Researchers have developed a compact lithiuma battery that retains about 80% of its charge in ultra-low temperatures. The technology can be used in mobile phones, cameras, laptops and electric vehicles.
Although the batteries are currently runningin Antarctica, Antarctica and in space, but additional thermal insulation and heating system make them bulky. These measures are necessary to prevent cooling of the anode from soft graphite and mercury, since their effectiveness decreases upon freezing.
For in order for the battery to withstand extreme cold,Scientists from the Dalian Institute of Chemical Physics used solid carbon and lithium vanadium phosphate. According to them, unlike graphite, solid carbon is much more resistant to low temperatures due to its uneven structure of atomic layers.
To avoid the rapid depletion of lithium ions,To increase the service life and increase the safety of operation, a composite material was used as a positive cathode. It not only provides a sufficient amount of ions, but also reduces the risk of fire, and at the same time is also quite cheap.
The created prototype can save up to 80% of its charge at a temperature of -40 ° C. Despite success, scientists say the technology is not yet ready for commercial use.
The presented battery prototype is too smallfor use in real devices, and to increase its size, innovative engineering solutions are required. Therefore, the team turned to battery manufacturers.
Russian researchers have also been successful inthe development of advanced energy storage technologies. Recently, scientists from Moscow State University synthesized new material for sodium-ion batteries, the cost of which is 100 times lower than lithium-ion analogues.