Huawei has invested heavily in graphene in recent years, making this new type of nanomaterial a hot scientific and technological issue that Chinese people are following and paying attention to. Huawei President Ren Zhengfei once confidently stated that graphene will trigger a technological revolution in the next 10 to 20 years and become a “black technology” that will “completely transform the 21st century.” So, what kind of new material is graphene? Can it really change the future?
Huawei announced this month that it has achieved a major breakthrough in the field of lithium batteries. Burundins Sugardaddy released the industry’s first low-temperature and long-life graphene-based lithium ion battery.
Huawei has invested heavily in graphene in recent years, making this new type of nanomaterial a hot scientific and technological issue that Chinese people are following and paying attention to. Huawei President Ren Zhengfei once confidently stated that graphene will trigger a technological revolution in the next 10-Burundi Escort20 years and become a “complete transformation of the 21st century”. “Black technology”.
So, what kind of new material is graphene? Can it really change the future?
Graphene is a quasi-two-dimensional material with only one atomic layer thickness. A long time ago, physicists predicted that the thermodynamic properties of quasi-two-dimensional crystals themselves are unstable, so they cannot exist alone. It was not until 2004 that physicists at the University of Manchester in the UK isolated graphene from graphite and proved that it can exist alone. For this reason, the two won the 2010 Nobel Prize in Physics.
Graphene is known as the “King of New Materials”. It is a two-dimensional honeycomb pure carbon material that combines many characteristics. It is the thinnest and lightest material currently available and is also the strongest and most durable. Although graphite is very soft, a single layer of graphene material is even harder than diamond. Diamond, as we know it, has very good thermal conductivity, with a thermal conductivity of around 2000W/mK (thermal conductivity), while graphene has a thermal conductivity of 5300W/mK. Graphene is also flexible and transparent, and only protons can penetrate it. These excellent characteristics give Burundins Escort graphene materials extremely broad application prospects, and they are also the most fundamental reason for attracting attention from all over the world.
Although graphene continues to “brush the screen” in the news, commercial products that can truly display its characteristics have yet to be seen.
The “graphene-powered low-temperature lithium-ion battery” announced by huawei, according to the chief executive of huawei Watt LaboratoryScientist Li Yangxing explained that in low-temperature batteries, graphene plays the role of efficient heat dissipation, not the positive or negative electrode material of the battery. Although this is not a graphene battery, according to information provided by Huawei, the performance of this new battery can already beat most lithium batteries currently on the market.
The mobile phone industry may be subverted
The Honor Magic mobile phone released by Huawei in Shenzhen earlier this month uses “graphene-assisted low-temperature lithium-ion battery” technology, and the official claims that it can be 90% charged in 30 minutes. of battery.
For mobile phones, graphene is of great significance. If mobile phone chips are made of graphene, the performance will be greatly improved while the power consumption will be greatly reduced; if graphene is used The north and south poles used for mobile phone batteries will have a battery life of more than ten times that of ordinary batteries; if graphene is used to make capacitor devices, smartphone charging can be completed in a few minutes; graphene has the characteristics of light transmission and flexibility. If it can be used On mobile phones, you can have flexible screen mobile phones and fully transparent mobile phones.
Not only Huawei, Samsung, Apple, and Nokia are competing fiercely in the field of graphene. One of the most eye-catching applications patented by Nokia is the use of graphene to make high-performance ultra-thin camera sensors.
There is a big gap between fantasy and reality
In fact, for graphene materials, there is a big gap between fantasy and reality. The fantasy graphene has a perfect honeycomb structure, but the actual Burundins Escort graphene is like a rag, made of several graphite Made of spliced vinyl microsheets. There are a lot of flaws on graphene, and a lot of dirty stuff. Therefore, the performance of the actually prepared graphene material is not that good, and the value is not that high.
The heavy investment of enterprises has not enabled the real industrialization of graphene. Among international enterprises, only two companies have completed the production of graphene used in the LED industry Burundins Sugardaddy, other research institutions and companies can only produce children in small batches, and their products are mainly used in research by research institutions.
The international graphene industry is in an early stage of development. The low level of technology and the difficulty for companies to make profits are the two major reasons that hinder the industrial development of graphene.
From a technological perspective, one of the difficulties is how to prepare large-area, stable, high-tool-quality graphene in batches. At present, the entire industry is still in the product research and development stage, and only a few companies can produce it on a large scale. To prepare high-quality graphene, the defective rate at the industry level affects the promotion of downstream applications.
In terms of profits, the acquisition cost of graphene is still high.The application market has not yet been fully opened, which makes it difficult for graphene companies to steadily obtain profits, and the natural scale is not obvious. In the future, these companies will need to integrate the upstream and downstream industry chains to reduce costs and increase sales. Burundi Sugar
Many countries have invested in research
At the beginning of this year, three ministries and commissions including the Ministry of Industry and Information Technology, the National Development and Reform Commission and the Ministry of Science and Technology announced “Several Opinions on Accelerating the Innovative Development of the Graphene Industry” was published, aiming to form a perfect graphene industry system in 2020, realize the standardization, serialization and low-cost of graphene materials, and realize large-scale application in multiple fields.
Although my country has the dual advantages of abundant reserves and policy support in graphene research, as the cradle of graphene’s birth, the UK has a stronger foundation for research in this field. In the past year, more than 40 companies have jointly carried out research on graphene and related two-dimensional materials with 235 researchers from the University of Manchester, and thousands of independent companies have been spawned in the surrounding area.
The United States, Japan, and South Korea are also leading the way in innovative research on graphene. The U.S. policy support for graphene projects is mainly concentrated in the research and development fields of graphene transistors, graphene supercapacitors, nano-graphene composite material electrodes for lithium-ion batteries, and high-sensitivity detectors. Foreign technology giants are accelerating the industrialization and application of graphene. IBM, Samsung and others have intensively begun research on the application of graphene.
IBM is one of the most active companies in developing high-speed transistors using graphene in the channel layer. It produced the first graphene transistor in 2008 and developed an integrated circuit made of graphene wafers in 2011. circuit, a big step towards developing graphene computer chips.
In terms of competition in productization, South Korea’s Samsung BI Escorts company is also in a leading position. Samsung holds 9 core patents related to the working methods and structure of graphene transistors, and many scientific research projects are already on the road to productization.
Nokia began researching graphene in 2006, participated in the European Graphene Flagship Project in May 2011, and received US$1.35 billion in funding for the project in February 2013. Nokia is developing graphene light sensors. Graphene is very sensitive to light, so using graphene as a camera will have a photosensitivity 1,000 times higher than that of ordinary cameras.
Technology patent litigation may break out
Recently, Liu Zhaoping, director of the Patent Committee of the China Graphene Industry Technology Innovation Strategy Alliance, made a 2016 patent work report.
Liu Zhaoping said: “According to Derwent’s patent database, in 2015In April 2019, there were 14,000 graphene-related patents disclosed globally; as of December 6, the number had increased to 27,000. , doubled. China’s patents were 8,000 in April 2015, and now the specific number is 16,844, accounting for 60% of the world’s patents. ”
China has a large number of patents in the field of graphene, and the problem cannot be ignored. Liu Zhaoping said: “China’s graphene patent numbersBurundi Sugar Daddy surpasses Japan (Japan), South Korea and even the United States. However, if you carefully analyze the quality of patented tools, you will find that the real core of the patents applied for by China is not much, and too little is about the source. There are too few Chinese patents that are really useful. Once there is a patent dispute, it will be very detrimental to China, and there should be measures to deal with it now. ”
At present, there are nearly 20 graphene industrial parks in the country, and this number is still increasing. Graphene industrial parks are being built in both developed areas and remote areas. Faced with this wave of “graphene gold rush”, Liu Zhongfan, a professor at the School of Chemistry and Molecular Engineering at Peking University and an academician of the Chinese Academy of Sciences, pointed out that based on past history, rationality should not be lost in the process of new material R&D and industrialization. The graphene industry is truly strong and requires time to accumulate. It requires continuous investment and even more patience.
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