Why is the lithium-ion battery of electric vehicles not replaced by graphene batteries?

In electric vehicles, the three-electric system is the core, and the battery in it is the core of the core. The battery plays a very important role as the source of power energy and the power of the whole vehicle. At present, the mainstream batteries for electric vehicles use lithium-ion batteries, which have moderate energy density, are relatively mature, and have comparative advantages in manufacturing costs. However, lithium-ion batteries also have very fatal weaknesses. For example, they have poor safety and are prone to fire; for example, the charging speed is slow, and it can take several hours at the earliest. Not only that, the internal impedance of lithium-ion batteries is high. Because the electrolyte of lithium-ion batteries is an organic solvent, its conductivity is much lower than that of nickel-cadmium batteries and nickel-hydrogen batteries. Therefore, the internal impedance of lithium-ion batteries is about 11 times larger than that of nickel-cadmium and nickel-hydrogen batteries. . For example, the impedance of a single battery with a diameter of 18mm and a length of 50mm is approximately 90m. In addition, the operating voltage of lithium-ion batteries varies greatly. For example, when the battery is discharged to 80% of the rated capacity, the voltage change of the nickel-cadmium battery is small (about 20%), and the voltage change of the lithium-ion battery is relatively large (about 40%). This is a serious shortcoming for battery-powered equipment, but because the discharge voltage of a lithium-ion battery changes greatly, it is easy to detect the remaining battery power based on this. The graphene battery is a new energy battery developed by using the characteristics of lithium ions to rapidly and massively shuttle between the graphene surface and the electrode. Graphene is not a new concept anymore. Experts and scholars at home and abroad have been working on it for many years. Although there are some exciting experimental phenomena and results, it is only in the stage of theoretical exploration in the laboratory. Its manufacturing, processing, and application efficiency There are many problems in all aspects. Therefore, graphene batteries are currently unable to meet the conditions for mass production, so they cannot replace lithium-ion batteries for the time being. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the methods for sorting and collecting used batteries?