Lithium batteries have revolutionized mobile electronic devices

Lithium batteries have revolutionized mobile electronic devices. Lithium batteries have revolutionized mobile electronic devices and are used in new energy devices, but new skills will be needed to further improve life and power. One option is a lithium metal battery, which has a longer life and a faster charging speed, but this technology has problems. Lithium deposits are called dendrites, and they tend to grow on the anode and may form a short circuit that can cause battery failure, fire, or explosion. Now, researchers from the Institute of Chemistry of the Chinese Academy of Sciences, the University of the Chinese Academy of Sciences, and the my country High Pressure Science and Technology Research Center have designed a membrane separator based on carbon allotropes. It is called graphdiyne, which acts as a lithium ion filter and prevents the growth of dendrites [Shangetal., Material.10(2018)191-199]. Lithium metal batteries are similar in concept to lithium batteries, but rely on lithium metal anodes. During the discharge process, the lithium metal anode supplies electrons to the cathode through an external circuit. However, when charging, lithium is deposited on the anode. It is in this process that unwanted dendrites can be formed. This is the purpose of the diaphragm. A membrane separator made of ultra-thin (10nm) graphite diacetylene (a two-dimensional hexagonal carbon atom monolayer connected by succinic acid chains) has important practical value. Graphite diacetylene not only has elasticity and toughness, but its chemical structure also forms a uniform pore network, allowing only one lithium ion to pass through. This regulates the movement of ions through the membrane and makes the diffusion of ions highly uniform. Importantly, this characteristic of the battery effectively inhibits the growth of lithium dendrites. Li Yuliang of the Institute of Chemistry of the Chinese Academy of Sciences, who led the research, explained: Lithium dendrites can stabilize the solid electrolyte interface, thereby extending the life of the device and the coulomb power. It can prevent dendritic short circuit and then travel to battery safety. Researchers believe that graphene-diethyne films can overcome some of the thorny problems faced by lithium and other alkali metal batteries. Graphite diacetylene is a getter material with a hyper-conjugated structure, an inherent band gap, a natural macroporous structure, and semiconductor functions, which provides great prospects for solving serious scientific problems in this field, Li said. Two-dimensional data is also very simple and easy to appear under general laboratory conditions. In an interview with reporters, the researchers said: Although more efforts are needed to improve the quality of graphite diacetylene films on a large scale, we believe that graphite diacetylene may cause serious damage to the safety of lithium batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Research on the application of high-energy density lithium batteries