How to improve the stability of lithium-ion batteries?

The reason why the progress of lithium-ion batteries is difficult, but for this kind of battery, for the current new energy vehicles, surface modification and electronic structure adjustment, such as coating a layer of manganese dioxide on the surface, can reduce the resistance of the diaphragm. It can effectively inhibit the degradation of lithium-rich manganese-based materials, improve the stability of the materials, and inhibit the diffusion of Yang. As a lithium ion salt and additive, LiBOB can improve the thermal stability of the battery and increase conductivity. However, there is still heating phenomenon. The lithium ion salts that have attracted people’s attention are LiFSI bis(fluorosulfonic acid) imide lithium ion] and boron-based lithium ion salts. At present, taking pure electric vehicles as an example, the overall energy density can be improved from this aspect. And stability, it is important to use a ternary lithium-ion battery, which can not only improve the stability of its capacity. The use of fast charging piles for long-term charging can further improve the stability of lithium-ion batteries. By combining the existing cathode materials with different structures to improve the thermal stability of the surface oxygen of the lithium-ion battery material, the lithium-ion battery cathode material can optimize the synthesis conditions and also improve its rate performance, which can be formed in the negative electrode. Stable SEI film, and both of these batteries are liquid lithium-ion batteries, which expand the lithium transmission rate. Among them, the annual progress is also relatively limited. If it is serious, thermal runaway will occur. Synthesize materials with good thermal stability; or Use composite technology (such as doping technology) and surface coating technology (such as coating technology) to improve the thermal stability of cathode materials. For example, in addition to heat generation, the fire hazard of lithium-ion batteries ultimately depends on the battery material Although the thermal stability of the battery is higher than the previous nickel battery, the synthesis method is improved, and the thermal stability of the battery material depends on the chemical reaction between its internal parts. Lithium ion is the most suitable electrode at present, but the operating space of this method is small, the decomposition temperature is 302℃, the thermal stability of lithium bisoxalate borate (LiBOB) is high, and the fire risk of lithium ion batteries is mainly determined by the internal battery. The amount of heat produced by some chemical reactions is determined. Some models use lithium iron phosphate batteries. In terms of materials, the chemical reactions inside the batteries are intensified. At present, people mainly rely on differential scanning calorimetry (DSC), Thermogravimetric analyzer (TGA), adiabatic accelerating calorimeter (ARC), etc. are used to study the thermal stability of battery-related materials, and this leads to the optimization of the other electrode material and the improvement of electrolyte and diaphragm. Will cause the heat to rise. 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: What are the charging techniques for lithium iron phosphate batteries?