Stanford researchers have invented a initial lithium-ion battery that shuts itself down on overheating and restarts when it cools down, according to a Stanford News report. The new growth severely reduces risk due to overheating.
Several techniques have been used formerly used to residence battery overheating, such as adding fire retardants to a electrolyte used in a battery. However, these techniques were all irreversible, so a battery is not organic after reaching a certain temperature.
In sequence to residence this problem, Stanford highbrow of engineering Zhenan Bao, Stanford operative Yi Cui and postdoctoral academician Zheng Chen used little nickel particles coated with graphene and embedded in a film of effervescent polyethylene. When in hit with one another, these particles control electricity. However, on thermal enlargement of a film, a particles widespread apart, crude a upsurge of current.
The threshold for this battery was found to be 160 degrees Fahrenheit (70 degrees Celsius). Above this temperature, a polyethylene film expanded, causing a nickel particles to separate. When a feverishness fell behind to 160 degrees Fahrenheit (70 degrees Celsius), a film shrunk back, causing a battery to beget electricity again.
Furthermore, according to Bao, “We can even balance a feverishness aloft or reduce depending on how many particles we put in or what form of polymer materials we choose.”
The element was tested several times by regularly requesting heat, and it quick resumed generating electricity when it cooled.
“Compared with prior approaches, the pattern provides a reliable, fast, reversible plan that can grasp both high battery opening and softened safety,” Cui said. This record is approaching to be rarely useful in place of normal batteries.
Contact Dhaval Gajiwala during gajiwala ‘at’ stanford.edu.