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According to foreign media reports, the Pacific Northwest National Laboratory (PNNL) has developed a new battery electrolyte formulation designed to extend the battery life and battery capacity, thereby increasing the mileage of electric vehicles.
In a separate project, engineers at the University of Colorado in the United States are developing electric vehicle technology to ensure that wireless charging is used while the vehicle is in motion. The new battery electrolyte can increase the lifespan of the battery by a factor of 7 and thus increase the cruising range 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. Lithium-based salts change to salt clusters, which can form localized, highly concentrated lithium salts in the solution. Prevent the electrolyte from being corroded so as to avoid the formation of lithium crystal branches.
When crystallized, these lithium salt crystals tend to form crystal or dendritic structures, resembling 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 new idea of ​​the electrolyte has been tested on the laboratory battery cell, but the size of the cell 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 newly developed electrolyte can withstand 700 times of charge and discharge process, making the service life of the battery more than 7 times.
The concept of using electric fields to achieve the transmission of radio energy is considered impossible to achieve in practical applications because the gap between the vehicle and the road is large and the current capacity generated by it is extremely small.
The researchers designed an array of parallel metal plates, each consisting of a base plate and a top plate, with a gap of 12 cm. The top plate is a power receiving plate, which is connected to the vehicle, and the bottom plate is a power transmission plate that is fixed on the road surface.
The device can transmit megahertz currents and use a 12-cm gap to deliver current.
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