According to foreign media reports, the Pacific Northwest NaTIonal Laboratory (PNNL) has developed a new battery electrolyte formula designed to extend battery life and battery capacity, thereby increasing the cruising range of electric vehicles.
In a separate project, engineers at the University of Colorado are developing electric vehicle technology to ensure that wireless charging technology is used while the vehicle is in motion. The new battery electrolyte can increase the life of the battery by a factor of seven, which increases the cruising range of the electric vehicle by 2-3 times. PNNL is focused on addressing the current challenges and technical challenges of lithium-ion batteries.
The researchers added a fluorine-based solvent to the electrolyte. The lithium-based salts will become salt clusters, which will form a local spherical high-concentration lithium salt in the solution. Prevent electrolyte corrosion and avoid the formation of lithium crystal branches.
At the time of crystallization, such lithium salt crystals tend to form a crystal branch or a dendritic structure, and the shape resembles a snowflake shape and frost patterns. In addition, lithium crystal branches are prone to short-circuit the battery and shorten its service life.
The new concept of the electrolyte has been tested on the battery cells of the laboratory, but the size of the battery is only as large as the watch battery. After charging and discharging 100 times, although the traditional electrolyte can maintain its battery capacity, the newly developed electrolyte can withstand 700 charge and discharge processes, resulting in a seven-fold increase in battery life.
The idea of ​​using electric fields to achieve wireless energy transmission is considered impossible in practical applications because the gap between the vehicle and the road is large, and the current capacity generated is extremely small.
The researchers designed an array of parallel metal plates, each of which consisted of a bottom plate and a top plate with a gap of 12 cm. The top plate is a power receiving board that is connected to the vehicle, and the bottom plate is a power transmission plate that is fixed on the road surface.
The device delivers megahertz current and delivers current with a 12 cm gap.
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