According to foreign media reports, the Pacific Northwest National Laboratory (PNNL) has developed a new battery electrolyte formulation that aims to extend battery life and battery capacity, thereby increasing the mileage of electric vehicles.
In a separate project, engineers at the University of Colorado are developing electric vehicle technology to ensure that vehicles use wireless charging technology. The new battery electrolyte can double the life of the battery, This will increase the cruising mileage of electric vehicles by 2-3 times. PNNL is focused on meeting the current challenges and technical challenges of lithium-ion batteries.
The researchers added a fluorine-based solvent to the electrolyte, and the lithium-based salts changed to salt clusters, which formed localized, highly concentrated lithium salts in the solution. To prevent corrosion of the electrolyte, so as to avoid the formation of lithium crystal branches.
During crystallization, these lithium salt crystals tend to form crystal or dendritic structures, which resemble snowflake-like and frost patterns. In addition, lithium crystal branches can easily lead to short-circuit of the battery and shorten its service life.
The electrolyte concept has been tested on laboratory battery cells, but the cell size is only as large as the watch battery. After charging and discharging 100 times, although the traditional electrolyte can still maintain its battery capacity, the new The developed electrolyte can withstand 700 times of charge and discharge process, making the service life of the battery up to 7 times.
The concept of using electric field to realize radio energy transmission is considered to be impossible to achieve in practical applications. Because the gap between the vehicle and the road is large, the current capacity generated by it is extremely small.
The researchers designed an array of parallel metal plates. Each group of metal plates consisted of a bottom plate and a top plate. The gap between them was 12 cm. The top plate was a power receiving plate connected to the vehicle, and the bottom plate was a power transmission plate. Fixed on the pavement.
The device can transmit megahertz currents, using a 12-cm gap to deliver current.