After the first application of graphene film in Huawei Mate20X, Huawei's first domestic 5G tablet MatePadPro5G recently released with ultra-thick 3D graphene cooling technology.
This technology uses graphene as a raw material and uses highly oriented thermal conductive films stacked by multiple layers of graphene. It has the characteristics of good mechanical properties, high thermal conductivity, light weight, thin materials and good flexibility.
It is worth mentioning that Huawei has just invested in CZFX graphene technology company recently to further deploy graphene technology. CZFX's existing products include graphene thermal film, graphene thermal sheet, graphene foam film, etc., used by Huawei and Honor mobile phones The "Graphene Liquid Cooling" solution is the material provided by CZFX.
The improvement of the heat dissipation performance of mobile phones provides opportunities for the development of thermal conductive materials. Mobile phone cooling solutions are diversified, mainly including graphite sheets, graphite films, metal backplanes, thermally conductive gels, liquid cooling technology (soaking plates), etc. In the future, various ways of combining or developing more feasible directions are considered.
With the wave of 5G mobile phone replacement and the peak of base station construction, graphene is expected to rapidly expand its application in cooling solutions for electronic devices. In terms of industrialization, graphene occupies a key position in strategic frontier materials. Graphene is currently on the eve of large-scale, the industry expects that the industrial application of graphene is expected to accelerate significantly.
China plans to achieve the development goal of the graphene industry to form a tens of billions of industrial scales by 2020 and an overall industry scale of 100 billions by 2025.
Graphene is a two-dimensional crystal that is exfoliated from the graphite material and consists of carbon atoms with only one layer of atomic thickness.
Because of its special structure, graphene has outstanding mechanical properties, electromagnetic properties, thermal properties, light transmittance and permeability, making it a research hotspot in materials science and has application prospects in many fields. Graphene is currently the thinnest material in the world (0.34nm) and the strongest material ever proven, with a strength of up to 130GPa, which has excellent elasticity and can be stretched to 120 of its own size %. Graphene has extremely strong thermal conductivity. The thermal conductivity of single-layer graphene can reach 5000 W/m·K, which is 3 times that of pure diamond at room temperature and 12 times that of metallic copper.
Graphene also has excellent light transmission properties, with a photon transmittance of 97.4% and a theoretical specific surface area of up to 2630 m2·g-1. According to the graphene industry alliance, in terms of patent technology sources, the earliest priority patents of graphene in China accounted for 66.6%, followed by South Korea, the United States and Japan, accounting for 12.3%, 9.7% and 3.1%, respectively. The graphene patents in China have been significantly ahead of other countries/regions.
The upstream of graphene includes graphite and other resources, equipment and systems. The downstream applications include thermal conductivity, electrical conductivity, flexible display screens and ink coatings. There are two product forms of graphene powder and graphene film in the middle stream.
With the gradual rise of graphene in lithium batteries, touch screens and other fields, the demand for graphene in the upstream of the industry chain is increasing. The industry's most concerned issue has become how to achieve large-scale preparation of graphene raw materials, which is also a current constraint The bottleneck of graphene industry development. The speed and coverage of domestic policies are increasing, attracting a large amount of industrial capital to continue to invest in graphene-related research and commercial applications. At present, the country has established a number of graphene industrial parks and graphene alliances across the country.
Changzhou, Ningbo, Qingdao, Chongqing, Wuxi and other places took the lead in setting up graphene industrial parks, and Jiangsu, Inner Mongolia, Shandong and other places also established graphene alliances, which is conducive to further integrating upstream and downstream resources, improve the graphene innovation system, and promote the graphene industry Development is also conducive to national macro-control. At the same time, various domestic excellent graphene companies are constantly emerging. Although high-end products are difficult to achieve large-scale breakthroughs in a short time due to cost and technical problems, some low-end products have been commercialized in some companies.
Chinese manufacturers QDHX graphene technology, TN graphene technology main products include graphene, carbon nanotube conductive agent; CZDL main products are graphene powder and graphene film, SSNM nanotechnology and DFNM nanotechnology main products are carbon nanotube conductive agent . QDHX's main customers are BYD, Guoxuan Hi-tech, Dongguan Xintaitong, Jiangxi Xi'an Chi, Wuhu Tianyi, etc.; TN graphene technology customers include CATL and BYD; CZDL customers include Daopeng Technology, Eenwang New Materials, China Qi Electronics, etc.; the main customers of DFNM Nano include CATL, Hubei Jinquan, BYD, Aerospace Power, Ganfeng Lithium and other enterprises.
Since the development plan of the “12th Five-Year Plan” for the new materials industry in 2012, the country has gradually begun to adopt various favorable policies to promote the industrialization of graphene, and the new “13th Five-Year Plan” for new materials has also adopted graphene as Leading industry. With the gradual clearing of the direction of graphene industrialization, graphene has become one of my country's key development industries in the future.