The Independent reports .
The technology could be an alternative to expensive solid-state batteries while maintaining efficiency even at low temperatures. According to the researchers, the new approach aims to increase energy density and battery stability in extreme conditions.
What is the problem with modern batteries?
Most electric vehicles today use traditional lithium-ion batteries. Their limitations include:
– maximum energy density of about 350 watt-hours per kilogram;
– loss of some efficiency in cold weather;
– significant proportion of liquid electrolyte, which makes it difficult to reduce size and weight.
That is why leading automakers are investing in the development of solid-state batteries, which are considered the promising next stage in energy storage technology.
What scientists have proposed
Chinese researchers have used a new type of solvent based on fluorinated hydrocarbons. This change in the composition of the electrolyte has allowed:
– transfer electrical charge more efficiently;
– reduce the amount of liquid component inside the battery;
– maintain operability at temperatures down to -50°C.
Professor Zhao Qing explained that normally the speed of ion movement and the speed of charge transfer mutually limit each other, but the new chemical formula helped achieve a balance between these processes.
According to published data:
– over 700 watt-hours per kilogram at room temperature;
– about 400 watt-hours per kilogram at -50°C.
That's almost double the performance of most current lithium batteries. One of the study's co-authors, Chen Jun, noted that an electric car with a range of 500 km could theoretically travel more than 1,000 km on a single charge.
The development was also reported by Chinese state broadcaster CCTV .
The new battery can be used for:
– in electric vehicles in regions with cold climates;
– in drones and transport operating in high altitudes;
– in energy storage systems in extreme conditions.
If the technology can be scaled up and put into mass production, it could significantly impact the electric vehicle market, increase car autonomy, and reduce dependence on frequent recharging.
