Explanation

The single-layer graphite sheet is a two-dimensional crystal i with hexagonal honeycomb lattice formed by a layer of carbon atoms through Sp2 hybridization. graphene is the thinnest two-dimensional materials in the world. The thickness of a single layer of graphene is only 0.34nm, about 200000 times the diameter of a hair. graphene has many excellent properties, such as mechanical, optical, electrical, thermal and other physical chemistry properties, and also has a huge specific surface graphene is the materials with the highest strength and hardness so far, and its tensile strength and elastic modulus are 125 GPa and 1.1 TPa respectively. graphene has excellent electrical properties and high mobility, about 140 times the mobility of Guizhong electron. graphite thin has very high thermal conductivity. Its room temperature thermal conductivity is about 5000W/(m? K), more than 10 times the thermal conductivity of copper at room temperature. At present, the preparation methods of graphene mainly include mechanical stripping method, epitaxial growth method, redox method, liquid phase stripping method, organic synthesis method, solvothermal method, chemical vapor deposition method, etc. According to its super thin and super strong characteristics, graphene can be widely used in various fields, such as ultralight bulletproof clothing, ultrathin ultralight aircraft materials, etc. Due to its excellent electrical properties, it also has great potential for application in the field of microelectronics, potentially replacing silicon in the manufacturing of ultra micro transistors. Due to its high conductivity and high specific surface area, graphene materials also have broad application prospects in new energy fields such as supercapacitors, Li ion battery, etc.

Classification