A new type of lithium battery that can work normally even on fire, greatly improving the safety of lithium batteries~

In daily life, mobile phones, computers, electric cars, etc. have become part of our lives, and these electronic products are inseparable from lithium-ion batteries. Recently, a research team led by Professor Yi Cui from Stanford University has made a major breakthrough in the safety of lithium metal batteries. The team developed a new type of lithium metal battery electrolyte, which is not only ultra-light, high energy density, but also has good safety performance even if it catches fire! For a long time, improving the energy density of lithium batteries has become an important direction of lithium battery research. Generally speaking, the higher the energy density of a lithium battery, the longer the battery life. However, lithium metal batteries also have their own shortcomings, so safety needs to be improved. It can be understood that lithium batteries mainly rely on electrolyte to transfer current between the positive electrode and the negative electrode. As the amount of current transmission continues to increase, something called lithium dendrites will grow on the surface of the lithium metal electrode. This kind of lithium crystal branch will pierce the electrolyte between the positive and negative electrodes of the battery, so the direct connection of the positive and negative electrodes of the battery will cause a short circuit, which may cause fire or explosion. To this end, Cui Yi’s team used high mechanical strength polyimide (Polyimide, PI), flame retardant decabromodiphenyl ethane (DBDPE) and highly conductive polyethylene oxide (PEO). A new solid electrolyte composed of lithium bis(trifluoromethanesulfonamide) (LiTFSI). ). The test conducted for 300 hours at 60°C proved that this high-strength electrolyte material can well inhibit the growth of lithium dendrites, and because the new electrolyte is added with flame-retardant DBDPE material, it can be used within 2 seconds after the start of the lithium battery Self-extinguishing, fireproof performance is very good. The research of Cui Yi's research team shows that lithium metal batteries have high energy density and strong safety. Obviously, this achievement points out a new path for the safety research of lithium metal batteries. Disclaimer: The articles published on this site are all from the Internet and do not represent the views of this site. If there is any infringement, please contact to delete WeChat: Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact delete A: A new type of lithium battery cathode material with dual-ion electrochemical activity has been developed!