What is the reason why the lithium-ion batteries of electric vehicles have not been replaced by graphene batteries?

In electric vehicles, the three-electric system is the center, and the battery in it is the center of the center. The battery, as the source of power energy and the power of the whole vehicle, plays a very important role. At present, the main battery of electric vehicles is lithium-ion battery, which has moderate energy density and is relatively mature, and the production cost is also relatively advantageous. However, lithium-ion batteries also have very fatal weaknesses. For example, they have poor safety and can easily cause a fire. For example, the charging speed is slow, and it takes 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 changes significantly. 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 of the lithium ion battery changes greatly (about 40%). For battery-powered equipment, this is a serious flaw, but because the discharge voltage of a lithium-ion battery changes greatly, it is easy to test the remaining power of the battery based on this. The graphene battery is a new energy battery that uses lithium to quickly and massively move between the graphene surface and the electrode. Graphene is no longer a new concept. Experts and scholars at home and abroad have been working on it for many years. Although there are some exciting experimental phenomena and results, they are only at the stage of theoretical exploration in the laboratory. Its production, production 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 article: Why does lithium ion battery spontaneously ignite?