The country has developed a new technology for rapid mass production. Chinese experts have successfully developed graphene super-strong batteries with promising industry prospects. The Ministry of Industry and Information Technology, the National Development and Reform Commission and the Ministry of Science and Technology issued three "Opinions on Accelerating the Innovation and Development of Graphene Industry"... The graphene concept has attracted widespread attention in the past few days. In fact, graphene not only has broad industrial application prospects, but also will bring about subversive changes in the future battlefield.
Some scholars once said: "The 19th century is the age of iron, the 20th century is the era of silicon, and the 21st century is the era of carbon." Graphene is a representative material of the carbon age. Graphene is a two-dimensional carbon film with a hexagonal honeycomb lattice (benzene ring) of only one atom thickness. It is derived from graphite, which is formed by stripping a graphite sheet into a single layer to form a single layer structure having a thickness of only one carbon atom. Although graphene has not yet been put into mass production stage, its performance advantages have made people look forward to its application prospects in the future battlefield.
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The Enlightenment of "Peeling Pencil Core"
Since the interlayer between the layers in the graphite crystal is large and the van der Waals force is combined, the layered structure is relatively relaxed, and the flexibility between the carbon atoms in the graphene is large, so the graphite layer is peeled off and finally obtained. Single-layer graphene with excellent performance has been a repeated attempt by the scientific community for centuries. However, the preparation of graphene is not an easy task. For example, an ordinary pencil lead is made up of about 3 million layers of graphene. Scientists have tried many ways to try to strip graphene, but they all ended in failure. Until 2004, Andre K. Heim of the University of Manchester in England and his colleagues got inspiration from the “pencil pencil core†and accidentally discovered a new and simple method – micro mechanical peeling: graphite The sheet is pasted on a plastic tape of about 15-16 cm length, then the tape is folded over, stuck on the other side of the sheet, the graphite sheet is sandwiched, and the tape is separated from the graphite sheet, thereby smoothly dividing the graphite sheet into Two pieces, the thickness is reduced to 1/2 of the original. Thereafter, the above procedure was repeated 10 times, and the previously obtained sheet was continuously divided, and finally a single layer of graphene was obtained. On October 5, 2010, Andre K. Heim and Konstantin Novoselov received the Nobel Prize in Physics for their outstanding research in graphene materials.
In addition to the micromechanical stripping method, other new methods for graphene stripping have emerged, such as epitaxial growth, graphite oxide reduction, and the like.
The characteristics of "magic material"
Graphene is bound to play a significant role in the military field because of its superiority over other materials.
First, the material is hard. Graphene has a thickness of 0.34 nm and a specific surface area of ​​about 2630 m 2 /g. It is the thinnest material found, but its strength is 180 gigapascals (about 100 times that of Pugang Steel). It is known to man. The most intense substance. The physicist at Columbia University used a probe made of diamond to test the graphene's ability to withstand graphene. The maximum pressure that graphene can withstand at a distance of 100 nanometers before the fragmentation of the graphene sample particles begins to reach 2.9 microfarads. . This means that if a package is made of graphene, it will withstand about two tons of items. The combination of thin and hard material properties of graphene allows it to exert enormous potential in the production of material for military light transport equipment and defensive weapons.
Second, the light transmittance is high. Graphene absorbs about 2.3% of light, and its light transmittance is above 97%, which makes it almost completely transparent, and graphene has good flexibility. It is conceivable that if other components and materials on mobile phones and tablets are also modified with graphene, the display screen of future electronic products may be truly foldable. Such technology will make future military equipment design more convenient and humane. Huirui Technology Co., Ltd. has developed and manufactured a large-area flexible touch screen, which is the market leader in the large-scale graphene flexible touch screen market, and has become a shareholder of IDG Capital, a professional technology industry investment fund. It can be seen that graphene not only has important development prospects in the field of national defense science and technology, but its broad application range has also attracted close attention of private enterprises. In addition to Huirui Technology, South Korea's Samsung announced last year that it has successfully applied graphene to touch flat panel displays and produced transparent and flexible displays made of materials such as multilayer graphene, which can be widely used in mobile devices.
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