What method can prevent the lithium battery from catching fire?

Ways to prevent lithium batteries from catching fire Nano-engineers at the University of California, San Diego have developed a safety feature that can prevent lithium metal batteries from heating up and catching fire in the event of an internal short circuit. The team has made clever adjustments to the part called the separator in the lithium battery. The separator is the barrier between the positive and negative electrodes of the lithium battery. In this way, when the lithium battery is short-circuited, the energy (that is, heat) accumulated inside the battery The flow will slow down. After repeated charging of lithium metal batteries, a needle-like structure of dendrites will appear on the anode. Over time, the dendrites grow long enough to penetrate the diaphragm and build a bridge between the anode and cathode, causing an internal short circuit. When this happens, the flow of electrons between the two electrodes is out of control, causing the lithium battery to immediately overheat and stop working. 1. Add flame retardant to the existing electrolyte. However, in order to complete the flame retardancy, it is necessary to add a large amount of flame retardant to the electrolyte, which will correspondingly reduce the ionic conductivity of the electrolyte and significantly affect the electrochemical performance and energy density of the lithium battery. 2. Protection is achieved by adding a dedicated protection circuit, such as: to prevent overcharging of lithium batteries, install a PTC polymer switch or explosion-proof safety valve in the safety helmet of the battery. 3. The thermal stability of lithium batteries is related to the type of cathode material and electrolyte. By optimizing the synthesis conditions and improving the synthesis method, the cathode material with good thermal stability is synthesized. 4. Weakly oxidize the surface of carbon materials, such as: reduction, doping, surface modification, etc.; or use spherical, fibrous carbon anode materials to improve the thermal stability 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 it. Previous post: What are the important manifestations of the battery short-circuit phenomenon?