiber can show very beautiful graphene in all types of optical fibers. So what can be done after the combination, such as electro-optic modulator, optical fiber detector, and the third generation semiconductor lighting. We are still trying to do the same thing with ordinary glass, which may be really cheap and good performance, so we also look forward to serving as a foundation for the next generation of semiconductor lighting technology

understanding and suggestions on graphene industry

then let me briefly sort out my personal views on the current situation of China's graphene material industry by using the direction key to move the focus to the position that needs to be corrected and pressing the OK key to enter the editing state. It is undeniable that China does have the largest technical research team and R & D team, but most of these start-up small and micro enterprises are in the state of small workshops, Powerful large enterprises have little substantive participation. There is a serious tendency to be eager for quick success and instant benefit, and there is a lack of attention to the core technology of the graphene industry in the future. There are a large number of patents, but the innovation ability is insufficient, and there is a lack of real core intellectual property rights. I have more contact with R & D teams and R & D units. In fact, when it comes to a certain aspect, the core patent is laid out by others, and we can only bypass that patent. Therefore, how many of the 80% patents are core patents and how many can be used is really hard to say, and we need to pay attention to it

in addition, the hype in the capital market is mixed, which is also a reality. The blind construction of industrial parks and the serious phenomenon of simple repetition. It should be said that the testing standards are being done, but have not yet been established. The market products are mixed, and the investment is scattered and seriously insufficient

I believe that the government should clarify its decision-making positioning, focus on the layout of the core technology of the graphene industry in the future, and hand over medium and low-end products to the market and enterprises. For the current situation, the government should be able to encourage everyone, but we should grasp what we don't understand now and do the layout in the future. If the market and enterprises can do something, in fact, the government only needs to layout the environment

in addition, several high-end R & D institutions for the future graphene industry should be built, with centralized investment and stable support, reflecting the national will. As a strategic new material, it is very important and cannot be completed within a few years. At this time, for enterprises, of course, interests should be considered, but the will of the state should be reflected in the future layout, rather than mixing roles with the market

at the same time, driven by the "made in China 2025" strategy, we need to cultivate craftsmanship. I think graphene should be a very good starting point. How to make graphene bigger and stronger, we should focus on the layout of graphene materials

Copyright © 2011 JIN SHI