Recently, Wu Zhongshuai, a researcher of the Special Zone for 2D Material and Energy Device Innovation Special Zone of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Klaus Müllen, a professor at the Max Planck Institute for Polymer Research in Germany, and Feng Xinliang, a professor at Dresden University of Technology, cooperated to adopt the electrochemical stripping method Fluorine-doped graphene was efficiently prepared, and high-energy-capacity all-solid-state planar micro-supercapacitors were developed from this. Related research results were published in the "Journal of the American Chemical Society" (Journal of the American Chemical Society).
In recent years, with the rapid development of wearable, portable electronic devices and micro-electromechanical systems (such as micro-robots, micro-sensors) towards light, thin, short, and multi-functional integration, it is urgent to develop high energy density, flexibility, Miniaturized energy storage devices.
Recently, the research team developed a green and environmentally friendly electrochemical stripping method to prepare fluorine-doped graphene in one step. The method uses graphite as a raw material, and in a neutral fluorine-containing aqueous electrolyte, the electrochemical method is used to achieve efficient stripping of graphite and fluorine doping in one step, so that fluorine-doped graphene can be prepared in a large amount. Researchers obtained the fluorine-doped graphene microelectrode through the mask-assisted filtration method. Using high-voltage ionic liquid gel as the electrolyte, they successfully assembled a high specific energy all-solid miniature supercapacitor with an energy density of up to 56mWh / cm3. At the same time, the micro-supercapacitor has excellent flexibility and cycle stability, and the capacity retention rate after 5000 cycles in a curved state is 93%. In addition, the miniature energy storage device also exhibits good modular integration capabilities, which can effectively regulate the output operating voltage and capacity. This work provides a new strategy for the efficient preparation of doped graphene and high-performance micro-supercapacitors.
The above work was supported by the National Natural Science Foundation of China, the National Key R & D Program, and the National Youth Thousand Talents Program.
Industrial sectional doors are the most durable and longest lasting doors to ensure circulation at the areas of the factory entrance and exit of goods, loading and unloading areas.
The body of sectional door is forming by 40 mm sandwich panels. These panels provides sound and heat insulation due to the intense doped polyurethane insulation was injected between galvanized steel sheet. (50 kg/m3).
Industrial sectional door systems provide space-saving with opening parallel to the ceiling.Any opening can be used clearly . and produces in accordance with the transition range and the height in the factory buildings or warehouses.
Doors is working sliding by be the most appropriate the gap between the top level of the gate with a ceiling height within the side rasils. The door can be mounted in different ways according to the gap distance (standard, low, highlift and vertical track systems).
Industrial sectional doors can easily be opened automaticly by 230-380 V-AC/50 Hz electric motor or manualy thanks to torsion spring system that balances the weight of the door.The galvanized springs are made to be durable of 25.000 door cycles.Motor with emergency chain All the drive systems have a mechanical back-up system fitted to the reduction gearbox of the electric motor, so that the sectional door can be opened if the power fails. The reduction gearbox can then be powered using the chain.
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