graphene powder for coating and printing ink   the performance and the application  this series of products can be covalent and non covalent functionalization, so it can be widely used in composite materials, optoelectronic materials and devices and biomedicine fields. this series of products with a thickness of 1~20nm, chip size is 1~50 um, stably dispersed in various organic solvents in the high-speed stirring or ultrasonic conditions, with high specific surface area and higher thermal conductivity properties, thus can improve the material corrosion and high temperature characteristics, can be used as conductive agent (plastic, coating, rubber), antistatic material, electrode material (chemical power source, sensors, solar cells, fuel cells) and catalyst carrier etc. .