2200mah 18650 battery

Graphyne is used in the research of various energy storage devices such as 2200mah 18650 battery and sodium-ion batteries

Graphyne material is a two-dimensional planar all-carbon material that can be synthesized at low temperature and normal pressure and contains both sp and sp2 hybrid forms of carbon. It is a new research field led by Chinese scientists internationally and has Chinese intellectual property rights. At present, graphyne has achieved rapid large-scale preparation of samples and controllable preparation of large-area, high-quality films of hundreds of square centimeters. Graphyne has a large conjugated system, excellent electrical conductivity, and excellent chemical stability. In particular, the rich molecular pores can provide more storage space and sites, which is conducive to the adsorption and transmission of metals such as lithium and sodium. Therefore, graphyne materials have shown excellent comprehensive performance and huge application space in various energy storage devices. The basic and applied research of graphyne has always attracted the attention of scientists from all over the world. Recently, under the guidance of Li Yuliang, an academician of the Chinese Academy of Sciences, the Carbon-based Materials and Energy Applications Research Group led by Huang Changshui, a researcher at the Qingdao Institute of Bioenergy and Process Technology, Chinese Academy of Sciences, has applied graphyne materials to a variety of energy storage devices such as 2200mah 18650 battery, sodium-ion batteries, supercapacitors, and lithium-sulfur batteries, and conducted in-depth research on the structure-activity relationship between the structure and electrochemical properties of graphyne materials. The research group has developed and prepared a new type of boron-substituted graphyne, and conducted in-depth analysis of its band structure, electrochemical properties and sodium storage mechanism by combining theoretical calculations with device performance characterization. Through theoretical calculations, the distribution of the energy levels of boron-substituted graphyne materials on the acetylenic bond (sp carbon) and the central heteroatom (B) was studied, and the relationship between the energy level structure of this type of material and the transport performance shown in the experiment was further analyzed. By combining the theoretical analysis results of the double-layer arrangement configuration of boron-substituted graphyne with the XRD scattering angle and molecular pore size and distribution obtained in the experiment, the intrinsic relationship between the molecular structure of boron-substituted graphyne and the molecular plane stacking mode and pore size structure was explored. The study found that the special chemical adsorption of borane substituted with graphyne on sodium atoms can obtain extremely high theoretical sodium storage capacity. The device test results also confirmed that the sodium ion battery with borane substituted with graphyne as electrode material has excellent comprehensive performance, which fully demonstrated that this type of material has strong application potential in sodium ion battery devices and opened up a new direction for the research of electrode materials for new energy storage devices.

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