The Batteries don't Overheat Explosion
Ordinary lithium ion battery is composed of two electrode and organic electrolyte, stabbing, short circuit or overcharge can make the battery heat, when the temperature reached 150 degrees Celsius, the battery might be a fire or explosion. Researchers at Stanford universitys official website reported that nanoscale pointed to the surface with a protrusion of tiny nickel particles outside the parcel a graphene layer, and then embedded in elastic polyethylene film, and then make the polyethylene film to connect an electrode of the battery.
Under normal temperature, film of nickel particles touch each other, connection, make the conductive film, batteries work normally; And when the thermal expansion occurs, will separate between nickel particles, make the film insulation, battery electric current cannot flow out. Researchers put battery heating to more than 70 degrees Celsius, elastic polyethylene film like a balloon expansion, to separate nickel particles, battery close; And when the temperature dropped to below 70 degrees Celsius, polyethylene film contraction, reconnect the nickel particles, cells continue to function. , say the researchers can choose by implantation of nickel particles or the kinds of polymer materials to regulate the temperature of power, "for example, we can let the battery in 50 degrees or 100 degrees off".