In the past two years, curved screens or flexible screens have entered our lives. Especially curved screens have been used by Samsung and LG on smartphones and TV screens. Although it is a curved screen, there is still a big gap with the flexible screen technology expected by the industry. In the words of the industry, this is called bending for bending.
In the field of flat panel display, more and more attention is paid to graphene materials, and China is no exception.
China leads the research and manufacture of carbon nanotubes and graphene
According to Lux Research in Boston, China is already a global leader in the research and manufacturing of carbon nanotubes and graphene. Due to oversupply in the global market, prices have fallen, profits have fallen, and this emerging industry may have fluctuated.
Lux predicts that the global graphene platlet and carbon nanotube market demand will be 1520 tons and 2016 tons in 2018, respectively. However, China's supply alone is sufficient to supply global graphene nanoplatlet demand until 2016. Similarly, the total current capacity of carbon nanotube suppliers in China can meet global demand until 2015. We believe that as the capacity of graphene and carbon nanotube nanoplatlets increases, and the capacity utilization rate increases, prices will continue to fall, and at the same time will squeeze the profitability of nanomaterials.
China ’s crazy development of carbon nanotube materials is supported by the twelfth five-year government plan. From 2011 to 2015, despite the lack of accurate figures for government support funds, Ma believes that the government will support 20 100 million US dollars will be 2.5 times the previous five-year plan.
China is now a global leader in graphene publications and patents. Its carbon nanotube manufacturing may account for 50% of the world. According to Lux's observation, although China's process and manufacturing technology in graphene is still lagging behind, China is rapidly catching up.
China's carbon nanotube publications are in a leading position in the world, and its number of patents ranks second in the world. According to Lux's prediction, China will soon catch up in carbon nanotube material manufacturing, mainly due to rapid growth rates.
From 2013 to 2015, Ma told EETimes that only the announced expansion plans of Cnano and Timesnano increased by 500 tons and 100 tons, respectively, leading to China increasing its global production capacity market share from 30% to 50%. Due to CNano and timesnano The two have cost advantages, a comprehensive customer network, and continuous financial support. In the future, they should be regarded as potential business partners in China.
China has a bright spot in the manufacture of graphene, SixthElement and Morsh in Ningbo, which have already surpassed the United States in the production of graphene nanopetlets.
In terms of graphene, China is in a backward position, but it is trying to catch up with the United States. Overall, Chinese graphene companies are in a weak position in terms of innovation capabilities compared to the world, partly because they are relatively young, Ma said. So far, their production costs have not been able to compete with the world's leading graphene suppliers.
According to Lux data, so far in 2014, China's domestic graphene and carbon nanotube market will reach 22.4 million US dollars and 48.4 million US dollars, mainly driven by lithium-ion batteries and new applications, such as coatings and heat dissipation materials Wait.
Application and R & D of graphene materials in China's touch screen industry
China has unique conditions for developing the graphene industry. It is reported that China's graphite ore reserves account for 75% of the world's total reserves, and production accounts for 72% of the world's total output. It is one of the few minerals in China that has international competitive advantages. As of 2012, China's literature contribution in the field of graphene has reached 5072, accounting for 29.2% of the global graphene literature, surpassing the United States' 27.3% and ranking first in the world.
It is reported that since the discovery of graphene in 2004, how to solve the two key problems of large-area, high-quality graphene preparation and rapid and efficient transfer, so that graphene is used in transparent electrodes, has been plagued many researchers. If this kind of material is used for the resistive touch screen, it is necessary to catalyze the growth of graphene on the metal surface before transferring it to a suitable substrate before it can be used.
The production of graphene requires a cutting-edge preparation process. At present, there are four main preparation methods in the industry, namely mechanical peeling method, epitaxial growth method, graphite oxide reduction method, and vapor deposition method (CVD). The first three raw materials are graphite, and the raw materials of CVD method are mostly methane. Due to the relatively low manufacturing cost, the current industry mostly uses mechanical peeling method and graphite oxide reduction method to make graphene.
At present, in both directions of graphene film and graphene microchips, China is actively exploring.
Regarding the research and development of graphene touch screens, the research and development team of Changzhou Two-Dimensional Carbon Technology Co., Ltd. has broken the touch technology of graphene film applied to small and medium-sized mobile phones, and realized the docking of graphene film materials and existing ITO module process lines. We are actively working with upstream and downstream companies, industry associations, and local standards institutes to draft relevant industry standards.
Industry experts said that the graphene film process line only needs to be a simple transformation of the existing ITO module process line to complete the docking, the industrial application of graphene film materials in the field of touch display will accelerate.
Jin Hu, President of 2D Carbon Technology, said that graphene has many advantages over ITO glass for touch screens. For example, ITO uses indium, which is a rare earth material. The global stock is very small, and it is toxic and not easy to recycle. It is simple and easy to recycle. What's more outstanding is that it is very flexible and easy to bend. Dr. Qingkai Yu of Two-Dimensional Carbon Technology first published the growth method of synthesizing graphene on nickel and copper substrates by chemical vapor deposition (CVD) in April 2008, and successfully grown the world ’s first The large size and high quality graphene film makes it possible to produce graphene film on a large scale. In 2010, Dr. Yu proposed and realized the use of growing single-crystal graphene arrays to solve the difficult problem of large-scale graphene single crystal synthesis. This achievement will advance the research and application of graphene high-speed electronic devices.
At present, domestic academia and industry are intensifying the industrialization of graphene. With the establishment of the graphene industry technology innovation strategic alliance, this speed is expected to increase.
Jinlu Group and the Institute of Metal Research of the Chinese Academy of Sciences jointly developed battery-grade graphene technology. On November 11, 2012, the large-scale preparation technology of the graphene material that was jointly completed passed the achievement appraisal. As of December 31, 2012, the company invested a total of more than 6 million yuan and received financial subsidies of more than 13 million yuan. In addition, the company is developing graphene transparent conductive films, graphene-based three-position network heat dissipation materials, and graphene-based power battery projects. In terms of graphene transparent conductive film, the Metal Research Institute can prepare a 4-inch graphene transparent conductive film.
Shenzhen Bateray, a subsidiary of China Baoan, is characterized by a complete industrial chain and strong customers. Bettray is currently the only company in the world that has a complete graphene value industrial chain. The company completed the construction of the graphene pilot line in November 2011 and put it into production. It is understood that Bettray submitted four patent applications related to graphene to the country, and the method of preparing spherical graphene has received an invention patent certificate on April 28 this year. According to public information, Bettray currently accounts for about 30% of the global market for lithium battery anode materials. Samsung, LG, Panasonic and BYD are all Bettray customers.
Changzhou 2D Carbon Technology Co., Ltd. announced in May this year that its first production line with an annual output of 30,000 square meters of graphene transparent conductive film has achieved mass production. The commissioning of this graphene transparent conductive film production line and the successful construction of the pilot line for the graphene capacitive touch screen used for the supply of the graphene mark a key step in the industrialization of the preparation and application of graphene materials.
Letong shares signed a "Graphene Ink Project Cooperation Agreement" with Ningbo Moxi earlier this year, and agreed to set up a joint venture company to develop and produce graphene ink. The total investment is planned to be 100 million yuan, and the registered capital of the joint venture company is 30 million yuan. In RMB, the company invested RMB 24 million (80% equity) in cash; Party B contributed 6 million yuan (20% equity) at the price of graphene ink related technology. Ningbo Moxi promised to provide graphene raw materials to the joint venture company at the most favorable price. Both parties will use their own marketing network to help the joint venture company promote graphene ink products.
The Huali family disclosed in July 2012 that the controlling shareholder Nanjiang Group and Xizhe Investment, the Ningbo Institute of Materials of the Chinese Academy of Sciences, and Liu Zhaoping ’s research and development team formed Ningbo Moxi Technology Co., Ltd. in April 2012. The company invested in the world ’s first mass production of graphite. The ene production line is expected to be completed and put into production in 2013. Graphene is a high-tech new material, and the maturity and industrialization of graphene products require a lot of subsequent research and development and investment. The Nanjiang Group has no plans to transfer or designate graphene projects to listed companies.
Fangda Carbon will build the world's largest special graphite production base, and the comprehensive production capacity of needle coke and ultra-high-power graphite electrodes will also rank first among global carbon companies. In May 2013, the company received a notice of invention patent granted by the State Intellectual Property Office for the method of preparing graphene using limestone as a raw material.
Graphene is the thinnest in the world, with the highest thermal conductivity, the best electrical conductivity, soft and transparent, the strongest chemical stability, and the toughest materials. It will bring the mobile phone industry to mobile phone displays, batteries, sensors, components, etc. Revolutionary application. With the continuing fermentation of the smartphone trend, it is believed that graphene will be more widely used in the field of flat panel displays in the future.
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